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31results about How to "High photocatalytic degradation activity" patented technology
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Method for preparing nanometer composite with chrysanthemum structure
InactiveCN103521163AImprove adsorption capacityHigh photocatalytic degradation activityPhysical/chemical process catalystsWater/sewage treatment by irradiationVisible light photocatalyticUltrasonic dispersion
The invention relates to a nanometer composite, and particularly relates to a method for preparing a nanometer composite with a chrysanthemum structure. The method comprises the steps of adding titanium dioxide nanosheets into deionized water, carrying out ultrasonic dispersion, and obtaining a titanium dioxide dispersing liquid; under the condition of magnetic stirring, adding sodium molybdate and thioacetamide into the titanium dioxide dispersing liquid, and obtaining a mixed solution A; after finishing adding, stirring the mixed solution continuously, then transferring the mixed solution into a Teflon inner container, sealing the inner container in a stainless steel hydrothermal reaction kettle for hydrothermal reaction, after finishing the hydrothermal reaction, naturally cooling the reaction kettle to room temperature, centrifuging the obtained product, washing, vacuum drying and obtaining the composite. The method has the advantages that the source of raw materials is wide, and the method is simple and practicable and has low cost. The prepared titanium dioxide or molybdenum disulfide nanometer composite not only has good capacity in absorbing organic contaminants, but also has a good visible light photocatalytic degradation effect to organic contaminants.
Owner:JIANGSU UNIV
Soft magnetic composite photocatalyst and preparation method thereof
InactiveCN102145293AImprove photocatalytic activityEasy to separate and recycleMetal/metal-oxides/metal-hydroxide catalystsFiltrationManganese
The invention discloses a soft magnetic composite photocatalyst and a preparation method thereof, belonging to a sewage treatment technology and aiming to provide the soft magnetic composite photocatalyst easy to separate and recycle and the preparation method thereof. The technical scheme adopted by the invention comprises the following key point that granular active carbon is loaded with soft magnetic Mn0.5Zn0.5Fe2O4 and TiO2. The method for preparing the soft magnetic composite photocatalyst comprises the following steps of: (1) after manganese sulfate, zinc sulfate and green copperas are prepared into a mixed solution by ionized water, adding the granular active carbon into the mixed solution, uniformly stirring and reacting in a hydro-thermal reaction kettle, cooling, filtering, washing and drying a reaction product to obtain soft magnetic active carbon; and (2) preparing tetrabutyl titanate, absolute ethyl alcohol, nitric acid and water into a titanic acid solution, impregnating the soft magnetic active carbon into the titanic acid solution, carrying out stirring, standing, pumping filtration and drying on the impregnated soft magnetic active carbon, then calcining the obtained product in a muffle furnace in an inert atmosphere, and cooling the calcined product to the room temperature to form the soft magnetic composite photocatalyst. The soft magnetic composite photocatalyst is used for organic wastewater treatment.
Owner:HENAN NORMAL UNIV
Preparation method of cerium-doped NH2-UiO-66/indium zinc sulfide composite visible-light-induced photocatalysts
InactiveCN110124740ALow costGood repeatabilityWater/sewage treatment by irradiationWater treatment compoundsGreen environmentIndium
The invention relates to a preparation method of cerium-doped NH2-UiO-66 / indium zinc sulfide composite visible-light-induced photocatalysts. The preparation method comprises the following steps: preparing cerium-doped NH2-UiO-66 by adopting a solvothermal method, then carrying out a hydrothermal reaction by using an in-situ growth method to separately obtain a cerium (IV)-doped NH2-UiO-66 / indium zinc sulfide composite visible-light-induced photocatalyst and a cerium (III)-doped NH2-UiO-66 / indium zinc sulfide composite visible-light-induced photocatalyst. The preparation method has the beneficial effects that cost is low, repeatability is high, and the preparation conditions are mild and controllable. The prepared cerium-doped NH2-UiO-66 / indium zinc sulfide composite visible-light-induced photocatalysts are green environment-friendly photocatalysts, and the cerium-doped NH2-UiO-66 is compounded with indium zinc sulfide, so that photocatalytic degradation activity can be effectively improved, and therefore, the preparation method has a certain application prospect in the field of water pollution treatment.
Owner:CHANGZHOU UNIV
Composite photocatalyst-DyVO4/g-C3N4 and preparation method thereof
InactiveCN104549403AHigh photocatalytic degradation activityPhysical/chemical process catalystsCatalytic efficiencyChemistry
The invention discloses a method for preparing a composite photocatalyst-DyVO4 / g-C3N4 and the composite photocatalyst prepared by adopting the method. The raw materials used in the method are readily available, the preparation conditions are easy to realize, and the prepared composite photocatalyst is high in catalytic efficiency under visible light catalysis conditions.
Owner:FUYANG NORMAL UNIVERSITY
Tin-silver co-doped nano-zinc oxide as photocatalyst and preparation method thereof
InactiveCN106423162AReduce dosageReduce photocatalytic degradation activityWater/sewage treatment by irradiationWater treatment compoundsWater bathsZno nanoparticles
The invention discloses a preparation method of tin-silver co-doped nano-zinc oxide as a photocatalyst. The method comprises the steps that 1, zinc nitrate, tin tetrachloride, a complexing agent and glucose are dissolved in deionized water to form a solution, then acrylamide and methylene bisacrylamide are added in sequence, the solution is stirred to be uniform, heated in a water bath and stirred till white wet gel is formed, and the wet gel is dried, ground into powder and calcined to obtain tin doped nano-zinc oxide; 2, the tin doped nano-zinc oxide, silver nitrate, a complexing agent and glucose are dissolved in deionized water to form a solution, then acrylamide and methylene bisacrylamide are added in sequence, the solution is stirred to be uniform, heated in a water bath and stirred till brown wet gel is formed, and the wet gel is dried, ground into powder and calcined to obtain the tin-silver co-doped nano-zinc oxide. Through the preparation method, production cost is lowered while the photocatalytic activity of nano-zinc oxide is improved.
Owner:SOUTHWEST UNIVERSITY FOR NATIONALITIES
Preparation method of carbon-nitrogen co-doped nano-titanium dioxide
InactiveCN105749950AEfficient preparationHigh photocatalytic degradation activityPhysical/chemical process catalystsMass ratioSolvent
The invention discloses a preparation method of carbon-nitrogen co-doped nano-titanium dioxide. The method comprises the steps of: 1) ultrasonic treatment: mixing titanium dioxide, a carbon-nitrogen source and a solvent in a mass ratio of 1:0.01-0.5:50-100, and performing ultrasonic treatment for 0.5-2h to obtain a mixture A; 2) microwave heating: transferring the mixture A into a high pressure reaction kettle with a pressure of 5-30mPa, then placing the high pressure reaction kettle in a microwave oven with power of 200-1000W, and conducting heating for 30-150s to obtain a mixture B; 3) filtering and drying: filtering the mixture B in a filter equipped with a 0.2micrometer PTFE membrane, and drying the obtained filter cake at 80-150DEG C for 10-30min so as to obtain the carbon-nitrogen co-doped nano-titanium dioxide. The carbon-nitrogen co-doped nano-titanium dioxide prepared by the method provided by the invention shows high photocatalytic degradation activity to organic pollutants under visible light irradiation, and the degradation rate is more than 90%.
Owner:SHENZHEN XIANGFENGHUA TECH CO LTD +1
Nano titanium dioxide photocatalyst with double-particle size distribution and preparation method thereof
ActiveCN106607015AEasy to recycleGuaranteed decentralizationPhysical/chemical process catalystsWater/sewage treatment by irradiationHigh activityPhotocatalytic degradation
The invention provides a nano titanium dioxide photocatalyst with double-particle size distribution and a preparation method thereof. The method includes: dissolving an organic titanate in an alcohol solution, adding an aqueous solution of polyacrylic acid and polyvinylpyrrolidone dropwise under stirring to prepare a transparent titanium dioxide sol; then adding a commodity nano titanium dioxide powder and carrying out ultrasonic stirring to obtain titanium dioxide colloids from transparent to translucent; and finally conducting spray drying, thus obtaining the nano titanium dioxide photocatalyst with double-particle size distribution. The titanium dioxide photocatalyst prepared by the method provided by the invention has no need for adding any surfactant or dispersant during use, by water adding and stirring, a high-stability nano titanium dioxide photocatalyst spray solution can be prepared, and can be placed stably for more than 6 months. The catalyst provided by the invention has high activity on photocatalytic degradation of organic matters under sunlight, and the degradation rate is 40% higher than that the existing commodity nano titanium dioxide P25.
Owner:广州市逸都环保科技有限公司
ZnSn(OH)<6> powder, and preparation method and application thereof
ActiveCN106564935AHigh photocatalytic degradation activityImprove photocatalytic efficiencyTin compoundsWater/sewage treatment by irradiationUltraviolet lightsAqueous solution
The invention discloses a ZnSn(OH)<6> powder, and a preparation method and application thereof. According to the preparation method, Zn(NO<3>)<2>.6H<2>O is dissolved into a glycol solution; SnCl<4>.5H<2>O is dissolved into an aqueous solution; the two solutions are mixed to obtain a precursor solution; the pH value of the precursor solution is adjusted with hydrazine hydrate; and the cubic phase ZnSn(OH)<6> powder of a space group structure being Pn-3m. The preparation method is simple in procedure and easy to operate, the reaction time is short, and the reaction condition is mild. After the synthesized ZnSn(OH)<6> powder is irradiated by ultraviolet light for 30 min, the degradation rate of the ZnSn(OH)<6> powder to Rhodamine B (RhB) reaches up to 87%. The ZnSn(OH)<6> powder has good application prospects.
Owner:SHAANXI UNIV OF SCI & TECH
Carbon-doped titanium dioxide photocatalyst, and preparation method and application thereof
PendingCN111215042AFast degradationImprove degradation efficiencyPhysical/chemical process catalystsWater/sewage treatment by irradiationPhotocatalytic degradationCarbon doped
The invention relates to the technical field of catalytic materials, and concretely relates to a carbon-doped titanium dioxide photocatalyst, and a preparation method and an application thereof. A titanium-based metal organic framework is prepared from an organic ligand and a titanium source, and the titanium-based metal organic framework is used as a template to prepare the carbon-doped titaniumdioxide photocatalyst with a porous structure and a high specific surface area. According to the photocatalyst, the contact area with pollutants can be increased, photo-generated charges can be rapidly transferred to the surface of the photocatalyst, electron-hole separation is promoted, meanwhile, the band gap of TiO2 can be reduced through doping of the carbon element, and the absorption range of visible light in sunlight is widened, so the photocatalytic degradation activity is improved.
Owner:GUANGDONG UNIV OF TECH
Carbon nitride quantum dot/titanium dioxide sol and preparation method thereof
InactiveCN108772094AHigh catalytic activityHigh photocatalytic degradation activityPhysical/chemical process catalystsWater/sewage treatment by irradiationQuantum yieldCatalytic effect
The invention relates to carbon nitride quantum dot / titanium dioxide sol. The titanium dioxide sol is prepared from titanium dioxide crystal grains, and a diffraction angle 2theta of the titanium dioxide sol has diffraction peaks at 8.78+ / -0.2 degrees, 26.66+ / -0.2 degrees, 38.8+ / -0.2 degrees, 46.75+ / -0.2 degrees, and 58.07+ / -0.2 degrees. A catalytic effect of a titanium dioxide composite materialprepared by the preparation method of the carbon nitride quantum dot / titanium dioxide sol is significantly improved, the degradation rate of 20mg commercial titanium dioxide P25 available in the market at present (brought from Degussa of German) for 100mL methyl orange (18mg / L) in 2 hours is 34.4 percent, and the degradation rate of the 20mg product provided by the invention under the same condition is 87.2 percent and is improved by 2.53 times; and the light current and impedance analysis test shows that the electron-hole is easy to separate, the quantum yield is high, no corrosive reagent isintroduced in the preparation process, the preparation method is environmentally friendly and free from secondary pollution, the product is good in stability and higher in catalytic effect when beingstored for 8 months at the room temperature, the preparation process is simple and feasible, and the industrialized production is easy to implement.
Owner:CHONGQING JIAOTONG UNIVERSITY
Preparation method of Bi-Bi3NbO7 composite photocatalyst and Bi-Bi3NbO7 composite photocatalyst
InactiveCN108479751AWide variety of sourcesHigh activityWater/sewage treatment by irradiationWater treatment compoundsOxalateAcetic acid
The invention relates to a preparation method of a Bi-Bi3NbO7 composite photocatalyst and the Bi-Bi3NbO7 composite photocatalyst. The preparation method comprises the following steps: S01, weighing bismuth nitrate pentahydrate and niobium oxalate, and dissolving the bismuth nitrate pentahydrate and the niobium oxalate into glacial acetic acid and methanol, thus obtaining a first mixed solution; S02, adding phenylcarbinol in the first mixed solution, thus obtaining a second mixed solution; S03, adding a potassium hydroxide solution in the second mixed solution, and carrying out hydrothermal reaction; S04, washing and drying precipitate, thus obtaining Bi3NbO7 nanosheets; S05, dispersing the Bi3NbO7 nanosheets in an ethylene glycol solution, and adding a bismuth source, thus obtaining a third mixed solution; S06, carrying out the hydrothermal reaction on the third mixed solution; S07, washing and drying precipitate, thus obtaining Bi-Bi3NbO7. The preparation method disclosed by the invention has the beneficial effect that through a preparation technology that dipping-hydrothermal reduction and secondary hydrothermal reduction are combined, a high-activity photocatalyst is prepared.
Owner:王楷
Photocatalyst (Cu, Pd)-NiGa2O4/BiVO4 with double promoter and application thereof
ActiveCN110038589ABroaden the photoresponse rangeMany active sitesWater/sewage treatment by irradiationWater treatment compoundsReactive siteWastewater
The invention discloses a photocatalyst (Cu, Pd)-NiGa2O4 / BiVO4 with double promoter and an application thereof. The photocatalyst is prepared by utilizing illumination assisting and a chemical reduction deposition method according to the following steps: dispersing (Cu, Pd)-NiGa2O4 and BiVO4 into an ethanol solution; centrifuging after ultrasonically dispersing for 5.0min; drying the acquired sediment, grinding and transferring into a muffle furnace; thermally treating for 2.0h while keeping temperature at 500 DEG C, thereby acquiring a Z type photocatalyst (Cu, Pd)-NiGa2O4 / BiVO4 compound. Inthe invention, Cu and Pd are capable of providing more active sites as well as accelerating electron transfer. The compounded (Cu, Pd)-NiGa2O4 / BiVO4 photocatalyst applied to degradation of wastewatercontaining N organic dyestuffs has an ultra-high photocatalytic degradation activity.
Owner:LIAONING UNIVERSITY
Bi/beta-Bi2O3 heterojunction material as well as synthesis method and application thereof
PendingCN113797917AThe preparation method is simple and environmentally friendlyEconomical method of preparationWater/sewage treatment by irradiationWater treatment compoundsHeterojunctionPhotocatalytic reaction
The invention relates to a Bi / beta-Bi2O3 heterojunction material as well as a sodium gluconate-assisted synthesis method and application thereof, wherein the method comprises the steps: firstly, dissolving sodium gluconate in water, then adding a PEG4000 aqueous solution, adding a Bi(NO3)3 aqueous solution, mixing with formamide, and preparing a precursor material through a hydrothermal method; and further carrying out heat treatment in a nitrogen atmosphere to obtain the Bi / beta-Bi2O3 photocatalyst material. The Bi / beta-Bi2O3 heterojunction prepared by the preparation method disclosed by the invention is of a nest-shaped graded micro-nano structure and has excellent photocatalytic performance; and the Bi / beta-Bi2O3 heterojunction material has high photocatalytic degradation activity on rhodamine B and levofloxacin hydrochloride, and still has a high degradation rate after a cyclic photocatalytic reaction.
Owner:YANGZHOU POLYTECHNIC INST
Molybdenum disulfide-loaded cobalt-doped zinc oxide photocatalytic degradation material and preparation method thereof
InactiveCN112495402ALattice reductionImprove visible light absorptionPhysical/chemical process catalystsHeterojunctionOptical radiation
The invention relates to the technical field of photocatalytic degradation materials, and discloses a molybdenum disulfide-loaded cobalt-doped zinc oxide photocatalytic degradation material. The morphology of zinc oxide is controlled in the process of synthesizing cobalt-doped flower-like nano zinc oxide by a hydrothermal method to generate nano flower-like zinc oxide, divalent cobalt is doped toreplace divalent zinc in zinc oxide, band-gap energy red shift is generated, the visible light absorption capacity of zinc oxide is improved, the molybdenum disulfide-loaded cobalt-doped zinc oxide photocatalytic degradation material is synthesized through a thermal flux method, the zinc oxide and the molybdenum disulfide are matched in energy band, a heterojunction structure can be formed, the electrons of zinc oxide and molybdenum disulfide are excited under optical radiation and transit from a valence band to a conduction band to form carriers, recombination of photo-induced electrons and holes is inhibited, meanwhile, the photo-induced electrons are gathered on the conduction band of zinc oxide and form superoxide radicals after adsorbing oxygen, the superoxide radicals can react withwater to generate hydroxyl radicals, and organic matters can be degraded at high efficiency.
Owner:桐乡市吉曼尔信息技术有限公司
Composite photocatalyst, preparation method thereof, and application of catalyst in degradation of organic dye
ActiveCN109701518AEasy to prepareHigh photocatalytic degradation activityWater/sewage treatment by irradiationWater contaminantsOrganic dyePhotocatalytic degradation
The invention discloses a composite photocatalyst, a preparation method thereof, and an application of the catalyst in the degradation of an organic dye. A BiVO4 / Bi4V2O11 composite material is synthesized by a simple and stable hydrothermal process, and in-situ photoreduction of AgNO3 is carried out in the photocatalytic degradation process of a dye rhodamine B to obtain the Ag / BiVO4 / Bi4V2O11 composite photocatalyst to enhance the photocatalytic degradation activity. The crystal shape, the morphology and the specific surface area of the composite photocatalyst are studied by XRD, SEM and BETrespectively, and capture experiments prove the active species playing a role in degradation in the photocatalytic degradation process, so a strong proof basis is provided for the degradation of theRhB. The Ag / BiVO4 / Bi4V2O11 composite photocatalyst of the invention has a simple preparation method and a high photocatalytic activity, and opens up a new way for the catalytic degradation of organicdyes.
Owner:HUBEI NORMAL UNIV
Photocatalyst as well as preparation method and application thereof
ActiveCN111790388ALarge specific surface areaNovel structureWater/sewage treatment by irradiationWater treatment compoundsHeterojunctionPtru catalyst
The invention discloses a photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalysis. The preparation method comprises the following steps: dipping and depositing NH2-MIL-125 (Ti) in a cobalt ion solution, and burning to obtain the sponge three-dimensional CoTiO3 / C-TiO2 II type heterojunction photocatalyst. The three-dimensional CoTiO3 / C-TiO2 II type heterojunction photocatalyst not only has a very large specific surface area and can provide more reaction active sites for catalytic reaction, but also introduces a carbon source toenhance the light absorption. The photo-generated charge transfer type of CoTiO3 / TiO2 is changed from I type to II type, the compounding of photo-generated charges is effectively inhibited, and the photocatalytic degradation activity of titanium dioxide is greatly improved. The preparation method of the photocatalyst is simple, the obtained photocatalyst is novel in structure, efficient photocatalytic activity and good stability for antibiotic degradation are shown under the action of visible light, and the actual application prospect of the titanium dioxide photocatalyst is greatly improved.
Owner:GUANGZHOU UNIVERSITY
CdS quantum dot modified bismuth composite material as well as preparation method and application thereof
ActiveCN113877610AEasy to separateHigh photocatalytic degradation activityPhysical/chemical process catalystsWater/sewage treatment by irradiationHeterojunctionMicrosphere
The invention discloses a CdS quantum dot modified bismuth composite material as well as a preparation method and application thereof, and belongs to the technical field of visible light catalytic material research and environmental pollutant degradation. The preparation method comprises the following steps: firstly, preparing Bi2MoO6 / BiOCl nano microspheres from Bi(NO3)3.5H2O and Na2MoO4.2H2O by virtue of ultrasonic treatment, and then fixing CdS quantum dots on the surface of BiOCl / Bi2MoO6 so as to obtain a target product Bi2MoO6 / BiOCl / CdS composite material. The composite material is a double II-type heterojunction, and realizes rapid transfer of photo-induced electrons; and the composite material has photocatalytic degradation performance, and has good degradation performance on ciprofloxacin under visible light, and the degradation performance is obviously higher than that of independent BiOCl, Bi2MoO6 and CdS.
Owner:广西北投环保水务集团有限公司
Magnetically Retrievable Neodymium Complexes /go/fe 3 o 4 Ternary compound and its preparation method and application
ActiveCN109806912BEfficient degradationPromote degradationWater/sewage treatment by irradiationOrganic-compounds/hydrides/coordination-complexes catalystsTernary complexMethyl blue
Owner:SHANXI UNIV
Carbon-coated carbon nitride nanowires and its preparation method and application of photocatalytic degradation of bisphenol-a
ActiveCN111672531BEasy to prepareEasy to separateWater/sewage treatment by irradiationWater treatment compoundsNanowireSpectral response
The invention provides a carbon-coated carbon nitride nanowire, a preparation method thereof and an application of photocatalytic degradation of bisphenol A. The preparation method comprises: adding polyethylene glycol-polypropylene glycol-polyethylene glycol tri-block copolymer into water, adding nitric acid under stirring conditions, and waiting for polyethylene glycol-polypropylene glycol-polyethylene glycol tri-block copolymerization After the substance dissolves, add dicyandiamide and continue to stir to obtain a mixed solution; move it to a reactor for hydrothermal reaction, and freeze-dry the product to obtain a carbon-coated carbon nitride nanowire precursor; carbon-coated nitrogen The precursor of carbonized carbon nanowires is calcined at high temperature to obtain carbon-coated carbon nitride nanowires. The carbon-coated carbon nitride nanowire has a three-dimensional network structure, and the diameter of the nanowire is 50-100 nm, which has strong mechanical strength; it is applied to photocatalytic degradation of bisphenol A, and has high photocatalytic degradation activity, which is different from simple Compared with carbon nitride, the specific surface area is significantly increased, the spectral response range is greatly expanded, and the degradation rate is significantly improved.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Nano titanium dioxide photocatalyst with double particle size distribution and preparation method thereof
ActiveCN106607015BEasy to recycleGuaranteed decentralizationPhysical/chemical process catalystsWater/sewage treatment by irradiationHigh activityPhotocatalytic degradation
The invention provides a nanometer titanium dioxide photocatalyst with dual particle size distribution and a preparation method thereof, which includes dissolving organic titanate in an alcohol solution, adding dropwise an aqueous solution of polyacrylic acid and polyvinylpyrrolidone under stirring to prepare a transparent titanium dioxide sol; Commercial nanometer titanium dioxide powder is added and ultrasonic stirred to obtain a transparent to translucent titanium dioxide colloid; finally, spray drying is performed to obtain the nanometer titanium dioxide photocatalyst with dual particle size distribution of the present invention. The titanium dioxide photocatalyst prepared by the present invention does not need to add any surfactant and dispersant during use. A highly stable nano titanium dioxide photocatalyst spray liquid can be prepared by adding water and stirring, and can be stably placed for more than 6 months; the catalyst can be stored in the sun for more than 6 months. It has high activity in photocatalytic degradation of organic matter under light, and its degradation rate is more than 40% higher than that of existing commercial nanometer titanium dioxide P25.
Owner:广州市逸都环保科技有限公司
Preparation method of color-tunable titanium dioxide with high photocatalytic activity
The invention discloses a preparation method of titanium dioxide with adjustable colors and efficient photocatalytic activity, belongs to the technical field of chemistry and material science, and solves the technical problems that in the prior art, the preparation method of visible-light response titanium dioxide is high in cost, complicated in steps, and poor in stability, and furthermore the prepared titanium dioxide is not adjustable in color, and low in catalytic activity. The preparation method disclosed by the invention comprises the following steps: uniformly mixing a metal hydride with titanium dioxide to obtain a mixture; under the protection of an inert gas, performing a solid-phase reaction on the mixture at 200-400 DEG C, and obtaining the titanium dioxide with adjustable colors from light gray to blue and black finally. The preparation method is simple, controllable, low in cost, and convenient for mass production; in the meantime, the prepared titanium dioxide is adjustable in colors, stable in physicochemical property and high in photocatalytic activity, and can be widely applied to the fields of self-cleaning coatings, paints, coatings, photocatalysis, solar cells and the like.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
A kind of two-dimensional titanium dioxide crystal form, sol and preparation method thereof
ActiveCN108892167BHigh photocatalytic degradation activityStrong photocatalytic degradation activityPhysical/chemical process catalystsWater/sewage treatment by irradiationSingle crystalCatalytic effect
The crystal form of a two-dimensional titanium dioxide sol has a diffraction angle 2θ of 8.78 o ,26.66 o ,38.80 o ,46.75 o ,58.07 o There are diffraction peaks. The present invention is a crystal form in which a single crystal is square and stacked into a two-dimensional nanosheet structure. It has a large specific surface area and is particularly suitable for the preparation of composite materials. This product has strong catalytic activity and has relatively good effects on various dyes, organic pollutants, feces, etc. The photocatalytic degradation activity is large, especially the degradation rate of methyl orange can be as high as 80.6% in 3 hours. The present invention successfully expands the photoresponse range of titanium dioxide to the visible light region without doping, thereby improving the product activity. The present invention solves the problem of acid and alkali pollution in the past preparation process. No corrosive reagents are used in the preparation process, and there is no secondary pollution to the environment. The product has good stability and still has a strong catalytic effect when left at room temperature for 8 months. The preparation process is simple and feasible, and it is easy to realize industrial production.
Owner:CHONGQING JIAOTONG UNIVERSITY
A kind of composite photocatalyst and its preparation method and the application of this catalyst in degrading organic dye
ActiveCN109701518BEasy to prepareHigh photocatalytic degradation activityWater/sewage treatment by irradiationWater contaminantsPtru catalystOrganic dye
The invention discloses a composite photocatalyst, a preparation method thereof, and an application of the catalyst in degrading organic dyes. The invention first adopts a simple and stable hydrothermal method to synthesize BiVO 4 / Bi 4 V 2 O 11 Composites followed by in situ photoreduction of AgNO during photocatalytic degradation of the dye Rhodamine B 3 Get Ag / BiVO 4 / Bi 4 V 2 O 11 composite photocatalyst to enhance the photocatalytic degradation activity; the present invention studies the crystal shape, morphology and specific surface area of the composite photocatalyst through XRD, SEM and BET, and the capture experiment proves that the photocatalytic degradation process plays an important role in the degradation process. Active species for degradation, providing strong evidence for the degradation of RhB; Ag / BiVO of the present invention 4 / Bi 4 V 2 O 11 The composite photocatalyst has a simple preparation method and high photocatalytic activity, which opens up a new idea for the catalytic degradation of organic dyes.
Owner:HUBEI NORMAL UNIV
A kind of preparation method of chrysanthemum structure nanocomposite material
InactiveCN103521163BImprove adsorption capacityHigh photocatalytic degradation activityPhysical/chemical process catalystsWater/sewage treatment by irradiationVisible light photocatalyticNanocomposite
Owner:JIANGSU UNIV
Preparation method of photocatalyst capable of degrading dyestuff wastewater
PendingCN108355710AEasy to operateReaction conditions are easy to controlWater/sewage treatment by irradiationWater treatment compoundsWastewaterHydrotalcite
The invention provides a treatment technology for degrading dyestuff wastewater through photocatalysis. A visible light catalyst adopted by the treatment technology is an ion liquid modified perovskite covered hydrotalcite photocatalyst. The catalyst takes perovskite covered hydrotalcite with photocatalysis activity as a substrate; the visible light utilization rate of the substrate can be improved and ionic liquid can be used for improving the photocatalysis activity; the ionic liquid is 1-methyl-3-aminopropylhexafluorophosphate. By adopting the treatment technology provided by the invention,the problem in the prior art that the degradation efficiency of the dyestuff wastewater is low is solved and the treatment technology is suitable for degrading organic dyestuffs in a polluted water body.
Owner:牛笑天
A kind of preparation method of cu:zno/n:rgo composite photocatalyst
ActiveCN105521809BEasy to prepareGood repeatabilityPhysical/chemical process catalystsWater/sewage treatment by irradiationUltraviolet lightsP–n junction
The invention discloses a method for preparing a p-n junction type Cu:ZnO / N:rGO composite photocatalyst composed of Cu-doped ZnO nanorods and N-doped reduced graphene oxide (rGO). The catalyst is composed of N-doped reduced graphene oxide (rGO). It consists of n-type rGO coated with Cu-doped p-type ZnO nanorods. The preparation method is as follows: first use a hydrothermal method to prepare Cu-doped ZnO nanorods, and then assemble them with graphene oxide (GO) using a hydrothermal reduction method to form a Cu:ZnO / rGO composite photocatalyst. Finally, Cu :ZnO / rGO is annealed in an NH3 atmosphere and doped with N to obtain a Cu:ZnO / N:rGO composite photocatalyst. The photocatalyst prepared by this method has high photocatalytic activity under ultraviolet light, and can inhibit the photocorrosion phenomenon of ZnO, greatly improving the stability of the catalyst, and has important potential application value in the field of sewage treatment.
Owner:ZHEJIANG UNIV
fe-tio 2 nanotube/g-c 3 no 4 Composite materials and their preparation methods and applications
ActiveCN108940343BIncreased propagation ratePromote absorptionPhysical/chemical process catalystsWater/sewage treatment by irradiationSewageSewage treatment
The invention provides a FeTiO 2 Nanotube / g‑C 3 N 4 Composite material and its preparation method and application, the present invention has prepared Fe TiO with high photocatalytic activity at low cost with a simple process 2 Nanotube / g‑C 3 N 4 Composite materials, by controlling the reaction conditions, one-step preparation of homogeneous Fe‑TiO at lower hydrothermal temperature 2 nanotubes, by controlling the TiO 2 FeTiO with controllable tube length and tube diameter can be obtained 2 Uniform nanotubes; and the preparation of composite materials avoids high-temperature heating, and Fe-TiO 2 Nanotubes and g‑C 3 N 4 The composite material can effectively degrade the refractory toxic pollutants in sewage, and also has a good hydrogen production effect, and has a good application prospect in the fields of sewage treatment and energy.
Owner:HEBEI NORMAL UNIV
A kind of znsn(oh)6 powder and its preparation method and application
ActiveCN106564935BHigh photocatalytic degradation activityImprove photocatalytic efficiencyTin compoundsWater/sewage treatment by irradiationSpace groupUltraviolet lights
The invention discloses a ZnSn(OH)<6> powder, and a preparation method and application thereof. According to the preparation method, Zn(NO<3>)<2>.6H<2>O is dissolved into a glycol solution; SnCl<4>.5H<2>O is dissolved into an aqueous solution; the two solutions are mixed to obtain a precursor solution; the pH value of the precursor solution is adjusted with hydrazine hydrate; and the cubic phase ZnSn(OH)<6> powder of a space group structure being Pn-3m. The preparation method is simple in procedure and easy to operate, the reaction time is short, and the reaction condition is mild. After the synthesized ZnSn(OH)<6> powder is irradiated by ultraviolet light for 30 min, the degradation rate of the ZnSn(OH)<6> powder to Rhodamine B (RhB) reaches up to 87%. The ZnSn(OH)<6> powder has good application prospects.
Owner:SHAANXI UNIV OF SCI & TECH
An environmentally friendly interior wall coating prepared from waste powder of optical fiber preform rods
The invention discloses an environment-friendly interior wall coating with waste generated during production of optical fibers as a base material. The environment-friendly interior wall coating is prepared from, by weight, 40-50 parts of pretreated optical fiber performing bar waste powder, 15-20 parts of quartz sand, 12-15 parts of wollastonite powder, 10-15 parts of dispersible latex powder, 1.5-2.5 parts of nanometer titania, 2-3 parts of starch ether and 8-15 parts of titanium oxide pigment, wherein the optical fiber performing bar waste powder is calcined for 20-60 min at 500-700 DEG C tobe pretreated, and TiO2 with visible-light photocatalytic activity is adopted for nanometer titania. The environment-friendly interior wall coating has the advantages of being capable of purifying air, good in paint film performance, small in construction difficulty and the like, and the problems that the environment is polluted when optical fiber waste is thrown about and an interior wall coating does not have functionality and environment protection performance simultaneously are greatly solved.
Owner:WUHAN UNIV OF SCI & TECH
Preparation method for nitrogen and carbon co-doped nanometer titanium dioxide visible-light photocatalyst
InactiveCN102600881BGood dispersionGood suspensionPhysical/chemical process catalystsWater/sewage treatment by irradiationPhotocatalytic degradationMaterials science
The invention relates to a preparation method for nitrogen and carbon co-doped nanometer titanium dioxide visible-light photocatalyst. The preparation method comprises the steps of: taking and adding glacial acetic acid into a container, adding anhydrous ethanol solution of tetrabutyl titanate while agitating to prepare precursor solution, adding the precursor solution into a reaction device, keeping temperature to be 0-20 DEG C, adding ammonium carbonate super-saturated solution while agitating, forming gel after a great amount of white sediment appears, aging and drying to obtain titanium dioxide gel; and heating the titanium dioxide gel at program-controlled temperature in an atmosphere of flowing air, roasting for 1-3h at low temperature and cooling to room temperature to obtain the nitrogen and carbon co-doped nanometer titanium dioxide visible-light photocatalyst. Since conventional equipment and common raw materials are used in the method, the cost is low, the preparation process is simple and the large-scale industrialized production is easy to realize. The prepared photocatalyst particles are even, the grain size is small, the specific surface area is large, the photocatalyst shows high-efficiency photocatalyst degradation activity under the irradiation of visible light, and the degradation rate of rhodamine B within 90min reaches more than 91 percent.
Owner:HENAN POLYTECHNIC UNIV
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