37results about How to "Suitable for expanding production requirements" patented technology

The invention provides a preparation method of a cerium oxide / graphene quantum dot / graphene-like carbon nitride composite photocatalytic material. The composite photocatalytic material is formed by inlaying cerium oxide in a graphene-like carbon nitride layered structure, and loading nitrogen-doped graphene quantum dots on the graphene-like carbon nitride. According to the preparation method of the cerium oxide / graphene quantum dot / graphene-like carbon nitride composite photocatalytic material, the photoresponse scope of the graphene-like carbon nitride is extended by doping the nitrogen-doped graphene quantum dots, and the composite photocatalytic material has high-efficiency photocatalysis activity by using rapid photo-generated electron-hole separating effect and electron transfer ability among the nitrogen-doped graphene quantum dots, the cerium oxide and the graphene-like carbon nitride.

The invention provides a thorium coordination polymer, its preparation method and its application in propyne storage. The chemical formula of the thorium coordination polymer is [Th 6 o 4 (OH) 4 (C 14 h 4 f 4 o 4 ) 6 (H 2 O) 6 ], C 14 h 4 f 4 o 4 It is the molecular formula of 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid with two carboxyl protons removed. It belongs to the cubic crystal system and the space group is Fm‑ 3m ; the unit cell parameter is a =28~28.1 Angstroms, b =28~28.1 Angstroms, c =28~28.1 Angstroms, =90º, =90º, =90º, Z =4. The preparation method of the thorium coordination polymer comprises the following steps: mixing thorium salt, 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid, nitric acid and solvent, and then transferring to a reaction kettle , and then react under the condition of 358~373 K to obtain the thorium coordination polymer. The thorium coordination polymer can be used to store propyne gas.

The invention provides an electrocatalytic coupling advanced oxidation system. The system can degrade organic pollutants into carbon dioxide and the carbon dioxide is synchronously electrocatalytically reduced to a hydrocarbon. In the catalytic system, three-dimensional hexagram-shaped Co3O4 and nano-sheet stack flower-shaped CuO are respectively used as an anode material and a cathode material, and the two electrode materials are prepared by a solvothermal method. In the three-electrode system electro-catalytic process, the Co3O4 electro-anode can thoroughly mineralize p-nitrophenol to CO2 and H2O, and the CuO electro-cathode can synchronously reduce the generated carbon dioxide into the useful hydrocarbon. When the additionally-applied bias voltage is 0.8V vs Ag / AgCl, the material has anoptimal catalytic effect, the removal rate of the p-nitrophenol can reach 98% or more, and the yields of methanol and ethanol reach 49.145 micromol / L / h and 20.475 micromol / L / h, respectively.

The invention relates to the field of materials, in particular to a copper-containing zinc oxide / graphene quantum dot catalyst and a preparation method. By preparing metal copper (Cu) nanoparticles doped ZnO composite film, the separation rate of photogenerated electrons and holes can be improved, and the photocatalytic performance can be improved. At the same time, GQDs aqueous solution is spin-coated on the surface of the composite film to prepare The copper-containing zinc oxide / graphene quantum dot dual semiconductor catalyst system can not only effectively prevent the photocorrosion of ZnO, but also use GQDs as semiconductors to generate electron-hole pairs by themselves under the excitation of ultraviolet light, thereby providing more The highly active free radicals are conducive to the degradation of organic matter.

The invention relates to a material CdS / Ba0.4Sr0.6TiO3 for producing hydrogen by photocatalytically decomposing water, which is a heterostructure catalyst formed by supporting CdS onto Ba0.4Sr0.6TiO3. The catalyst is prepared by a one-step hydrothermal process. When the mole ratio of the CdS to the Ba0.4Sr0.6TiO3 is 0.4:1, the expression is 40%CdS / Ba0.4Sr0.6TiO3, and the material has the optimal catalytic effect. Under simulated sunlight, by using Na2S / Na2SO3 as a sacrifice reagent, the hydrogen production efficiency by photocatalytically decomposing water of the 40%CdS / Ba0.4Sr0.6TiO3 is up to 1268.4 mu mol.h<-1>.g<-1> under the condition of no noble metal for cocatalysis. The one-step hydrothermal process is directly used for synthesizing the catalyst, is simple to operate, has the advantages of low production cost, higher synthesis yield, higher purity and favorable repetitiveness, and is suitable for the requirement for scale-up production; the catalyst has high stability and is convenient for reutilization; and the catalyst has very high photocatalytic hydrogen production ratio under simulated sunlight.

Disclosed is ternary neterogeny structural light degradation organic matter catalyst 5% TiO2-Bi2MoO6 / Bi3.64Mo0.36O6.55, which consists titanium dioxide (TiO2) and two types of dibismuth trimolybdenum dodecaoxide (Bi2MoO6 and Bi3.64Mo0.36O6.55) with different structures, wherein the titanium dioxide is 5% of total mole number of bismuth elements. The ternary neterogeny structural light degradationorganic matter catalyst 5% TiO2-Bi2MoO6 / Bi3.64Mo0.36O6.55 has the advantages that the catalyst is the ternary neterogeny structural light degradation organic matter catalyst reported for the first time; 2, the catalyst is directly synthesized by a one-step hydrothermal method, is simple in operation, low in production cost, high in synthesis yield and purity, fine in repeatability, and meets requirements of batch production; 3, the catalyst is fine in thermal stability and is high in acid resistance and alkali resistance; and 4, the catalyst has a good photocatalytic degradation organic effect, and has a higher catalysis effect as compared with single titanium dioxide, dibismuth trimolybdenum dodecaoxide (Bi2MoO6 and Bi3.64Mo0.36O6.55) and an optional combination (TiO2-Bi2MoO6, TiO2-Bi3.64Mo0.36O6.55 and Bi2MoO6 / Bi3.64Mo0.36O6.55) among the single titanium dioxide and the dibismuth trimolybdenum dodecaoxide (Bi2MoO6 and Bi3.64Mo0.36O6.55).

The invention provides a terbium coordination polymer for separating propyne / propylene mixed gas and a preparation method thereof. The chemical formula of the terbium coordination polymer is [Tb 2 ·(O 2 C‑C 6 h 2 f 2 -C 6 h 2 f 2 ‑CO 2 ) 3 ·H 2 O](O 2 C‑C 6 h 2 f 2 -C 6 h 2 f 2 ‑CO 2 Represents 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid), belongs to the tetragonal crystal system, and the space group is P4 1 22; Unit cell parameters are α=90°, β=90°, γ=90°, Z=4. The preparation method of the terbium coordination polymer comprises the following steps: mixing terbium salt, 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid and o-fluorobenzoic acid, and then putting them into a container in a reaction kettle with an organic solvent, and react at 358-373K to obtain the terbium coordination polymer. The terbium coordination polymer can be used to separate propyne / propylene mixed gas.

The invention provides a cerium oxide, graphene quantum dots and graphene-like phase carbon nitride composite photoactivate material and a preparation method thereof. The composite photoactivate material is formed by embedding cerium oxide into a graphene-like phase carbon nitride layer structure and loading the nitrogen-doped graphene quantum dots onto graphene-like phase carbon nitride. According to the composite photoactivate material, by use of doping of the nitrogen-doped graphene quantum dots, the photoresponse range of the graphene-like phase carbon nitride is expanded; through the quick photoproduction electron and hole separation effect and the electronic migration capability among the nitrogen-doped graphene quantum dots, cerium oxide and graphene-like phase carbon nitride, the composite photoactivate material has an efficient photocatalytic activity.

The invention aims at the problem of low catalytic efficiency of visible light catalysis of single two-dimensional molybdenum disulfide, provides a simple preparation method of molybdenum disulfide / tin niobate composite nanomaterial, is mainly used in the technology of hydrogen production realized through photocatalytic decomposition of water, and belongs to the technical field of composites and the field of clean energy. The MoS2 / SnNb2O6 composite is prepared by weighing and dissolving SnNb2O6 in deionized water, magnetically stirring for the first time, conducting ultrasonic dispersion, weighing sodium molybdate dihydrate and thiourea again, dissolving the sodium molybdate dihydrate and the thiourea into the solution, magnetically stirring for the second time, transferring a reaction liquid into a reaction kettle after the reactants are evenly mixed, putting the reaction kettle into an oven, conducting a hydrothermal reaction, centrifuging after naturally cooling to a room temperature, washing with water and washing with alcohol for a plurality of times, and drying, wherein a liner of the reaction kettle is made of teflon. The sheet MoS2 is dispersed on an SNO nanosheet.

A photocatalytic water splitting hydrogen production material CdS / Ba0.9Zn0.1TiO3 is a catalyst with a heterostructure formed by enabling CdS to be loaded to Ba0.9Zn0.1TiO3 , and the catalyst is obtained by a hydrothermal sol-gel process. When the molar ratio of CdS and Ba0.9Zn0.1TiO3 is 1:5, the expression is 20%CdS / Ba0.9Zn0.1TiO3 , and the catalytic effect of the material is optimal. Under the exposure of a xenon lamp of 300 watts, Na2S / Na2SO3 serves as a sacrifice reagent. The photocatalytic water splitting hydrogen production material CdS / Ba0.9Zn0.1TiO3 has the advantages that the catalyst is directly synthesized in a hydrothermal sol-gel process and is simple in operate, low in production cost, high in synthesis yield, extremely high in purity, good in repeatability and suitable for the requirements of expanded production; the catalyst is good in stability and convenient to recycle; and the catalyst is high in photocatalysis hydrogen production efficiency.

A photocatalytic decomposing water hydrogen production material CdS / Sr1.6Zn0.4Nb2O7 is a catalyst having a heterojunction structure formed by loading CdS on Sr1.6Zn0.4Nb2O7. The inventive catalyst is prepared by a hydrothermal method through sol gel. When a molar ratio of the CdS and the Sr1.6Zn0.4Nb2O7 is 3:7, the expression is 30%CdS / Sr1.6Zn0.4Nb2O7, and the catalytic effect of the material is best. Under the illumination of a 300 watt xenon lamp, Na2S / Na2SO3 is taken as a sacrifice reagent, the inventive material 30%CdS / Sr1.6Zn0.4Nb2O7 photocatalyzes and decomposes the water to produce the hydrogen without a co-catalyst of noble metal, and the efficiency is 645.7 mu mol.h<-1>.g<-1>. The photocatalytic decomposing water hydrogen production material of the invention has the advantages that: 1 the inventive catalyst is directly synthesized by the hydrothermal method through sol gel, the operation is simple, the production cost is low, the synthetic yield is higher, the purity is high and the repeatability is good, and the inventive catalyst is suitable for the demand of magnification production; 2, the inventive catalyst is good in the stability and is easy to reuse; and 3, the inventive catalyst has higher photocatalytic hydrogen production efficiency.

The invention discloses a method for preparing a graphene quantum dot / vanadium-doped mesoporous titanium dioxide composite photocatalyst. The catalyst of the invention is composed of graphene quantum dots and vanadium-doped mesoporous titanium dioxide microspheres obtained by solvothermal heat. Under simulated sunlight, the catalyst not only effectively mineralized methylene blue into CO2 and H2O, but also reduced the carbon dioxide produced by its catalytic oxidation to useful hydrocarbons. The advantages of the present invention are: 1. The doping of vanadium reduces the bandgap width of titanium dioxide, thereby improving its response range under visible light; 2. At the same time, the photosensitization and super-strong electron conduction of graphene quantum dots are utilized ability, which not only inhibits the recombination of photogenerated electrons and holes, but also improves the utilization rate of light; 3, the material of the present invention is cheap and easy to obtain, the synthesis method is simple, the synthesis yield and purity are high, and the experiment repeatability is good, suitable for Expanded production requirements.