61results about How to "High redox activity" patented technology

The invention discloses a CoNiFe-LDH / multilayer graphene high-performance composite energy storage material and a preparation method thereof. the preparation method comprises the steps of: measuring DMF and distilled water with a volume ratio of 8:2, and mixing the DMF and the distilled water to serve as a mixed solvent; adding expanded graphite into the mixed solvent, carrying out ultrasonic processing on the solution for 2 to 4 hours to obtain a multi-layer graphene mixed solution; adding cobalt acetate tetrahydrate, ferrous chloride tetrahydrate, nickel chloride hexahydrate and anhydrous sodium acetate into the mixed solution, stirring the solution for 5 to 10 minutes, pouring the solution into a hydrothermal reaction kettle, maintaining the temperature of the solution at 120 DEG C for1 hour, and then cooling the solution to room temperature; taking out a reactant and centrifugally washing the reactant with alcohol and water for three times, and drying the reactant in a 60 DEG C oven for 24 hours to obtain a dry CoNiFe-LDH / multilayer graphene composite material. According to the CoNiFe-LDH / multilayer graphene high-performance composite energy storage material and the preparation method thereof, a method of complexing metal by means of organic molecules is adopted for preparing laminar multi-element metal hydroxide ont eh surface of multilayer graphene which does not containoxygen functional groups, and the process is simple and suitable for production.

The invention relates to a nitrogen-doped graphene / nano titanium dioxide photocatalyst as well as a preparation method and application thereof. The nitrogen-doped graphene / nano titanium dioxide photocatalyst contains nitrogen-doped graphene, and titanium dioxide supported to the nitrogen-doped graphene, wherein the nitrogen-doped graphene contains a nitrogen source; the nitrogen source comprises graphite nitrogen and pyrrole nitrogen; and a mass ratio of the nitrogen-doped graphene to titanium dioxide is (0.005-0.05):1, preferably (0.01-0.02):1.

A problem to be solved by the invention is to provide a production method of a nitrogen-containing carbon alloy that has sufficiently high redox activity or has a large number of reaction electrons of redox reaction. A method for producing a nitrogen-containing carbon alloy comprising baking a precursor containing a nitrogen-containing organic compound and an inorganic metal salt containing one or more kinds of Fe, Co, Ni, Mn and Cr, wherein: the precursor satisfies one of the requirements (a) and (b) below, and, the nitrogen-containing organic compound is one of a compound represented by the formula (1) below, a tautomer of the compound, and a salt and hydrate thereof: (a) the precursor contains the inorganic metal salt in an amount exceeding 45% by mass based on the total amount of the nitrogen-containing organic compound and the inorganic metal salt of the precursor, in which the total amount includes the mass of hydrated water in the nitrogen-containing organic compound and the inorganic metal salt, and the amount of the inorganic metal salt includes the mass of hydrated water in the inorganic metal, (b) the precursor further contains a β-diketone metal complex:

The invention provides a high-voltage composite spinel-coated positive electrode material and a preparation method thereof. The positive electrode material comprises a lithium cobalt oxide core, a spinel-type lithium nickel manganese oxide middle layer and a solid electrolyte surface layer. The invention provides a positive electrode material with a composite coating layer on the surface, and the coating layer has good lithium ion conductivity, so that the positive electrode material is high in discharge capacity and excellent in cycle life under a high voltage without influencing a discharge platform, the volume energy density of a lithium ion battery is improved, and the corrosion of HF to the surface layer of the material can be reduced; and the high-temperature cycle life of the material is prolonged, so that the defects of unstable use structure of the positive electrode material under high charging cut-off voltage or poor cycle performance and low discharge capacity even if the structure is stable in the prior art are overcome, the high-temperature cycle performance is improved, and the material is more suitable for the actual use working condition of the material.

Monolayer protected nanoclusters (MPCs) are described herein. The MPCs contain a cluster of atoms or molecules (e.g. core) having bound thereto a plurality of ligands (e.g., monolayer). The ligands can be bound covalently or semi-covalently bound to the cluster. The ligands are generally in the form of a monolayer or mixed monolayer. The monolayer or mixed monolayer contains a plurality of ligands. In one embodiment, the monolayer and / or mixed monolayer contains 1,4-dithiolate ligands. The MPCs described herein exhibit improved quantum efficiency allowing for single cluster emissions to be measured. Moreover, some embodiments of the MPCs described herein exhibit enhanced redox activity, including the ability to transfer a plurality of electrons, i.e., up to about 19 or up to about 30 electrons under controlled conditions, while displaying improved overall chemical stability. Such behavior can be utilized in catalysis and nanoelectronics applications.

The invention relates to the technical field of preparation of functional nano anticorrosion composites of waterborne anticorrosion coating materials, in particular to a preparation method and application of ternary nano composite of reduced graphene oxide, iron(II,III) oxide and polyaniline. Graphene oxide, iron(II,III) oxide and aniline are subjected to reduction reaction and oxidative polymerization to form a nano composite having electron transfer mutual reaction among ternary interfaces; the feeding mass ratio of graphene oxide, iron(II,III) oxide and aniline is 3:(4-7):(6-24). After theconstructed ternary nano composite is used to fill waterborne coating resin to prepare waterborne nano coatings, it is discovered that the waterborne coatings are better in corrosion resistance than those filled with no nano composite. The ternary nano composite has efficient corrosion resistance, efficient barrier performance and metal surface passivating function.

The invention relates to a preparation method of Ni (OH) 2 / multilayer graphene composite material. The lamellar Ni (OH) 2 has large specific capacitance, but its conductivity is poor. If it is used asthe electrode material of supercapacitor alone, it will cause the internal resistance of the electrode to be large, the rate performance and cycle performance to be poor and so on. The invention provides a preparation method of a simple Ni (OH) 2 / multilayer graphene composite material, wherein in the graphene / metal hydroxide composite material, the excellent cycle stability of the graphene and the high capacity of the metal hydroxide are greatly improved. The supercapacitor with high performance is obtained when the composite material is used as electrode material of supercapacitor.

The invention belongs to the technical field of preparation of catalyst for oxidization of ammonia and relates to a catalyst for selective catalytic oxidization of ammonia into pollution-free N2 and water and a preparation method thereof. The method is characterized in that: adding CeOx serving as an assistant into TiO2 solid powder by an impregnation process; and loading Cu serving as an active component of the catalyst by using urine as a precipitator and by using a homogeneous precipitation process, wherein the molar ratio of Ce to Ti in the catalyst is 1 / 50 to 1 / 5, and based on the weightof the catalyst, the weight content of Cu serving as the active component of the catalyst is 1 to 30 percent. The Cu / CeOx-TiO2 composite catalyst disclosed by the invention has high low-temperature activity and high N2 selectivity, can completely convert ammonia at 250 DEG C, has a N2 selectivity of up to 95 percent, and can effectively solve the problem of discharging ammonia-containing waste gases in plants.

The invention belongs to the technical field of preparation of functional composite electrodes and discloses a bisphenol A electro-polymerized film functional carbon nanotube / cadmium sulfide composite electrode as well as a preparation method and application thereof. The bisphenol A electro-polymerized film functional carbon nanotube / cadmium sulfide composite electrode is prepared by taking a single-walled carbon nanotube / cadmium sulfide electrode as a photo-anode, a titanium electrode as a counter electrode and a saturated calomel electrode as a reference electrode, and electro-polymerizing bisphenol A on the carbon nanotube / cadmium sulfide composite electrode under visible radiation through applying a continuous differential pulse voltammetry. The preparation method has the advantages of simplicity and convenience for operation, high controllability, low cost, environment protection and the like, and the prepared electrode has good oxidation-reduction activity, cooperatively enhanced light sensitivity and photosensitive conductivity.

The invention provides a method for processing organic wastewater by using a MnOX / Fe0 nano composite material to activate persulfate. The method comprises the following steps: pulverizing natural manganese ore and calcining the material to obtain mineral powder containing an active component MnOx, fully mixing the iron salt and the mineral powder containing the active component MnOx, and then adding a reducing agent to carry out a reduction reaction to obtain the MnOX / Fe0 nano composite material; adding the obtained MnOX / Fe0 nano composite material and persulfate to the organic wastewater, andprocessing the organic wastewater under stirring condition. The method for processing the organic wastewater by using the MnOX / Fe0 nano composite material to activate persulfate can perform catalyticdegradation on various organic substances in organic wastewater, and has high purification efficiency, simple method, and easy operation, few types of reagents required, and the cost is low.

The invention discloses a preparation method of a prism copper oxide-zinc oxide catalyst. The preparation method of the prism copper oxide-zinc oxide catalyst comprises the following steps of dissolving zinc acetate dehydrate into absolute ethyl alcohol, then uniformly mixing the dissolved zinc acetate dehydrate with hexamethylenetetramine aqueous solution, then adding in polyethylpyrrolidone K-30, performing ultrasonic treatment for hydrothermal reaction to prepare prism zinc oxide carrier powder; adding the prism zinc oxide carrier powder into deionized water for ultrasonic dispersion, thendropwise stirring in copper nitrate solution and PH buffer solution with the pH kept to be 8.0-9.0, then ageing the mixture at room temperature, performing centrifugal separation and washing the mixture to be neutral, and drying and calcining the mixture to obtain the prism copper oxide-zinc oxide catalyst. The prepared prism copper oxide-zinc oxide catalyst has selectively exposed crystal surfaces and has the advantages of being orderly in morphology, good in product dispersion and high in redox activity, thereby significantly improving the hydrogen production performance during water-gas shift.

The invention relates to a preparation method and application of a high-density HATN@MXene flexible self-supporting thin film electrode. The preparation method comprises the following steps of preparing nanorod-shaped HATN through dehydration condensation; preparing MXene nanosheet dispersion liquid; then, adding the nanorod-shaped HATN into the MXene nanosheet dispersion liquid, and obtaining a mixed dispersion solution under the ultrasonic action; and finally, carrying out vacuum suction filtration to obtain the high-density HATN@MXene flexible self-supporting film electrode. The preparation process is simple to operate and low in cost, and a prepared film electrode has the characteristics of environmental friendliness, good flexibility, high tap density, excellent electrochemical performance and the like, and can be widely applied to the fields of aqueous batteries, supercapacitors or flexible energy storage device and the like.

The invention relates to the technical field of chemical materials. The invention discloses a preparation method of a platinum-based ordered alloy, and particularly discloses a preparation method of asub-nano platinum-based ordered alloy. The preparation method comprises the following steps: ultrasonically dispersing multiwalled carbon nanotubes and a nitrogen source into a hydrochloric acid solution to obtain a mixed solution, adding a non-noble metal precursor solution into the mixed solution, adding an initiator in the stirring process, drying, and calcining in an inert gas atmosphere to obtain non-noble metal nitrogen-carbon single atoms; ultrasonically dispersing non-noble metal nitrogen-carbon single atoms in a hydrochloric acid solution, adding a platinum precursor, stirring for 10-14 hours, and drying to obtain an alloy precursor; and pyrolyzing the alloy precursor in a hydrogen atmosphere to obtain the sub-nano platinum-based alloy redox catalyst. In the patent, non-noble metal single atoms and a carbon-nitrogen layer on the surface are used for limiting the range, and the non-noble metal single atoms have high stability and dispersity, so that aggregation, migration andgrowth of Pt particles can be well avoided, and the Pt alloy with small particles and uniform dispersion is obtained.

The invention discloses a Zr-Cu-based amorphous alloy compound electrode material and a preparation method thereof. The material comprises an amorphous core at the middle, nano-porous copper layers ontwo sides of the core and nickel hydroxide particles on the copper layers. The amorphous core is made from copper-zirconium alloy; the widths of the tough belts and hole diameters of the nano-porouscopper layers are 50-100nm, and the thicknesses of the nano-porous copper layers are about 2-3 microns; the sizes of the deposited nickel hydroxide particles are about 200-400nm, and the loading capacities of the same are 0.3-1.0mg / cm<2>. The copper-zirconium alloy comprises 30-70% of Zr and 70-30% of Cu. According to the Zr-Cu-based amorphous alloy compound electrode material and preparation method thereof provided by the invention, the electrochemical deposition condition can be adjusted through adjusting the voltage, time, electrolyte concentration and the like of electrochemical deposition, the deposition time is relatively short, heating is not needed, and the process is visible; and the prepared compound material can be directly applied to the electrode material of the supercapacitor.

The invention provides an ultrahigh specific capacity mesoporous Co3O4 nanosheet electrode material and a preparation method thereof. The preparation method comprises the following steps that 1) foam nickel is adopted to act as the three-electrode system of a working electrode, the mixed aqueous solution of Co(NO3)2 and KCl acts as an electrolyte solution, and a Co(OH)2 nanosheet is deposited on the surface of foam nickel through constant current so that a Co(OH)2 nanosheet precursor is acquired; and 2) the Co(OH)2 nanosheet precursor acquired in the step 1) is cleaned and dried, and then high temperature annealing is performed at temperature of 350-450 DEG C so that the mesoporous Co3O4 nanosheet electrode material is acquired. According to the preparation method of the ultrahigh specific capacity mesoporous Co3O4 nanosheet electrode material, the preparation method has the characteristics of being simple in technology, green and environment-friendly and low in cost, and the acquired Co3O4 nanosheet electrode material has relatively high specific capacity.

The invention discloses a bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material as well as a preparation method and application thereof. The two-dimensional photocatalytic material includes titanium carbide nanosheets and layered bismuth molybdate supported on the titanium carbide nanosheets. The preparation method includes the following steps: preparing bulk titanium carbide; preparing the titanium carbide nanosheets by using dimethyl sulfoxide; and preparing the above two-dimensional photocatalytic material through a hydrothermal reaction. The two-dimensional photocatalytic material has the advantages of low costs, easy availability, low recombination efficiency of photoelectrons and holes, strong catalytic performance, good redox activity, and less harm to the environment, is a green and economic photocatalytic material, can be widely used to treat pollutants in the environment, and has higher use value and better application prospects; and the preparation method provided by the invention has the advantages of a simple process, convenient operation, low raw material costs, low energy consumption, short consumed time, mild easily controlled reaction conditions, greenness and environmental protection, and shows good application prospects in synthesis of functional nanomaterials.

Provided is an electronic device, such as a flash memory device and / or a write-once-read-once memory device, where the device has a polyoxometallate that is capable of providing and / or accepting one or more electrons. The polyoxometallate may have a Wells-Dawson structure and the polyoxometallate may comprise a cage and optionally one or more guests. Also provided is a method of using the memory device, the method comprising the step of providing to or accepting from the polyoxometalate one or more electrons to provide a polyoxometalate in a reduced or oxidised state.

The invention relates to a preparation method of an anti-fouling oil-water separation composite membrane, and belongs to the technical field of oil-water separation. According to the invention, polyacrylamide and polyvinylidene fluoride are used as raw materials for preparing an anti-fouling oil-water separation composite membrane; when water passes through the mesh film, due to the hydrophilic effect of polyacrylamide on the surface of the polymer film, the water spreads and extends to form a layer of water membrane; once the oil drops are immersed into the liquid-gas-solid three-phase interface on the surface of the water membrane, the membrane is converted into a liquid-liquid-solid three-phase interface, and a medium of the model is converted into water from air; when the surface of the mesh film has relatively high roughness, the oil drops have a larger underwater contact angle; therefore, the underwater oleophobic performance is achieved; the polyacrylamide is also a polymer water treatment flocculant product, can adsorb suspended particles in water, plays a role in linking and bridging among the particles, enables fine particles to form large flocs, accelerates the precipitation speed, and can effectively prevent solid impurities from adhering to the surface of the membrane, so that the flux of the membrane can be effectively increased, and the service life of the membrane can be prolonged.

The invention relates to a layered composite oxide coated positive electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing cobalt salt and M salt or oxide according to a ratio, conducting sintering to obtain a bulk phase material precursor, mixing the bulk phase material precursor with lithium salt and an additive according to a ratio, conducting sintering at a high temperature, and conducting crushing to obtain gradient-doped modified lithium cobalt oxide; ultrasonically dispersing layered protonated titanate nanosheets in a uniformly dispersed dispersion liquid containing a metal oxide, transferring the dispersion liquid to a high-pressure reaction kettle for reaction, and conducting washing after separation to obtain intercalated layered titanate; carrying out dispersion and ultrasonic treatment on the intercalated layered titanate to obtain a stripped intercalated layered titanate nanosheet colloidal solution; and adding the modified lithium cobalt oxide into the intercalated layered titanate nanosheet colloidal solution, carrying out rotary evaporation to remove the solvent, carrying out vacuum drying, and carrying out heat treatment on the dried material to form the intercalated layered titanate nanosheet-coated modified lithium cobalt oxide layered composite oxide-coated positive electrode material.

The invention provides a carbon nanotube / polyaniline composite material, a preparation method and application, and relates to the technical field of corrosion prevention of metal materials. The preparation method comprises the following steps of dispersing carbon nanotube, aniline and emulsifier into deionized water under the ultrasonic condition; adjusting the pH (potential of hydrogen) value of a mixing system, adding ammonium persulfate, and performing in-situ oxidizing and polymerizing; washing a solid-phase product by ethyl alcohol and the deionized water, drying and grinding, so as to obtain the carbon nanotube / polyaniline composite material. The prepared carbon nanotube / polyaniline composite material has the advantages that a dendritic crystal core-shell structure is formed, and the excellent electrochemical corrosion function is realized in a wide pH range; the carbon nanotube / polyaniline composite material is used as anti-corrosive filler, and has good dispersing property in the epoxy modified acrylate resin.

The invention relates to a preparation method of a three-dimensional cubic CeO2 / Mn2O3 composite photo-thermal catalyst. The preparation method comprises the following steps: preparing a mesoporous CeO2 nano cuboid; adding the mesoporous CeO2 nano cuboid, manganous chloride tetrahydrate and urea into water, and heating in a water bath to obtain a catalyst precursor; and calcining the catalyst precursor to obtain the three-dimensional cubic CeO2 / Mn2O3 composite photo-thermal catalyst. The three-dimensional cubic CeO2 / Mn2O3 composite photo-thermal catalyst prepared by the preparation method is applied to photo-thermal catalytic degradation of VOCs. The preparation method has the beneficial effects that the raw materials for preparing the three-dimensional cubic CeO2 / Mn2O3 composite photo-thermal catalyst are wide in source and easy to obtain; the volume or mass of each reactant is determined according to a reasonable ratio, so that the purity of the prepared product can be improved, and the photo-thermal catalytic degradation activity can be improved; the method has the advantages of simple operation, safety, low cost and the like.

The invention discloses a conjugated organic lithium ion battery electrode material and a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. Firstly, a compound 1 is subjected to acid hydrolysis to synthesize a compound 2, the compound 2 reacts with TFA, NaNO2, NaHCO3 and NaOH and then reacts with HCl to obtain H6-HAT, excessive lithium hydroxide is added for a reaction, and finally the derivative Li6-HAT of 1, 4, 5, 8, 9, 12-hexaazabenzophenanthrene (HAT) is obtained. When the conjugated organic electrode material Li6-HAT is used for a lithium ion battery electrode, the first specific discharge capacity reaches 1126mAh / g under the current density of 0.01 V-3V and 100mA / g; and the discharge capacity is 588.0 mAh / g after 50 cycles. The synthesized conjugated organic electrode material is novel and stable in structure and is a novel lithium ion battery electrode material.

The invention discloses a composite carbon-based counter electrode for a dye-sensitized solar cell and a preparation method thereof, and belongs to the technical field of a solar cell. A graphite carbon layer and a carbon nano-particle layer are formed in sequence on the surface of a conductive substrate; and the graphite carbon layer and the carbon nano-particle layer are combined to form a three-dimensional structure composite carbon-based counter electrode. The composite carbon-based counter electrode has higher redox activity; and when the composite carbon-based counter electrode is applied to the solar cell industry, material cost and preparation cost of the dye-sensitized solar cell can be reduced, and meanwhile, photoelectric conversion efficiency of an existing commercial platinumelectrode is realized. Compared with an existing carbon-based counter electrode, the preparation method has the advantages of low raw material, low energy consumption, short preparation period and being green and environmentally friendly, and solves the problem of poor adhesive force between a catalyst layer obtained through a conventional candle burning method and the conductive substrate and thesensitiveness problem of carbon-based flammable flame baking process parameters, thereby improving repeatability and consistency of the preparation process and facilitating large-scale preparation ofthe counter electrode.

The invention provides a lithium titanate composite negative electrode plate and a preparation method thereof. The lithium titanate composite negative electrode plate comprises a negative current collector, a graphene / polyaniline layer and a lithium titanate layer, wherein the graphene / polyaniline layer and the lithium titanate layer coat the surface of the negative current collector; the graphene / polyaniline layer is located between the lithium titanate layer and the negative current collector; and the preparation method of the lithium titanate composite negative electrode plate comprises thesteps of firstly coating the surface of the negative current collector with slurry E containing graphene and aniline, drying and then forming a substrate comprising the graphene / polyaniline layer; and coating the surface of the substrate with slurry F containing lithium titanate, drying and then forming the negative electrode plate comprising the lithium titanate layer and the graphene / polyaniline layer.