218 results about "Indium nitrate" patented technology

The invention relates to the field of synthesis of nano-materials and particularly relates to a method for synthesizing a series of Ag:ZnIn2S4 luminescent quantum dots by using a simple and rapid hydrothermal method in one step. Fluorescence is adjustable in the range of 460nm to 830nm, the fluorescent life is relatively long, and the luminescent quantum dots can be applied to water-decomposed hydrogen production under visible light. The method comprises the steps of firstly, mixing and dissolving silver nitrate, indium nitrate, zinc acetate dihydrate and L-cysteine in an aqueous solution, adjusting the pH value of the solution to 8.5 by using NaOH, adding thioacetamide into the solution, carrying out ultrasonic stirring, then, carrying out a hydrothermal reaction for 4 hours at the temperature of 110 DEG C, and carrying out centrifugal drying after the reaction ends, thereby obtaining Ag@ZnIn2S4 nanocrystals of different ratios. Proven by a photocatalytic hydrogen production experiment under the visible light, the prepared composite photocatalyst has good photocatalytic activity.

The invention discloses a preparation method and an application of a core-shell TiO2 / ZnIn2S4 composite photocatalyst. The preparation method comprises the following steps: performing ultrasonic dispersion on TiO2 in an ethanol solvent; adding zinc chloride and indium nitrate into the ethanol solvent, and stirring to dissolve; mixing the two systems, and adding thioacetamide; transferring the mixed system into a high pressure kettle to react; performing vacuum filtration, washing, drying and grinding on a product after the reaction is finished to obtain the core-shell TiO2 / ZnIn2S4 composite photocatalyst. According to the method, the core-shell TiO2 / ZnIn2S4 composite photocatalyst is prepared in one step by adopting a solvothermal synthesis method, the catalyst is wide in visible light response range and high in photocatalysis activity, is applicable to organic dye wastewater degradation, and can be used for degrading methylene blue-containing wastewater in the field of solar energy transformation and utilization and environment management.

The invention provides a preparation method for a ZnO-In2O3 nano semiconductor crystal gas sensitive material and belongs to inorganic nano semiconductor composite materials. The preparation method comprises the following steps: firstly, zinc nitrate hexahydrate (Zn(NO3)2*6H2O), 4.5 indium nitrate (In(NO3)3*9 / 2H2O) and polyvinylpyrrolidone (PVP) are used as raw materials, wherein zinc nitrate and indium nitrate are respectively used as a zinc source and an indium source; the viscosity of a solution is increased by the PVP and ethanol and N,N-dimethyl formaldehyde (DMF) are used as solvents; ZnO-In2O3 nano composite fibers are prepared by an electrostatic spinning method and a subsequent heat treatment process; secondly, the ZnO-In2O3 nano composite fibers are used as seed crystals and are subjected to heat treatment under the environment of a zinc ammonia solution; zinc oxide crystals grow on the surfaces of the ZnO-In2O3 nano composite fibers to obtain pine-branch-shaped ZnO-In2O3 nano composite materials; finally, the pine-branch-shaped ZnO-In2O3 nano composite materials are used as basic materials to assemble a gas sensitive element. The preparation method has the advantages of low energy consumption and no pollution; equipment for preparation is simple, the conditions of a reaction process are moderate and the stability is good. The ZnO-In2O3 nano semiconductor crystal gas sensitive material has a similar PN-type semiconductor heterojunction structure and has high sensitivity and short recovering time.

The invention discloses a precious metal / zinc indium sulfide / titanium dioxide nano heterostructure photocatalyst, which is characterized in that ultra-thin zinc indium sulfide nanosheets are grown on the surface of titanium dioxide nanofibers, then precious metal nanoparticles are assembled on positive and negative surfaces of the ultra-thin zinc indium sulfide nanosheets, so that precious metal / zinc indium sulfide / titanium dioxide nano heterostructure is hierarchically constructed. The preparation method includes adding glacial acetic acid, butyl titanate and polyvinylpyrrolidone into anhydrous ethanol, preparing butyl titanate / polyvinylpyrrolidone composite nanofibers by electrostatic spinning, and performing high temperature calcination to obtain titanium dioxide nanofibers; adding zinc acetate dihydrate, indium nitrate hexahydrate, cysteine and sodium hydroxide into deionized water, then adding the titanium dioxide nanofibers, and performing hydrothermal reaction to obtain zinc indium sulfide / titanium dioxide heterostructure; and activating the heterostructure in a stannous chloride aqueous solution, and then performing in-situ reduction in a precious metal brine solution. The photocatalytic material is excellent in performance of photocatalytically splitting of water into hydrogen.

The invention discloses a method for preparing battery grade indium hydroxide and indium oxide, which aims to provide the method for preparing the indium hydroxide and the indium oxide. The method ensures simple process, relatively lower cost and relatively higher product quality. In the method, refined indium solids serve as raw materials; and the method is characterized by comprising the following steps of: A, melting and water quenching, namely, performing melting and water quenching on the refined indium solids to prepare indium flowers; B, nitric acid dissolution, namely, adding a nitric acid into the indium flowers prepared by the step A to dissolve the indium flowers to obtain solution of indium nitrate; C, the neutralization and filtration of ammonia water, namely, adding the ammonia water into the solution of indium nitrate obtained by the step B for neutralization and filtration to prepare indium hydroxide filtration residues and filtrate, and separately treating the filtrate; and D, drying, powder preparation and calcination, namely, adding water into the indium hydroxide filtration residues obtained by the step C for washing and filtration to obtain filtration residues and the filtrate, separately treating the filtrate, and performing drying, powder preparation and calcination on the filtration residues to obtain the battery grade indium hydroxide and the indium oxide. The method is mainly used for preparing the high-quality indium hydroxide and the high-quality indium oxide.

The invention provides a zinc oxide / indium oxide nanometer hetero junction photocatalysis material and a method for preparing the same. The chemical formula of the photocatalysis material is ZnO / In2O3, and the mol ratio of the zinc oxide to the indium oxide is 1:5-5:1. The preparation method comprises that: (1) according to the mol ratio of 1:5-5:1, the zinc oxide and the indium oxide are mixed and completely dissolved in deinoized water to form a clear solution, ammonia water is added in the clear solution to adjust the pH value of the solution to 9, the solution is aged for 24 hours, and the zinc oxide and the indium oxide are completely deposited; and (2) the zinc oxide and the indium oxide are washed and filtered by deionized water and deposited for three times, and the deposition is dried out at a temperature of 95 DEG C and annealed at a temperature of between 600 and 1,000 DEG C. Because a coprecipitation method is utilized to combine the zinc oxide and the indium oxide to form the nanometer hetero junction material, the method has the advantages of simple process, low cost and easy mass production; the zinc oxide / indium oxide nanometer hetero junction photocatalysis material prepared by the method has larger specific surface areas and can obviously improve the separation of photogenerated carriers and enhance the photocatalysis performance of the material.

A three-dimensional ordered macroporous InVO4 visible light-responsive photocatalyst, preparation and application belong to the technical field of photoresponsive catalysts. The preparation method comprises the following steps: under a stirring condition, dissolving indium nitrate, ammonium metavanadate and a complexing agent with an equal mol ratio in a mixed solution of water, anhydrous methanol, and glycol, uniformly stirring, weighing a PMMA template, soaking in a precursor solution, performing vacuum filtration and drying at room temperature, heating from room temperature to 300 DEG C with a speed of 1-2 DEG C / min in a tubular furnace in nitrogen atmosphere, holding the temperature for 3 hours, cooling the furnace to room temperature, heating from room temperature to 500 DEG C with a speed of 1-2 DEG C / min in air atmosphere, and holding the temperature for 4 hours. The indium vanadate photocatalyst with a three-dimensional ordered macroporous structure and mesopores on pore walls has degradation efficiency on methylene blue of up to 92-98% when irradiated by visible light for 1 hour. The preparation method of the invention is simple in operation, and low in raw material price.

The invention relates to the technical field of photocatalytic hydrogen production, particularly to an AgIn5S8-ZnS quantum dot, a preparation method and uses thereof, wherein the AgIn5S8-ZnS quantum dot can be used for photocatalytic hydrogen production under visible light. The preparation method comprises: weighing silver nitrate, indium nitrate, zinc acetate and different amounts of L-cysteine,mixing and dissolving in an aqueous solution, adjusting the pH value of the solution to 8.5 with NaOH, adding thioacetamide, carrying out ultrasonic stirring, adding MPA corresponding to different amounts of L-cysteine, stirring, carrying out a hydrothermal reaction for 4 h at a temperature of 110 DEG C, and carrying out ethanol centrifugation washing drying after completing the reaction to obtainthe AgIn5S8-ZnS nanometer crystal. According to the present invention, the visible light-irradiated water decomposition hydrogen production experiment results prove that the prepared mixed ligand catalyst has good photocatalytic activity.

The invention relates to a metal organic framework material, in particular to an indium-based MOF micro-nano powder as well as a preparation method and application thereof, the indium-based MOF micro-nano powder is prepared by taking indium nitrate and carboxylic acid as reaction raw materials, and adding water or salt or the water and the salt into the reaction raw materials for reacting at 15-45DEG C especially at room temperature. The room-temperature mild preparation technology of the indium-based MOF micro-nano powder has important significance in simplifying operation, enriching classicMOF types, developing application fields and realizing industrial application.

The invention relates to a method for preparing indium vanadate nano particles, The method comprises the steps of: dissolving indium nitrate, ammonium metavanadate and hexadecyl trimethyl ammonium bromide in water, mixing according to the mol ratio of indium to vanadium of 1: (1 to 2), then adding the hexadecyl trimethyl ammonium bromide according to a mol ratio of indium to vanadium to hexadecyl trimethyl ammonium bromide of 1: (1 to 2): (0.02 to 0.05), stirring for 10 to 12h, regulating a pH value to 8 by utilizing potassium hydroxide, and filtering, washing and drying generated precipitate to obtain solid powder; and mixing the solid powder with 10mol / L of potassium hydroxide solution according to a mass ratio of 1: (25 to 50), then putting into a reactor to have hydro-thermal treatment for 8 to 24h at the temperature of 150 to 180 DEG C to obtain an indium vanadate precursor, and drying the indium vanadate precursor and then placing into a muffle furnace to be baked for 1 to 2h at the temperature of 450 to 550 DEG C and then naturally cooling to obtain the indium vanadate nano particles. The method has the advantages of simpleness in operation, relatively low synthesized temperature, controllable appearance shape and high photocatalytic activity of the indium vanadate nano particles; and the application field of an indium vanadate nano material can be further widened.

A cataluminescence sensitive material for rapid determination of formaldehyde and sulfur dioxide is a composite material comprising platinum-atom-doped Al2O3, CaO and In2O3. A preparation method is as follows: aluminum acetate, calcium chloride and indium nitrate solution are prepared into a solution, a small amount of agar is added to form a gel, the gel is dried and calcined to obtain composite powder comprising Al2O3, CaO and In2O3, the composite powder and chloroplatinic acid are added into an aqueous solution of glucose, and the composite material comprising Pt-atom-doped Al2O3, CaO and In2O3 can be obatiend by xenon lamp irradiation, filtration, water washing and drying. The sensitive material is used for making a gas sensor, and trace amounts of formaldehyde and sulfur dioxide in the air can be quickly and accurately determined in the field without common coexistent matter interference.

The invention discloses a platinum-based catalyst, a preparation method and an application thereof, and a preparation method for propylene. The preparation method of the platinum-based catalyst comprises the following steps of (1) mixing activated aluminium oxide with an auxiliary agent solution uniformly to obtain a mixed solution, vibrating for 1-6 hours under ultrasonic assistant at a temperature of 30-50 DEG C, drying and calcining to obtain a precursor, wherein the auxiliary agent solution is a stannous chloride solution and / or indium nitrate solution and a mass ratio of activated aluminium oxide to the auxiliary agent is (10:1)-(450:1); and (2) mixing the precursor with a chloroplatinic acid solution uniformly, vibrating for 1-6 hours under ultrasonic assistant at a temperature of 30-50 DEG C, drying and calcining, wherein a mass ratio of activated aluminium oxide to chloroplatinic acid is (40:1)-(500:1). The preparation method is simple in process and short in time; the prepared platinum-based catalyst can catalyze propane dehydrogenation to prepare propylene; active components are uniformly dispersed on carrier surfaces; and the prepared platinum-based catalyst has relatively high activity, propylene selectivity and stability.

The invention discloses a preparation method and application of a g-C3N4 / CaIn2S4 visible light compound photocatalyst. The method comprises the following steps: dissolving a certain amount of g-C3N4 powder in deionized water; adding calcium nitrate and indium nitrate, and stirring uniformly so as to obtain suspension liquid; finally adding excessive thioacetamide, and stirring until the thioacetamide is completely dissolved to obtain a solution; moving the solution into a high-pressure kettle for hydrothermal reaction to obtain a product; and after the reaction is finished, centrifuging the product, washing, drying and grinding so as to obtain the g-C3N4 / CaIn2S4 visible light compound photocatalyst. According to the method, a hydrothermal synthesis method is adopted for preparing the g-C3N4 / CaIn2S4 visible light compound photocatalyst; the preparation method is simple, the cost is low, and no pollution discharge exists in the preparation process; the prepared photocatalyst has good photocatalysis activity, and can be effectively applied to degradation of organic dye pollutants in waste water.

The invention discloses a luminous metal organic frame compound and a preparing method and application thereof. The chemical formula of the compound is [M(tcbpe)][(CH3)2NH2].H2O, wherein M represents the transition metal ion M3+(M=In, Eu, Gd), tcbpe represents 1,1,2,2-tetra[(4-carboxylphenyl)benzene]ethylene, indium nitrate, europium nitrate and gadolinium nitrate are mixed with 1,1,2,2-tetra[(4-carboxylphenyl)benzene]ethylene respectively according to amount-of-substance molar ratio of 4:3, then N,N-dimethyl formamide and acetonitrile are added and stirring is conducted, finally a small amount of dilute nitric acid is added dropwise, the mixture is placed in a high-temperature-resistant glass bottle for constant-temperature reaction for 48 h at 100 DEG C, and then the luminous metal organic frame compound is obtained. The compound can emit strong blue light, has high fluorescence quantum yield and has potential application value in the field of blue light emitting materials.

The invention discloses a luminescent sensitive material catalyzed by benzene and sulfur dioxide, which is characterized in that the material is a graphene-loaded composite material prepared from Bi2O3, PbO and In2O3. The preparation method comprises the following steps of oxidizing natural graphite by utilization of fuming sulfuric acid, a potassium permanganate concentrated sulfuric acid solution and hydrogen peroxide respectively so as to prepare graphene oxide; preparing bismuth oxalate, lead acetate and indium nitrate into a solution, adding agar powder to form gel, and drying, sintering and cooling the gel so as to obtain a complex metal oxide composed of Bi2O3, PbO and In2O3; adding the complex metal oxide and the graphene oxide into a hydrazine hydrate solution, illuminating the solution by utilization of an xenon lamp, and filtering and drying to obtain the graphene-loaded composite material prepared from Bi2O3, PbO and In2O3. The sensitive material provided by the invention has the advantage that the operation of quickly and accurately measuring trace benzene and sulfur dioxide in the air on site can be performed without the interference of common coexistent substances by a gas sensor made of the sensitive material.

The invention discloses the indium oxide film adulterating with tin and the preparation technique of minute figures. The indium nitrate and the tin tetrachloride are put into the acetylacetone solrent, add the deionized water to it and get the solution A; add the chelating agent of benzoyl acetone into the ethylene glycol monomethyl ether solvent and get the solution B; mix the solution A with the solution B, whisk it, aggradate it and get the indium oxide sol adulterated with light sensitive tin. The high pressure mercury lamp or ultraviolet laser pass through the masking with minute figures, irradiate the indium oxide sol adulterated with light sensitive tin, irradiate it with ultraviolet light in the air environment, get rid of its masking, put it in the absolute ethyl alcohol, dissolve the part that is not irradiated by the ultraviolet light, keep the part irradiated, heat it to get rid of the organic material and get the minute figure of the indium oxide film adulterated with tin. The invention does not need special vacuum, reaction chamber, photoresist and corrosive medium, can produce great areal minute figure and can get the high class minute figures of the ITO film.

The invention relates to a method for preparing an Al / In-codoped TiO2 photocatalyst, which comprises the following steps: dissolving 0.0675g of indium nitrate and 0.047g of aluminum chloride in 8mL of anhydrous ethanol, adding 2mL of tetra-n-butyl titanate and 0.1mL of concentrated hydrochloric acid, and stirring to obtain a precursor solution; dropwisely adding a mixed solution composed of 4mL of anhydrous ethanol and 0.3mL of water into the precursor solution, and stirring to form a gel; and aging the gel for 24 hours, drying in a drying oven, grinding into powder, adding the powder in an electric furnace, heating to 400-500 at the rate of 5 DEG C / minute, calcining for 3 hours, cooling to room temperature, grinding, and recording the photocatalyst sample as 0.5%Al-3%In-TiO2. The doping of the metallic ions inhibits the transition of TiO2 crystal form, increases the TiO2 surface lattice defects, widens the light absorption range of TiO2, and enhances the photocatalytic efficiency of TiO2.

The invention discloses a NaInO2 photocatalyst and a preparation method thereof. The method comprises the following steps: preparing the NaInO2 photocatalyst by a sol-gel method; with crystal sodium acetate and indium nitrate as raw materials, and ethylene glycol as a solvent, electrically stirring under a water bath condition to form a sol-gel system; baking the sol-gel system to obtain a precursor; burning the precursor at certain temperature so as to obtain the NaInO2 photocatalyst. The NaInO2 photocatalyst provided by the invention has photocatalytic performance under ultraviolet light, and also has certain photocatalytic performance within a visible light range. The preparation method disclosed by the invention lays a foundation for development of a novel visible light response photocatalyst, has important reference value on large-scale industrial application of a photocatalytic material, and has broad application prospects in the field of environmental photocatalysis of wastewater treatment, air purification and the like.

The invention provides a preparation method of In2O3 nanoparticles / MoO3 nanorod composite materials. The preparation method concretely comprises the following steps that ammonium molybdate tetrahydrate, hydrogen peroxide and concentrated nitric acid are used as raw materials; after calcining treatment and hydrothermal reaction, rodlike molybdena gas sensitive materials are obtained; further, indium nitrate is used as raw materials; granular indium oxide is loaded on the surface of rodlike molybdena; finally, In2O3 nanoparticles / MoO3 nanorod composite gas sensitive materials are obtained. The method has the advantages that the production process is simple; the obtained gas sensitive materials have a heterogeneous structure formed by indium oxide and molybdenum oxide; higher sensitivity and fast response and recovery on trimethylamine are shown; the method can be used in the field of a trimethylamine gas sensor, so that the novel gas sensitive material with high sensitivity is obtained.

The invention relates to alloying metal sulfide, in particular to a method of preparing a quaternary sulfide quantum dot photocatalyst. The method of preparing the I-III-VI CuInZnS quantum dot photocatalyst by taking copper acetate, zinc acetate, indium nitrate and thiacetamide as raw materials is simple in preparation technology; and the photocatalyst has good visible photocatalytic activity. A valence band of a quantum dot system consists of a 2p orbit of sulfur and a 3d orbit of copper, a band gap of a substance, namely light absorption capacity is influenced by regulating and controlling the copper quantity, and a copper defect effect is weakened by a catalyst promoter Pt, so that separation and transfer of a photoexcitation electron hole of nanocrystalline are greatly improved, and the activity of produced hydrogen is optimized.

A high-activity photo-catalyst CaIn2O4 is prepared through mixing calcium nitrate, indium nitrate, amino-acetic acid as organic fuel and water to obtain solution, stirring, heating at 200-250 dig. C for 20-30 min, slow heating to 300 deg.C, burning while synthesizing to obtain rod-shaped CaIn2O4 nano-particles, calcination at 1100-1200 deg. C for 8-12 hr and natural cooling to obtain slender rod shaped powder. It has high photo-catalytic degradation performance.

The invention relates to I-III-VI group semiconductor quantum dots, in particular to a synthesis method for an Ag-In-Zn-S / CQDs heterojunction material. The synthesis method comprises the following steps: weighing and dissolving silver nitrate, indium nitrate and zinc acetate dihydrate in deionized water, stirring and dissolving to obtain a clear solution; dissolving a mixed ligand thiohydracrylicacid (MPA) and L-cysteine (Cys) in an aqueous solution; then adding into the clear solution to obtain a mixed solution; adjusting the pH value of the mixed solution with a NaOH solution; then adding thioacetamide and stirring ultrasonically; then adding carbon quantum dots in different amounts; then carrying out a hydrothermal reaction; and after the reaction, carrying out centrifugal drying to obtain the Ag-In-Zn-S / CQDs heterojunction material with different photocatalytic performance by selecting the capacity of the carbon quantum dots and the temperature of the hydrothermal reaction.

The invention discloses a three-dimensional indium coordination polymer containing mixed ligands and a synthesis method and application thereof, relating to three-dimensional indium coordination polymers and synthesis methods and application thereof. The three-dimensional indium coordination polymer containing the mixed ligands is used for solving the technical problem of the existing blue fluorescent organic light-emitting materials that the synthesis cost is high and the thermal stability is poor. The three-dimensional indium coordination polymer containing the mixed ligands has a molecular formula of C66H42In8N6O45 and a structural formula shown in a drawing. The synthesis method disclosed by the invention comprises the steps of putting 2,6-pyridinedicarboxylic acid, terephthalic acid and indium nitrate into distilled water, stirring at room temperature until 2,6-pyridinedicarboxylic acid, terephthalic acid and indium nitrate are mixed uniformly, adjusting the pH value of a system, then, putting the system into a stainless-steel reactor lined with polytetrafluoroethylene, reacting, and then, cooling to room temperature, thereby obtaining a yellow hexagonal crystal, namely the three-dimensional indium coordination polymer containing the mixed ligands. The three-dimensional indium coordination polymer containing the mixed ligands, disclosed by the invention, can serve as a metal organic blue light-emitting material and is applied to the field of preparation of organic light-emitting materials.

The invention relates to a method for preparing indium hydroxide. The method comprises the following steps: S1, melting an indium ingot at a temperature of 200-400 DEG C, pouring the melting liquid into a container filled with purified water, spraying the purified water onto the poured melting liquid to obtain indium flower, and filtering the indium flower by a screen; S2, dissolving the filteredindium flower with nitric acid to obtain an indium nitrate mixed solution, diluting the indium nitrate mixed solution with water until the molar concentration of indium is 0.1-5.0mol / L; S3, adding a water-soluble acid amide dispersing agent into the mixed solution, and adding an alkaline aqueous solution to produce a precipitate so as to obtain hydroxide precursor slurry; S4, transferring the slurry into a storage tank to be washed by ceramic membrane equipment; S5, performing spray drying on the washed slurry, thereby obtaining the dried indium hydroxide powder. With the adoption of a combination of chemical precipitation and spray drying, the method disclosed by the invention has the characteristics of being simple in process, short in period, capable of easily realizing industrial production and the like, and the product is uniform in granularity, excellent in dispersity, less in agglomeration and high in purity.

The invention relates to a method for preparing a textured ZnO membrane with a pyramid-like structure. The method comprises the following steps: taking zinc acetate as a Zn source, indium nitrate or indium acetate as a doped indium source, aluminum nitrate or aluminum acetate as a doped aluminum source, gallium nitrate or gallium acetate as a doped gallium source and anhydrous ethanol and / or water as a solvent; preparing a zinc source solution and a doped source solution with certain concentration respectively, and mixing the zinc source solution and the doped source solution; adding glacial acetic acid into the mixture; using high-purity N2 or air as carrier gas; and conveying the reaction liquid into a membrane precipitation chamber for growth, wherein a substrate can be glass or stainless steel and the like, and the growth temperature is between 300 and 550 DEG C. The method adopts cheap and nontoxic chemical products and utilizes a low-cost ultrasonic atomizer to directly obtain the ZnO membrane with a textured structure and light scattering characteristic under the condition of not requiring the doping of B2H6, so that the method cannot pollute the environment, belongs to 'environment-friendly' technology, and can be suitable for the preparation of the large-area (for example, S is equal to 1.2X0.6 meter) ZnO transparent conductive film.

The invention relates to hexagonal-tube-shaped indium oxide and a preparation method thereof, and belongs to the technical field of inorganic oxide semiconductor material preparation.Indium oxide is prepared with an indium (III)-terephthalic acid complex serving as the precursor, and the appearance and size of indium oxide are controlled.The method specifically includes the following steps of firstly, mixing indium nitrate and terephthalic acid in an N,N'-dimethylformamide (DMF) solution to be heated and stirred to obtain the indium (III)-terephthalic acid complex, and further conducting centrifugal separating, washing and drying to obtain the indium (III)-terephthalic acid complex to be subjected to pyrolysis to prepare an indium oxide material.The indium oxide and the preparation method have the advantages that the preparation process is simple and easy to implement, the appearance and structure of obtained indium oxide can be effectively controlled, the obtained product has good degrading capacity for 4-chlorophenol, and good application prospects are achieved in the field of sewage treatment and the like.

The invention relates to the technical field of semiconductor photocatalysis, in particular to a preparation method and application of an InVO4-CdS heterojunction photocatalyst. According to the method, a visible-light response indium vanadate and cadmium sulfide composite photocatalyst material is obtained by taking cadmium acetate, thiourea, indium nitrate and ammonium metavanadate as raw materials through a microwave synthesis method and a hydrothermal method.

The invention provides a metal-organic framework of In and a preparation method thereof, and application of the metal-organic framework of In to dye adsorption, belonging to the technical field of crystalline materials. The chemical formula of the metal-organic framework of In is [In(PBPTTBA)][(CH3)2NH2], wherein PBPTTBA is organic ligand 4,4',4'',4'''-(4,4'-(1,4-phenylene)bis(tripyridin-6,4,2-yl))tribenzoic acid. Under an enclosed condition, the organic ligand PBPTTBA and indium nitrate undergo a thermal reaction in N,N-dimethyl formamide so as to obtain the crytal of the metal-organic framework; and the metal-organic framework exerts preferential adsorption effect on organic dye molecules, can be used for removal of organic dye molecules and shows good separation effect.

The invention discloses an indium-doped ordered mesoporous alumina (In-OMA) supported noble metal catalyst and application thereof. Indium-doped ordered mesoporous alumina with oxygen vacancy is synthesized by a sol-gel method taking P123 as a template agent, alcohol as a solvent, nitric acid as an acidity regulator, indium nitrate salt as an indium source and aluminum isopropoxide as an aluminum source; as a carrier, the indium-doped ordered mesoporous alumina is supported with a noble metal to obtain the catalyst. The indium-doped ordered mesoporous alumina carrier obtained by the invention has the characteristics of relatively large specific surface area, uniform-height pore distribution, narrow pore diameter distribution and the like; moreover, the metal indium is dispersed more uniformly, thus the chemical properties of the carrier surface are optimized better and more uniformly, the dispersity of the noble metal, the sintering resistance of the catalyst and the like can be effectively improved, and the catalytic activity of the catalyst in the fields such as nitrogen oxide (NOx) reduction can be remarkably enhanced to gain a broad application prospect.

The invention relates to an appearance-controllable indium oxide powder and a low-temperature hydrothermal synthesis method thereof and belongs to the technical field of inorganic chemical synthesis. The low-temperature hydrothermal synthesis method comprises the following steps: taking indium nitrate or indium chloride as an indium source, urea as an alkaline source, nitric acid or hydrochloric acid as a hydrolysis inhibitor and polyacrylic acid (PAA) and sodium dodecyl sulfonate (SDS) as a double template agent, and reacting for 8-12 hours under a hydrothermal condition at 80-95 DEG C; performing suction filtration and washing a product, and roasting to obtain In2O3 power. Cubic, flower-shaped, spherical and hollow spherical products formed by primary particles as In2O3 single crystals can be obtained by regulation and control of PAA and SDS consumption; the obtained In2O3 power belongs to a cubic crystal system. The obtained products are made into a side heat type gas sensor element for gas sensitive performance detection; when the working temperature of a device made of the cubic In2O3 power is 100 DEG C, the gas-sensitive property of 100-ppm nitromethane is good, a sensitivity value is higher than 500, the response time is about 1-2 s, and the quick detection on flammable and explosive nitromethane gas at a relatively low temperature can be realized.