67 results about "Indium chloride" patented technology

The invention discloses a preparation method of an In2O3-Cu-Cu2O ternary heterojunction catalyst and a preparation method of the In2O3-Cu-Cu2O ternary heterojunction catalyst. The method comprises the following steps: at room temperature and normal pressure, firstly, dissolving indium chloride tetrahydrate in a mixed solvent of ethylenediamine-ethylene glycol (the volume ratio is 1: 20-1: 30) and dihydric alcohol amine to obtain a homogeneous solution; then transferring the solution to a hydrothermal kettle, adding deionized water and Cu2O powder with different volumes, and carrying out hydrothermal crystallization at 160-200 DEG C for 10-14 hours; and centrifuging the obtained precipitate, alternately washing with water and alcohol for 2-3 times, carrying out vacuum drying at 60 DEG C for 5-7 hours, heating to 600 + / -10 DEG C at a speed of 3-5 DEG C / min in an N2 atmosphere, calcining for 3 hours, and cooling along with a furnace to obtain a target product. By adjusting the adding amount of the deionized water, the mass proportion of the three phases of In2O3, Cu and Cu2O can be continuously adjusted and controlled, and controllable preparation from'rich copper 'to'rich cuprous oxide' and'stable ternary 'is achieved.

The invention discloses a preparation method for directly preparing 2, 5-furandicarboxaldehyde from a carbohydrate, and the preparation method comprises the following steps: reacting a mixture I containing the carbohydrate, a catalyst, an organic phase solvent and a water phase solution in an oxygen-containing atmosphere to obtain the 2, 5-furandicarboxaldehyde, the catalyst comprises a component I and a component II; the component I is selected from at least one of aluminum chloride, indium chloride and chromium chloride; and the component II is an organic hydrophobic modified manganese oxide. According to the method, a 5-hydroxymethylfurfural intermediate product generated by reaction is directly oxidized without separation to prepare 2, 5-furandicarboxaldehyde, so that side reactions such as polymerization and the like are reduced; the carbohydrates are dissolved in the water phase and cannot be catalyzed and oxidized by the hydrophobic oxidation catalyst dispersed in the organic phase to generate byproducts, and the method has the advantages of low cost, mild reaction conditions, high product yield and the like.

The invention discloses an indium-doped cobaltosic oxide catalyst as well as a preparation method and application thereof, and the indium-doped cobaltosic oxide catalyst is prepared according to the following method: 1) dissolving cobalt nitrate, urea and ammonium chloride in deionized water, and stirring to obtain a clear precipitate-free reaction solution; (2) transferring the reaction liquid into a reaction container filled with foamed nickel, and carrying out hydrothermal reaction to obtain the foamed nickel loaded with a sample; 3) washing the foamed nickel loaded with the sample after the reaction with ethanol and water, and drying; 4, the dried foam nickel loaded with the sample is soaked in an indium chloride solution, stirring reaction is conducted, vacuum drying is conducted, and indium-doped cobaltosic oxide is obtained.By means of indium doping, the morphology and components of the indium-doped cobaltosic oxide are regulated and controlled, and the activity and selectivity of the catalyst for electrochemical reduction of nitrite to produce ammonia are improved.

The application discloses a graphene quantum dot / indium sulfide electromagnetic wave absorbing material and a preparation method thereof, and comprises the following steps: carrying out a hydrothermal reduction reaction on trinitro-pyrene and an alkaline solution to obtain graphene quantum dot powder rich in hydroxyl functional groups on the surface; and carrying out a hydrothermal reaction on a mixture of indium chloride tetrahydrate and thioacetamide and the graphene quantum dot powder to obtain a graphene quantum dot / indium sulfide heterojunction electromagnetic wave absorbing material with a sulfur vacancy concentration of 3.8% to 5.7%. The addition amount of the sulfur source is controlled by regulating the addition amount of the thioacetamide in the hydrothermal reaction process, the introduced sulfur vacancy concentration is accurately controlled, the In-O covalent bond is formed at the interface between the graphene quantum dot and the indium sulfide, the interface covalent bridging structure is formed, the interface charge transfer efficiency is accelerated, the built-in electric field in the interface is enhanced, stronger interface polarization loss is induced, and the performance of high absorption intensity and wide bandwidth of the composite wave absorbing material is realized.

The application discloses a preparation method of an In2O3-Cu-Cu2O ternary heterojunction catalyst. The method comprises the following steps: dissolving indium chloride tetrahydrate in ethylenediamine-glycol (volume ratio 1:20-1:30) binary glycol amine mixed solvent to obtain a homogeneous solution at room temperature and normal pressure; then, the solution is transferred to a hydrothermal kettle, different volumes of deionized water and Cu2O powder are added, and hydrothermal crystallization is carried out at 160-200 DEG C for 10-14 h; the obtained precipitate is subjected to centrifugal separation, water washing-alcohol washing alternately 2-3 times, vacuum drying at 60 DEG C for 5-7 h, and then calcination is carried out under N2 atmosphere at a temperature increasing rate of 3-5 DEG C / min to 600±10 DEG C for 3 h, and the target product is obtained after furnace cooling. By adjusting the addition amount of deionized water, the mass ratio of In2O3, Cu and Cu2O three phases can be continuously controlled, and the controllable preparation from "rich copper" to "rich cuprous oxide" to "stable ternary" can be realized.

The invention discloses a preparation method of a CuInS2 / FeS2 wood mildew-proof antibacterial agent, which comprises the following steps: dissolving cuprous chloride, indium chloride tetrahydrate, ferric trichloride hexahydrate and thiourea or thioacetamide in ethylene glycol, and carrying out one-step solvothermal reaction and calcination to obtain a CuInS / FeS composite antibacterial agent; the material has triple effects of photo-thermal, photocatalysis and copper ion slow release, and can inhibit mildew and decay fungi on the surface of wood under the condition of visible-near infrared illumination or no illumination. NH4VO3 and 2-methylimidazole are added into a reaction system and calcined in an ammonia-containing atmosphere, so that a V < 5 + > / V < 4 + > redox pair can be formed on the surface, near-infrared absorption is further widened, electron-hole recombination is delayed, and long-acting antibiosis under weak light is realized. The process is simple, does not contain chromium and arsenic heavy metals, and is suitable for environmental protection of wood materials.

The application discloses a preparation method of triethyl indium, and relates to the technical field of metal organic source synthesis, wherein a commonly used indium source is mainly trimethyl indium; the trimethyl indium is in a solid state at normal temperature, and is easy to cause the solid indium source to be easy to be hardened and to have excessive residues; when the solid indium source is used in a machine, the concentration output stability is worse than that of a liquid source; the liquid indium source will become an important indium source in the future; the operation method of the triethyl indium in preparation is more complicated; and the purity of the triethyl indium prepared by purification cannot reach a better ideal state. In the application, n-butyllithium and ethyl iodide are reacted under the protection of inert gas, then the reaction product is reacted with indium chloride to generate triethyl indium; the whole operation is simple, raw materials are easy to obtain, and the product has high purity; under the protection of inert gas, the interference of other solution reagents in the preparation process is reduced; therefore, high-quality triethyl indium raw materials can be purified and processed.

The invention belongs to the technical field of heterogeneous catalysis, and relates to a preparation method and application of a molecular sieve-sulfur indium zinc heterogeneous material for photo-thermal driven CO2 cycloaddition, and the preparation method comprises the following steps: adding a certain amount of TS-1 molecular sieve into absolute ethyl alcohol, and stirring for 0.5-1.5 h; the preparation method comprises the following steps: respectively weighing anhydrous zinc chloride, indium trichloride tetrahydrate and thioacetamide according to a molar ratio of 1: 2: (6-10), mixing, adding into ethanol dispersed with a TS-1 molecular sieve, and stirring for 20-40 minutes; and heating the molecular sieve-sulfur indium zinc heterogeneous material TS-ZIS at 140-180 DEG C for 10-14 hours, cooling to room temperature, centrifugally washing and drying to obtain the molecular sieve-sulfur indium zinc heterogeneous material TS-ZIS. The prepared heterogeneous material can catalyze CO2 cycloaddition reaction in a photo-thermal concerted mode under the mild condition, the catalytic performance is good, the performance is not obviously reduced after multiple times of circulation, and the stability is good.

The application discloses a high-fluorescence-quantum-yield Sb 3+ :Cs2NaInCl6 perovskite preparation method belongs to the technical field of inorganic luminescent material preparation. First, cesium chloride, sodium chloride, indium chloride and antimony chloride are mixed and ground, the obtained powder is placed in a vacuum drying box and is treated at 60-300 DEG C for 0.5-2h, a mixture of oleylamine and oleic acid is added, and grinding is continuously performed until the solution becomes uniform, a hydrochloric acid solution with pH=3.2 is added to the product, and after uniform grinding, DOPC is immediately added to the product, and it is observed that the blue fluorescence of the product is strengthened, thereby obtaining high-purity and high-fluorescence-efficiency Sb 3+ :Cs3TbCl6NCs inorganic perovskite. The application realizes Sb doping through mechanical grinding for the first time 3+ :Preparation of Cs2NaInCl6 NCs, and the fluorescence efficiency of the Cs2NaInCl6 NCs is obviously enhanced through post-processing, thereby being Sb 3+ :Application of Cs2NaInCl6 in photoelectricity provides a good prospect.

The embodiment of the present application relates to the technical field of functional materials, and specifically discloses a CuInS2-In2S3 nano-heterojunction catalyst and a preparation method and application thereof, the CuInS2-In2S3 nano-heterojunction catalyst is prepared by using indium chloride, octadecene, oleylamine, sulfur powder and appropriate Cu 1.94 S nanocrystals as raw materials, nucleating In2S3 particles on the Cu 1.94 S nanocrystals through heating reaction, the catalyst has stable structure and stable product performance, exhibits good carbon dioxide reduction catalytic activity, and greatly improves the CO2 reduction product selectivity of CuInS2, thereby solving the problems that the product selectivity of CuInS2 is low in the CO2 reduction, and the small current density limits the catalytic activity and application in the catalytic process in the prior art. Moreover, the preparation method provided by the embodiment of the present application has high controllability, and is simple and efficient compared with the method in the prior art, and has a wide market prospect.

The invention provides a wide-spectrum ZnIn2S4 / WO3 quantum dot composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalysts. The preparation method of the composite photocatalyst comprises the following steps: dissolving tungsten chloride, oxalic acid and sodium borohydride in a solvent, and carrying out a heating reaction to obtain WO3 quantum dots after the reaction is finished; the preparation method comprises the following steps: adding zinc chloride, indium chloride tetrahydrate and thioacetamide into a solvent, and mixing to obtain a mixed solution; wO3 quantum dots are dissolved in the mixed solution, then oil bath heating is carried out, and the ZnIn2S4 / WO3 quantum dot composite photocatalyst is obtained. According to the composite photocatalyst disclosed by the invention, WO3 quantum dots and low-temperature oil bath compounding are introduced, so that the light response range is widened, the full-spectrum solar energy utilization rate is realized, and the hydrogen production performance is also improved.

The invention provides a solid electrolyte, a preparation method thereof and a lithium battery. The preparation method of the solid electrolyte comprises the following steps: providing raw materials including lithium chloride, indium chloride, yttrium chloride and lithium fluoride according to a stoichiometric ratio of Li3In1-mYmCl6-nFn, m being 0.05-0.4 and n being 0.15-0.45; grinding the lithium chloride, the indium chloride, the yttrium chloride and the lithium fluoride to prepare a precursor; and carrying out primary sintering at the temperature of 120-200 DEG C, and carrying out secondary sintering at the temperature of 240-280 DEG C. The positive ion-negative ion double-site cooperation strategy aims at breaking through the performance bottleneck of traditional doping, and the solid electrolyte has high ionic conductivity, wide voltage stability, low interface impedance and long cycle life at the same time.

The application belongs to the technical field of nanometer material preparation, and discloses a tubular ZnIn2S4 photocatalyst and a preparation method thereof. Zinc chloride, indium chloride and a hydrazine hydrate solution are mixed, and then thiourea is added to obtain a reaction precursor solution, and a hydrothermal reaction is performed to obtain the tubular ZnIn2S4 photocatalyst. The preparation method has a simple process flow, is convenient to operate, and has relatively mild reaction conditions. The method does not need complex and expensive instrument equipment, and does not need to introduce an additional template agent or a surfactant, reduces the difficulty of subsequent impurity removal, and is beneficial to maintaining the purity and structural stability of the product composition.

The present invention discloses a photocatalyst and its preparation method and application, belonging to the field of semiconductor photocatalytic water decomposition hydrogen production technology. A photocatalyst preparation method comprises the following steps: S1: preparing CeVO4 nanoparticles, S2: preparing AZnIn2S4 / BCeVO4 heterojunction nanomaterials, using a solvent thermal synthesis method, weighing zinc chloride, indium trichloride tetrahydrate, and thioacetamide and dissolving them in a solvent, continuously ultrasonicating for 25-40 minutes to obtain a mixed solution, dispersing the CeVO4 nanoparticles prepared in step S1 in the mixed solution, ultrasonicating for 25-35 minutes at room temperature, then transferring to an autoclave for heating, centrifuging to obtain a precipitate, washing the precipitate, removing impurities on the precipitate surface, and drying to obtain the AZnIn2S4 / BCeVO4 heterojunction nanomaterial as a photocatalyst. The present invention synthesizes the AZnIn2S4 / BCeVO4 heterojunction by a solvent thermal method to obtain a photocatalyst with high photocatalytic performance.

The invention discloses a preparation method for directly preparing 2, 5-furandicarboxylate from a carbohydrate compound, and the preparation method comprises the following steps: reacting a mixture I containing the carbohydrate compound, a catalyst, an alcohol compound, an organic solvent and a water phase in an oxygen-containing atmosphere to obtain 2, 5-furandicarboxylate, the catalyst comprises a component I and a component II; the component I is selected from at least one of aluminum chloride, indium chloride and chromium chloride; and the component II is an organic hydrophobic modified cobalt-manganese composite catalyst. According to the method, a 5-hydroxymethylfurfural intermediate product generated by reaction is directly oxidized and esterified without separation to prepare 2, 5-furandicarboxylate, so that side reactions such as polymerization and the like are reduced; the carbohydrates are dissolved in the water phase and cannot be catalyzed and oxidized by the hydrophobic oxidation catalyst dispersed in the organic phase to generate byproducts, and the method has the advantages of low cost, mild reaction conditions, high product yield and the like.

This invention discloses a sunflower-shaped tungsten oxide / indium zinc sulfide heterojunction. The tungsten oxide / indium zinc sulfide heterojunction consists of tungsten trioxide located within a central sphere and indium zinc sulfide distributed as nanosheets on the sphere's surface, forming a three-dimensional sunflower shape. Using glucose as a raw material, this invention first prepares uniformly sized carbon spheres via a hydrothermal method. Then, using the synthesized carbon spheres as a template and WCl6 as a precursor, hollow WO3 spheres are obtained through in-situ hydrolysis combined with high-temperature calcination. Finally, using the synthesized hollow WO3 spheres, indium chloride, indium chloride, and thioacetamide as starting materials, the three-dimensional sunflower-shaped tungsten oxide / indium zinc sulfide heterojunction is prepared using a water bath method. The WO3 / ZnIn2S4 heterojunction material of this invention has a larger specific surface area than pure WO3, which is beneficial for exposing more active sites. The three-dimensional heterojunction constructed in this invention can effectively inhibit the free diffusion of CO2 molecules, increase the local CO2 concentration on the catalyst surface, and is more conducive to the adsorption and activation of CO2 molecules.

The invention relates to a preparation method of a novel perovskite C8H32Cl7 (In1-xSbx) N4 yellow luminescent material, which comprises the following steps: sequentially dissolving indium chloride, dimethyl ammonium chloride, antimony chloride, oleylamine, oleic acid and concentrated hydrochloric acid in dimethyl sulfoxide, and fully stirring and mixing; reacting the mixed solution at a constant temperature, and leaving a generated product after the reaction is finished; and repeatedly cleaning the product with toluene, and drying to obtain the yellow luminescent material. The size of the synthesized novel perovskite yellow luminescent material can reach 2 cm, the requirement of growth on growth conditions is low, and theoretically, the material can be successfully grown according to the synthesis conditions provided by the invention.

The invention mainly relates to the field of catalytic hydrogen evolution of composite photocatalytic materials, and provides synthesis of a transition metal sulfide / oxide modified bimetallic sulfide composite material and application in photocatalytic hydrogen evolution. The preparation method comprises the following steps: preparing a transition metal sulfide / oxide MoS2 / MoO3-x compound in one step by using a method of calcining a mixture of ammonium molybdate and thiourea in a nitrogen atmosphere, then adding the compound into an ethanol solution containing indium chloride tetrahydrate, zinc chloride and thioacetamide, and synthesizing ZnIn2S4 by adopting a solvothermal method. Finally, the bimetallic sulfide composite material MoS2 / MoO3-x (at) ZnIn2S4 modified by the transition metal sulfide / oxide is prepared, and the photocatalytic performance of the bimetallic sulfide composite material MoS2 / MoO3-x (at) ZnIn2S4 is remarkably improved. By introducing a proper amount of MoS2 / MoO3-x, the visible light absorption capacity of the material can be improved, and visible light can be fully utilized. The material has great development potential and research value in the field of photocatalytic hydrogen evolution.

The invention relates to a preparation method of a Bi-doped ZnIn2S4 / BiOBr heterojunction photocatalyst and an application of the Bi-doped ZnIn2S4 / BiOBr heterojunction photocatalyst. The method adopts a perovskite one-step conversion method and comprises the following steps: firstly, adding indium chloride, zinc chloride and TAA into absolute ethyl alcohol to react to obtain ZnIn2S4; then adding the obtained ZnIn2S4, CsBr and BiBr3 into DMSO (Dimethylsulfoxide) to prepare a precursor solution, and then injecting the precursor solution into isopropanol to prepare Cs3Bi2Br9 / ZnIn2S4; and finally, dispersing the mixture into deionized water to obtain the Bi-doped ZnIn2S4 / BiOBr photocatalyst. The method has a remarkable effect in the aspect of organic dye sewage treatment, and the sewage treatment efficiency is greatly improved.

The invention relates to the technical field of preparation of anhydrous indium chloride, in particular to a preparation method of anhydrous indium chloride, which comprises the following steps: (a) providing an indium source and a chlorine source, the indium source being indium metal or indium compound, and the chlorine source being chlorine, hydrogen chloride or organic chloride; and (b) in an anhydrous inert atmosphere, introducing the indium source and the chlorine source into a reactor, controlling the reaction temperature in a range of 100-400, and carrying out a chlorination reaction for 1-10 hours to generate the indium chloride intermediate. According to the preparation method of anhydrous indium chloride, a product with ultra-high purity and stable chlorine content can be stably obtained by effectively inhibiting a hydrolysis reaction, meanwhile, the hygroscopicity of the product is remarkably reduced, and the product is convenient to store and transport. The technological process is mild and controllable, the safety is high, toxic corrosive gas is prevented from being used, and the method has the remarkable advantages of being easy and convenient to operate and environmentally friendly.

This invention relates to the field of pollutant detection technology, and discloses a method for preparing bimetallic selenides and its non-enzymatic electrochemical sensor and applications. The reference electrode of the non-enzymatic electrochemical sensor is a silver / silver chloride electrode, the auxiliary electrode is a platinum wire electrode, and the working electrode is a glassy carbon composite electrode containing a bimetallic selenide coating. The bimetallic selenide is CuInSe2, which exhibits sensitivity in identifying parathion. This improves the accuracy and ease of operation in detecting parathion and reduces the detection cost. The method for preparing the bimetallic selenide proposed in this invention uses ethylamine and N,N-dimethylformamide as solvents, and through a solvothermal reaction, reacts cuprous chloride, indium chloride, and selenium powder to generate CuInSe2, which has the advantages of high reaction efficiency and low manufacturing cost.

The invention discloses a ternary chalcogenide composite perovskite catalytic material as well as a synthesis method and application thereof, and belongs to the field of photocatalysts. The synthesis method comprises the following steps: adding silver nitrate and indium chloride into absolute ethyl alcohol, then adding thioacetamide, and carrying out hydrothermal reaction, centrifugation, washing and drying to obtain a material AgIn5S8; the preparation method comprises the following steps: dissolving AgIn5S8, MnCl2. 4H2O and citric acid in distilled water, adding La (NO3) 3.6 H2O, heating and continuously stirring until a gel precursor is obtained, carrying out hydrothermal reaction, washing, filtering and drying, calcining the obtained composite material, and naturally cooling to obtain the catalytic material AgIn5S8 / LaMnO3. The AgIn5S8 / LaMnO3 photocatalytic system realizes effective pollutant degradation, and after being excited by visible light, the AgIn5S8 / LaMnO3 photocatalytic system reacts with water molecules and dissolved oxygen to generate various active oxidizing substances so as to efficiently degrade pollutants in a water phase.

The invention relates to the technical field of solar energy resource utilization, and discloses surface-modified indium oxide and a preparation method and application thereof.The surface modification method of indium oxide comprises the steps that indium chloride and an ammonium hydroxide ethanol solution are mixed, and turbid liquid is obtained; centrifuging the turbid liquid, taking the centrifuged solid, and drying; grinding and calcining the dried solid to obtain powder; and placing the powder in PECVD equipment, introducing gas, keeping a low-pressure atmosphere in a tubular furnace in the PECVD equipment, setting the power of a radio frequency circuit of the PECVD equipment, and carrying out heat preservation to obtain the surface modified indium oxide. By means of the method, multiple effective utilization of solar energy resources and in-situ utilization of extraterrestrial resources are achieved. The prepared surface modified indium oxide can be applied to photo-thermal catalytic carbon dioxide reduction reaction.

The present invention discloses a high-efficiency H3PMo 12 O 40 The invention relates to the technical field of photocatalytic materials, and the preparation method comprises the following steps: (1) adding magnesium chloride, indium chloride and thioacetamide to deionized water in sequence, mixing and stirring to obtain a suspension; (2) adding H3PMo to the suspension; 12 O 40 Then a hydrothermal reaction is carried out to obtain a precipitate, which is H3PMo 12 O 40 / MgIn2S4 composite photocatalyst. The present invention adopts Keggin type heteropoly acid H3PMo 12 O 40 The catalyst obtained by modifying the flower-shaped MgIn2S4 has the characteristics of stable structure, good dispersibility and adsorption, which is conducive to the transmission of electrons.

The present invention belongs to the field of photocatalysis and discloses a method for preparing a Zn3In2S6 photocatalyst with a defective hollow structure and its application in the co-production of hydrogen peroxide and benzaldehyde. The present invention synthesizes the Zn3In2S6 photocatalyst with a defective hollow structure by a solvent thermal method. Zinc sulfate heptahydrate, indium chloride tetrahydrate, thioacetamide, and ethylene glycol are uniformly mixed and then transferred to a polytetrafluoroethylene-lined autoclave for solvent thermal treatment to obtain the Zn3In2S6 photocatalyst with a defective hollow structure. The Zn3In2S6 photocatalyst with a defective hollow structure increases the specific surface area of ​​the material, while also increasing the number of active sites and improving reaction performance. The synthesized Zn3In2S6 photocatalyst with a defective hollow structure has the advantages of simple synthesis operation and being green and pollution-free. In addition, the catalyst has excellent photocatalytic co-production performance and stability for hydrogen peroxide and benzaldehyde.

The invention discloses a preparation method of an Er-doped CdIn2S4 photocatalyst for photocatalytic degradation of methylene blue, which comprises the following steps: adding cadmium chloride, indium chloride tetrahydrate and thioacetamide into deionized water, and carrying out hydrothermal reaction to prepare the CdIn2S4 photocatalyst; in the same reaction system, Er (NO3) 3.5 H2O is added according to different proportions of the molar weight of indium trichloride tetrahydrate, and three samples with different Er doping concentrations are obtained. The photocatalytic performance of CdIn2S4 is effectively regulated and controlled through Er doping, the separation efficiency of photon-generated carriers is remarkably improved, and meanwhile the light absorption capacity of the material is enhanced. More adsorption sites and active sites are exposed on the surface of the modified catalyst, so that the degradation efficiency of methylene blue is greatly improved. The method has the remarkable advantages of being simple in preparation process, low in cost, easy to recycle and the like, and shows a good application prospect in the field of dye wastewater treatment.

The invention provides a method for purifying indium, and belongs to the technical field of metallurgy. The method for purifying indium comprises the following steps: firstly, carrying out alkaline smelting on crude indium, sodium hydroxide and an additive, then carrying out chlorination refining on a first indium ingot and indium chloride, and then carrying out oxygen-enriched blowing on a second indium ingot, so that four metal impurities of Sn, Sb, Pb and Bi in the crude indium can be deeply removed, the purity of the obtained refined indium is greater than or equal to 3N5, and the contents of the four metal impurities of Pb, Sb, Sn and Bi in the refined indium are all less than 0.1%.

The invention relates to the technical field of semiconductor nanomaterials, and particularly discloses a semiconductor Moire superlattice material and a preparation method thereof.The Moire superlattice structure of ZnIn2S4 is successfully prepared for the first time through a solvothermal method, and the formation mechanism of the Moire superlattice structure is clarified; with zinc acetate and indium chloride as precursors and thioacetamide as a solvent, synthesizing a ZnIn2S4 Moire superlattice structure in one step by controlling reaction conditions; the rotation angle of the prepared Moire superlattice is about 12 degrees and integral multiples of 12 degrees, and the controllability and reproducibility of the preparation method are good; the photoelectric property of ZnIn2S4 is expected to be further improved, and the application potential of ZnIn2S4 in the fields of photocatalysis, photoelectric detection, water photovoltaic power generation, photovoltaic power generation and the like is developed.

The invention discloses a metal sulfide-based S-type heterojunction photocatalyst and a preparation method thereof, and the method comprises the following steps: respectively dissolving sodium tungstate and zinc acetate with the same substance amount in deionized water, and stirring to form a first turbid liquid; carrying out first-step hydrothermal reaction, and treating to obtain zinc tungstate nanorod powder; the method comprises the following steps: weighing indium chloride, zinc acetate and thioacetamide according to the element stoichiometric ratio of sulfur indium zinc, dissolving the indium chloride, the zinc acetate and the thioacetamide in deionized water, and stirring to form a solution; and adding zinc tungstate nanorod powder into the solution, stirring to form a second turbid liquid, carrying out a second-step hydrothermal reaction, and treating to obtain the S-type heterojunction photocatalyst. The heterojunction catalyst with an S-type energy band staggered structure is formed, compounding of carriers in a single-component catalyst is inhibited, photo-generated carriers with high oxidation-reduction capacity are kept to participate in a catalytic reaction, the forbidden band width is effectively reduced, light absorption of a system is enhanced, and therefore the heterojunction catalyst is higher in catalytic activity and higher in catalytic efficiency. The photocatalytic hydrogen production efficiency is improved.

This invention discloses a method for preparing and applying a Bi-doped ZnIn2S4 / BiOBr heterojunction photocatalyst. The method employs a one-step perovskite conversion process. First, indium chloride, zinc chloride, and TAA are reacted in anhydrous ethanol to obtain ZnIn2S4. Then, the obtained ZnIn2S4, CsBr, and BiBr3 are added to DMSO to prepare a precursor solution, which is then injected into isopropanol to obtain Cs3Bi2Br9 / ZnIn2S4. Finally, the solution is dispersed in deionized water to obtain the Bi-doped ZnIn2S4 / BiOBr photocatalyst. This invention shows significant effectiveness in treating organic dye wastewater, greatly improving wastewater treatment efficiency.