98 results about "Indium nitrate" patented technology

The invention discloses a hydrogel thin layer-foam-based solar evaporator and a preparation method and application thereof, and belongs to the field of water treatment. The invention provides a hydrogel thin layer-foam-based solar evaporator. The hydrogel thin layer-foam-based solar evaporator comprises a foam substrate, a photo-thermal layer and a hydrogel thin layer, a photo-thermal layer and a hydrogel thin layer are sequentially coated on the foam substrate, or the photo-thermal layer, the hydrogel thin layer and the photo-thermal layer are sequentially coated on the foam substrate. The photo-thermal layer is made of a carbon-based indium material and is obtained by mixing an indium nitrate solution and a trimesic acid solution, preparing a precursor through a hydrothermal method and calcining the precursor in a protective atmosphere. The hydrogel thin layer-foam-based solar evaporator has efficient evaporation rate and energy utilization efficiency, and under irradiation of one sun, the FCH evaporation rate and the energy efficiency are 7.93 kgm <-2 > h <-1 > and 315% respectively; in addition, the compound also shows excellent salt resistance in 3.5-20wt.% of saline water, and also has a relatively high evaporation rate in acid-base and various dye sewage.

The invention relates to a manganese zinc ferrite composite magnetic catalyst and a preparation method thereof. The preparation method comprises the following steps: adding manganese nitrate, zinc nitrate and ferric nitrate into deionized water to form a metal ion solution; the preparation method comprises the following steps: adding ethylenediaminetetraacetic acid into a metal ion solution to form sol, performing heating dehydration treatment, grinding, and performing heat treatment to obtain manganese zinc ferrite nanoparticles; dissolving calcium nitrate, indium nitrate and thioacetamide in deionized water, then adding the manganese zinc ferrite nanoparticles to obtain a suspension of a reaction mixture, carrying out hydrothermal reaction, and carrying out subsequent extraction treatment to obtain the manganese zinc ferrite composite magnetic catalyst. The composite magnetic catalyst is prepared by utilizing a two-step hydrothermal method, the photocatalytic performance of the composite magnetic catalyst is remarkably improved, and the composite magnetic catalyst can be quickly and completely recycled through magnet adsorption, so that the photocatalytic performance of a single catalyst is improved, and quick recycling and cyclic utilization of the photocatalyst are realized; and the application cost of photocatalysis is reduced.

The invention relates to the field of solder materials, and provides a non-ferrous metal solder for low-temperature brazing and application, the solder is composed of carbon-coated copper nanorods, tin-bismuth alloy-coated silver nanoparticles, 2-mercaptobenzimidazole, rosin resin, an organic active agent, a dispersing agent, ionic liquid, hydroxyethyl cellulose, indium nitrate and citric acid. The silver particles are of a core-shell structure and are coated with tin-bismuth alloy layers, and continuous carbon layers are formed on the surfaces of the copper nanorods, so that the conductivity and the interface stability of the solder are effectively improved. The non-ferrous metal solder with excellent conductivity, low melting point and good wettability is prepared through step-by-step mixing, hot press molding and low-temperature heat treatment processes, and is suitable for electronic device packaging, power device connection and flexible circuit interconnection, and the defects of existing solder in the aspects of low-temperature welding and high conductivity are overcome.

The invention provides a functional filler, a preparation method thereof, an inorganic thermal control coating and application, and belongs to the technical field of coatings. The preparation method of the functional filler comprises the following steps: by taking a zinc acetate aqueous solution as a raw material, adding indium nitrate and aluminum nitrate, stirring and dissolving, then sequentially adding a complexing agent and a stabilizer, heating in a water bath to form transparent gel, and finally sintering at high temperature. According to the preparation method, a sol-gel method and a high-temperature sintering process are adopted to dope an indium element and an aluminum element into zinc oxide to prepare indium-aluminum co-doped zinc oxide, and then the indium-aluminum co-doped zinc oxide is used as a functional filler to be added into inorganic silicate resin to prepare the inorganic thermal control coating. The aluminum element and the indium element can synergistically act to improve the temperature resistance of the coating, so that the inorganic silicate coating with protection and thermal control effects is obtained, can be used on the surface of a spacecraft and has good thermal control and temperature resistance effects.

The application discloses an indium-based oxide catalyst, which is prepared by the following method: step one, adding indium nitrate, isophthalic acid, DMF, acetonitrile, imidazole and nitric acid into a reaction kettle, reacting at 80 DEG C for 12 hours, then heating to 100 DEG C and reacting for 24 hours, washing with DMF and anhydrous ethanol respectively, and vacuum drying for 12 hours to obtain an In-MOF precursor; step two, keeping the In-MOF precursor under the condition of nitrogen atmosphere and 200-600 DEG C for 4 hours, and naturally cooling to room temperature to obtain the indium-based oxide catalyst. Most of the prepared indium-based oxide catalysts still retain the corresponding three-dimensional hierarchical porous framework structure of the original MOF; the indium-based oxide catalyst contains highly dispersed metal active sites inside, effectively reduces the aggregation of metal oxides or metal elements, and thus exhibits more excellent catalytic activity; the organic ligand isophthalic acid generates a large amount of carbon material through pyrolysis under an inert atmosphere, greatly improving the conductivity of the indium-based oxide catalyst.

The invention belongs to the field of gas sensors, and discloses an indium oxide composite material based on palladium doping and a preparation method and application thereof.The preparation method comprises the steps that indium nitrate, absolute ethyl alcohol, ammonia water and deionized water are used for preparing an indium oxide material, then palladium ions are doped in an indium oxide solution to obtain a palladium ion-doped indium oxide solution, and the palladium ion-doped indium oxide solution is subjected to vacuum drying to obtain the palladium ion-doped indium oxide composite material. And reducing and centrifuging by using sodium borohydride to obtain a palladium-doped indium oxide composite material, and then preparing the palladium-doped indium oxide composite material into the gas sensor. The key technological process design of the preparation method is improved, so that the problems that the reaction of a pure indium oxide gas sensor needs relatively high activation energy and the surface of a pure semiconductor lacks selectivity to sulfide can be effectively solved, and the detection of dimethyl disulfide gas is realized.

The invention discloses an electrochemical preparation method of a component-controllable indium-indium oxide nanosphere composite catalyst and CO2 reduction application of the component-controllable indium-indium oxide nanosphere composite catalyst. The component-controllable indium-indium oxide nanosphere composite catalyst is prepared from indium nitrate, urea, trisodium citrate, deionized water, absolute ethyl alcohol, a carbon paper electrode and Nafion. Different indium oxide nanosphere precursors are synthesized under the high-temperature and high-pressure reaction conditions of a one-step hydrothermal method, the precursors are placed in a muffle furnace to be subjected to high-temperature calcination to obtain indium oxide nanospheres, the obtained indium oxide nanospheres are subjected to electrode sheet preparation, and the indium-indium oxide nanosphere composite catalyst with controllable components is obtained through electrochemical reduction treatment. The composite material is applied to CO2 electrochemical reduction.

The invention belongs to the technical field of catalysts and application thereof, and relates to an indium oxide catalyst for carbon dioxide conversion and a preparation method and application thereof.The preparation method comprises the following steps that S1, an indium oxide precursor is prepared, specifically, indium nitrate serves as a raw material, and the indium oxide precursor is prepared through a precipitation method; and S2, catalyst preparation: placing the obtained indium oxide precursor in a dielectric barrier discharge system, and treating at the power of 50-60W for 15-20 minutes to obtain the indium oxide catalyst. The indium oxide catalyst is prepared through a dielectric barrier discharge technology, has very high catalytic activity, and can improve the conversion rate of carbon dioxide in the process of converting carbon dioxide into carbon monoxide.

The invention belongs to the field of catalytic materials, and particularly relates to a preparation method and application of a bismuth oxybromide / indium oxide heterojunction photocatalytic material. The method specifically comprises the following steps: dispersing indium nitrate pentahydrate and p-dibenzoic acid in dimethylformamide, then carrying out hydrothermal reaction on the obtained mixed solution, collecting the product, washing and drying to obtain an indium oxide precursor; dispersing bismuth nitrate pentahydrate, sodium bromide and indium oxide precursors into deionized water, stirring, drying and collecting a white product; and calcining the obtained white product to obtain the bismuth oxybromide / indium oxide photocatalytic material. The obtained composite photocatalytic material is controllable in morphology, and rapid light degradation of tetracycline can be achieved.

The invention belongs to the technical field of gas sensors, and particularly relates to an n-butyl alcohol gas sensor composite material and a preparation and use method thereof. In the prior art, the response effect of single In2O3 and CoSnO3 on n-butyl alcohol is not ideal. A precursor CoSn (OH) 6 is prepared from an aqueous solution of cobalt sulfate and sodium stannate, a precursor In (OH) 3 is prepared from an aqueous solution of indium nitrate through a hydrothermal reaction, the CoSn (OH) 6 and the In (OH) 3 are mixed, ground and calcined, and the CoSnO3-In2O3 composite material is obtained. A sensor prepared from the composite material has high sensitivity, good selectivity and repeatability to n-butyl alcohol at 250 DEG C, the detection limit is as low as 20 ppb, and the sensor has good practical application value.

The invention discloses preparation of a NiIn2O4 / CeO2 composite material and application of the NiIn2O4 / CeO2 composite material in rifampicin detection, and belongs to the technical field of electrochemical sensing. The preparation method of the NiIn2O4 / CeO2 composite material comprises the following steps: (1) preparing In2O3 from DMF (Dimethyl Formamide), pyridine, indium nitrate hydrate and terephthalic acid; (2) preparing NiIn2O4 by adopting In2O3 and Ni (NO3) 2.6 H2O; and (3) preparing the NiIn2O4 / CeO2 composite material from NiIn2O4, a cerous nitrate solution and a urotropine solution. The NiIn2O4 / CeO2 composite material disclosed by the invention is used for preparing a corresponding electrochemical sensor, and the electrochemical sensor is used for detecting the content of rifampicin and has good sensitivity, reliable reproducibility and relatively high stability.

The application discloses a synthesis method of nitrogen-doped carbon-coated In2O3-CdSe hexagonal nanorod, and comprises the following steps: dissolving indium nitrate tetrahydrate and terephthalic acid in an organic solvent, transferring the mixture into a reaction kettle after ultrasonic treatment for 10 minutes, heating the mixture for a period of time, centrifuging and collecting the product after the reaction is completed, cleaning the product with ethanol, and drying the product to obtain a MIL-68-In precursor with a hexagonal nanorod structure; dispersing the MIL-68-In precursor in an organic solvent containing dissolved cadmium acetate, transferring the mixture into a reaction kettle after ultrasonic treatment for 10 minutes, heating the mixture for a period of time, centrifuging and collecting the product after the reaction is completed, cleaning the product with ethanol for several times, drying the product, and using the product for further use, and then calcining the synthesized sample and selenium powder in a tube furnace to obtain In2O3-CdSe@N-C. The application synthesizes the In2O3-CdSe@N-C hexagonal nanorod photocatalyst through a solvothermal and calcination method, and the synthesized photocatalyst has higher photocatalytic activity than the MIL-68-In.

The invention provides a preparation method and application of a plasma-assisted catalyst for preparing methanol through CO2 hydrogenation, and belongs to the field of catalysts. Raw materials adopted by the method comprise biomass, metal salt and a precipitator, the molar ratio of the biomass to the metal salt is (0.05-1): 1, the biomass is one of chitosan, hyaluronic acid and alginic acid, and the metal salt is one or more of indium nitrate, cobalt nitrate, zirconium nitrate, zirconyl nitrate, titanium sulfate and aluminum nitrate; the catalyst is subjected to nitrogen doping and / or more oxygen vacancy metal interfaces are formed through combination of coprecipitation and plasma treatment, so that the carbon dioxide adsorption and activation capacity and the overall hydrogenation efficiency of the catalyst in the process of preparing methanol through carbon dioxide hydrogenation are effectively improved.

The invention discloses a nitrogen-doped graphene composite material and a preparation method thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: S1, preparing a nitrogen-doped graphene material; s2, dissolving indium nitrate, 2-amino-benzothiazole and the nitrogen-doped graphene material in a DMF (Dimethyl Formamide) aqueous solution, carrying out hydrothermal reaction, cooling to room temperature, washing and freeze-drying to obtain a nitrogen-doped graphene / indium-based MOF (Metal Organic Framework) material; and S3, adding the nitrogen-doped graphene / indium-based MOF material into the lead acetate dispersion liquid, carrying out ultrasonic treatment, stirring and uniformly mixing, dropwise adding a 2g / L sodium hydroxide solution into the mixed liquid in a stirring state until the solution Ph is 8, then carrying out freeze drying, putting a dried sample into a tubular furnace, and calcining in an inert atmosphere to obtain the nitrogen-doped graphene composite material. When the prepared composite material is applied to the negative electrode of the lead-acid battery, the hydrogen evolution side reaction in the charging process of the negative electrode plate can be remarkably reduced, and the electrochemical performance of the battery is improved.

The invention discloses a preparation method of an Eu-Tb-In-MOF material based on a dual fluorescence emission source type, and the preparation method specifically comprises the following steps: under a closed condition, uniformly mixing terbium nitrate hexahydrate, europium nitrate hexahydrate, indium nitrate pentahydrate, an organic ligand, N, N-dimethylformamide and acetonitrile, then adjusting the pH value of a mixed solution, and carrying out solvothermal reaction, washing, filtering and drying to obtain the Eu-Tb-In-MOF material. The invention also discloses an application of the Eu-Tb-In-MOF material in identification of heavy metal ions Cr in a water environment. The Cr (VI) ions in the water environment are detected through fluorescence quenching sensing, excellent high selectivity is shown, and interference of other single and mixed anions and cations in the water environment can be resisted.

The invention discloses a preparation method of an efficient bionic photocatalytic material. The preparation method comprises the following steps: soaking rose leaves in a glutaraldehyde solution; soaking the rose leaves in a hydrochloric acid solution; the pretreated rose leaves are placed in a tetrabutyl titanate solution, and a precursor material A is obtained; oxidizing cobalt hydroxide into cobalt oxide in a muffle furnace to obtain a precursor material B; depositing indium nitrate on the precursor material B to obtain a precursor material C; calcining the precursor material C in a muffle furnace, removing part of the biological template, and converting the remaining biological template into a biological carbon carrier; placing the carbon-based bionic photocatalyst in an N2 inert gas protective atmosphere, and calcining the carbon-based bionic photocatalyst in a tubular furnace; and taking out the calcined material, cooling to room temperature, and cleaning the cooled material for multiple times to obtain the bionic photocatalyst. The preparation method of the efficient bionic photocatalytic material is used for efficiently degrading organic matters in water.

This invention discloses a defect-state indium oxide photothermal catalyst, its preparation method, and its application. The catalyst is indium oxide (In₂O) containing oxygen vacancies. 3‑x The catalyst exhibits a co-doped cubic and hexagonal crystal structure. The oxygen defects include oxygen vacancies and unsaturated In(III) sites associated with these vacancies. The preparation method involves a solvothermal reaction of indium nitrate and urea in a 50-95 v / v% ethanol aqueous solution to obtain the precursor c / h-InOOH. The precursor is then calcined to obtain c / h-In2O3. Finally, c / h-In2O3 is heat-treated with a reducing agent to construct oxygen defects. This invention, through crystal doping and the synergistic structure of oxygen defects in In2O3, enables the catalyst to possess full-spectrum absorption capabilities, more efficient carrier separation capabilities, and photothermal synergistic capabilities, thereby improving the efficiency of photothermal catalytic degradation of PFOA.

The invention belongs to the technical field of wave-absorbing materials, and particularly relates to an InNi3C0.5 / Ni-coated C composite wave-absorbing material and a preparation method thereof. The preparation method comprises the following steps: preparing a Ni-MOFs precursor by taking nickel nitrate and terephthalic acid as raw materials and adopting a solvothermal method, doping indium nitrate with different concentrations into the precursor through an ion exchange strategy to prepare an In / Ni-MOFs composite material, and carrying out high-temperature carbonization treatment on the In / Ni-MOFs composite material to finally obtain the spherical porous composite material. The spherical structure of the composite material provided by the invention can provide an axial carrier channel, promote jumping and migration of electrons, form an effective conductive network and enhance the wave absorbing performance. The problems of poor impedance matching, high density and high filling rate of the traditional carbide are solved, the preparation process is simple, the raw material cost is low, and the prepared wave-absorbing material has the characteristics of strong absorption, wide band and low thickness.

The invention discloses a CuO / In2O3 two-dimensional porous nanosheet gas sensitive material, a gas sensitive element and application of the gas sensitive element. A mixture of deionized water, ethanol and ethylene glycol is used as a solvent, indium nitrate is used as a precursor, and two-dimensional porous flaky indium oxide is obtained through hydrothermal and calcination treatment. Then, indium oxide is used as a matrix, copper oxide nanoparticles are compounded on the surface, and the CuO / In2O3 composite gas-sensitive material is obtained. The composite gas-sensitive material is a two-dimensional porous sheet, the two-dimensional porous sheet has a large effective surface area, the porous structure provides a rapid and continuous charge transfer channel and a gas diffusion channel, and CuO provides an alkaline site for adsorption of acidic H2S gas, so that the gas-sensitive material can be used as a gas-sensitive material for adsorption of acidic H2S gas. The CuO / In2O3 gas sensor has the advantages of high sensitivity, high selectivity, fast response and low detection limit on H2S gas at room temperature. The CuO / In2O3 composite gas-sensitive material prepared by the invention has a wide application prospect in the aspect of H2S gas detection, and the CuO / In2O3 composite gas-sensitive material is simple in synthesis process, short in synthesis time, low in cost and suitable for mass production.

The invention relates to a ZnO / In2O3 heterojunction photocatalyst as well as a preparation method and application thereof. The method comprises the following steps: (1) ultrasonically dissolving KOH in absolute ethyl alcohol to form a solution A; dissolving zinc acetate in absolute ethyl alcohol to obtain a solution B; dropwise adding the solution A into the solution B at room temperature, stirring, adding ethyl acetate, continuously stirring, washing and centrifuging the prepared ZnO QDs-containing solution with ethanol and water respectively, and re-dispersing in absolute ethyl alcohol to obtain synthesized ZnO quantum dots; (2) dissolving indium nitrate and polyvinylpyrrolidone in a mixed solution of ethanol and N, N-dimethylformamide, and stirring at room temperature; putting the stirred solution into an electrostatic spinning instrument; drying the obtained fibers, and preserving heat in an air atmosphere to obtain In2O3 nanofibers; and (3) performing ultrasonic mixing on the ZnO quantum dots and the In2O3 nanofibers, and then performing centrifugal drying to obtain the ZnO QDs / In2O3 nanofiber heterojunction optical composite material catalyst. The photocatalytic performance is remarkably improved.

The invention belongs to the technical field of catalysts, and provides a catalyst for preparing methanol through carbon dioxide hydrogenation and a preparation method of the catalyst. The preparation method comprises the following steps: firstly, taking indium nitrate and zirconyl nitrate hydrate as a metal precursor, adding citric acid, CTAB (Cetyltrimethyl Ammonium Bromide) and PVP (Polyvinyl Pyrrolidone), and carrying out hydrothermal and calcining to obtain an In2O3-ZrO2 compound with high thermal stability and Lewis acid sites; secondly, the In2O3-ZrO2 compound and MOF are combined and carbonized, and a C-MOF (at) In2O3-ZrO2 compound is obtained; mixing the C-MOF (at) In2O3-ZrO2 compound with an ionic liquid, heating the mixture, and then rapidly cooling the mixture to obtain an IL (at) C-MOF (at) In2O3-ZrO2 compound; and carrying out weak reduction treatment on the IL-coated C-MOF-coated In2O3-ZrO2 compound in an H2 / Ar atmosphere, and introducing additional oxygen vacancies to obtain the catalyst for preparing methanol through carbon dioxide hydrogenation.

The application discloses a kind of synthesis method for preparing structure is hydrangea-like MnCdS / In2S3 / NiAl-LDH photocatalyst by two-step hydrothermal method, belong to composite material and photocatalytic technical field.Sulfaceticamide (TAA), cadmium acetate dihydrate ((CH3COO)2Cd·2H2O), manganese acetate tetrahydrate (Mn(CH3COO)2·4H2O), indium nitrate 4.5 hydrate (In(NO3)3·4.5H2O), nickel nitrate hexahydrate (Ni(NO3)2·6H2O), aluminum nitrate nonahydrate (Al(NO3)3·9H2O), ammonium fluoride (NH4F), urea (CO(NH2)2) are used as raw materials, monomer is treated by two-step hydrothermal method, and hydrangea-like MnCdS / In2S3 / NiAl-LDH composite photocatalyst is obtained.The surface morphology, microstructure and photocatalytic activity are determined, and the product performance is greatly improved in the photocatalysis of degrading organic pollutants crystal violet and photolysis water to produce hydrogen.

The invention relates to a low-temperature gas-sensitive material with an In2O3 layer grown on the surface of ZnSnO3 and a preparation method thereof, ZnSnO3 is Archimedes particles, three quadrilateral surfaces are arranged around each triangular surface in the multi-dimensional surfaces of the Archimedes, each quadrilateral surface and the triangular surface share the same edge, In2O3 nanoparticles uniformly grow on the multi-dimensional surfaces of the ZnSnO3 Archimedes particles, and the In2O3 nanoparticles are uniformly distributed on the multi-dimensional surfaces of the ZnSnO3 Archimedes particles. And a uniformly distributed In2O3 particle composite layer is formed. The method comprises the following steps: dissolving zinc oxalate into deionized water, adding tin chloride, adding sodium hydroxide particles, dropwise adding an indium nitrate solution, carrying out a hydrothermal reaction, centrifuging, washing, drying, and finally calcining. The ZnSnO3 / In2O3 composite material is higher in base resistance in air, high in sensitivity to ethylene glycol gas and triethylamine gas and low in working temperature. The method is low in preparation cost and has a good industrial application prospect.

The present application relates to a kind of indium-poor tungsten bronze phase mosaic block assembled composite material and its preparation method, and the indium-poor tungsten bronze phase mosaic block assembled composite material is by In 0.02 WO3 is formed by WO3 compound, there are many tunnels consisting of the interval between tungsten and oxygen atom in the indium-poor tungsten bronze phase mosaic block assembled composite material, and indium ions are randomly distributed on both sides of the tunnel center position.Method: step one, create supersaturated sodium sulfate solution environment;Step two, in the supersaturated sodium sulfate solution environment obtained in step one, add indium nitrate, add NH4Cl hydrothermal reaction;Step three, centrifugation;Step four, sodium tungstate, oxalic acid and ammonium chloride are sequentially added to deionized water, drop into HCL, add the product of step three hydrothermal reaction, centrifugation and washing, finally the indium-poor tungsten bronze phase mosaic block assembled composite material is prepared.The material has high sensitivity to acetone gas, and the working temperature is low.

The application discloses a preparation method and application of Yb and Er co-doped S-type heterojunction, and the Yb and Er co-doped S-type heterojunction is synthesized by using indium nitrate, silver nitrate and thioacetamide as raw materials, through a hydrothermal method, AgIn5S8 is synthesized by etching Ti3AlC2 through HF, Ti3C2T x MXene. Bismuth nitrate and potassium chloride are used as raw materials, a certain amount of ytterbium nitrate, erbium nitrate, AgIn5S8 and MXene are added, then a Yb and Er co-doped BiOCl / MXene / AgIn5S8 composite material is synthesized through an in-situ hydrothermal growth method, and the catalyst is applied to degradation of wastewater containing tetracycline hydrochloride, can realize effective degradation of antibiotic wastewater under visible light and near-infrared light respectively. Meanwhile, the catalyst has full-spectrum response performance, can fully utilize clean energy solar energy, and realizes efficient purification of water pollutants.

A UV photodetector based on amorphous In-doped Ga2O3 nanomaterials and a preparation method thereof belong to the field of UV photodetection technology. The UV photodetector is composed of a quartz substrate, an amorphous In-doped Ga2O3 nanomaterial photosensitive layer and an Au metal interdigital electrode. First, the quartz substrate is cleaned and dried, and then gallium nitrate nine hydrate, indium nitrate four hydrate, polyoxyethylene lauryl ether and citric acid are added to deionized water to obtain an In-doped Ga2O3 precursor solution; then the precursor solution is spin-coated on the quartz substrate, and after drying, substrate cooling and sintering, an amorphous In-doped Ga2O3 nanomaterial photosensitive layer is obtained; finally, after photolithography and magnetron sputtering, an Au metal interdigital electrode is obtained on the photosensitive layer; thus, a UV photodetector based on amorphous In-doped Ga2O3 nanomaterials with simple process, few steps, low cost and high response to UV light is prepared.

The invention discloses a preparation method and an application of a ZnIn2S4-based heterojunction material. The preparation method comprises the following steps: dissolving indium nitrate, zinc nitrate and thioacetamide into a solvent, carrying out solvothermal treatment, cooling, centrifuging, and drying to obtain the ZnS / ZnIn2S4 material. The composite material is obtained through a one-step water method, and preparation is simple. The heterojunction material is obtained through a one-step method, a tighter interface is achieved, an interface electric field is constructed, separation of electron-hole pairs is promoted, electron transmission is facilitated, the photocatalytic reaction efficiency is improved, and then the photocatalytic activity is improved. When the photocatalyst is applied to photocatalytic benzyl alcohol oxidation, the photocatalytic efficiency of the photocatalyst is remarkably improved, and controllable product selectivity is realized. According to the method, benzyl alcohol is almost completely converted within 1 h, the reaction rate is as high as 10 mmol g <-1 > h <-1 >, the selectivity of obtained benzaldehyde is 98.2%, and in addition, the selectivity of C-C products is 86.2%.

The application relates to an indium-doped copper oxide electrode for electrocatalytic reduction of CO2 and a preparation method thereof, and belongs to the technical field of electrocatalytic reduction. Copper chloride and indium nitrate are used as raw materials, sodium hydroxide is used as a precipitant, a precursor is obtained through co-precipitation, the precursor is decomposed through heating, centrifugal washing and vacuum drying, and an indium-doped copper oxide catalyst is obtained, ink is prepared by mixing water, ethanol and a naphthol solution, the ink is uniformly coated on carbon paper and dried to obtain the indium-doped copper oxide electrode. The prepared indium-doped copper oxide electrode has high catalytic activity and good stability, indium atoms are doped in the copper oxide crystal lattice, the kinetics of the catalyst is improved, the desorption of carbon monoxide from the surface is accelerated, the doping of indium can improve the stability of the catalyst and inhibit the generation of hydrogen, a competitive product. The operation process is simple, raw materials are easy to obtain, no pollution is caused, no expensive equipment is needed, and the application has a wide application prospect.

The application discloses a preparation method of a hydrogen molybdenum bronze-sulfur indium zinc composite photocatalyst and belongs to the technical field of nanometer material preparation. Sodium molybdate is used as a precursor, is dispersed in water, nitric acid is added, and molybdenum trioxide is obtained through aging; then the molybdenum trioxide is dispersed in water, zinc sulfate, indium nitrate and thioacetamide are added, and MoO3-ZIS is obtained through hydrothermal reaction; the obtained MoO3-ZIS is added into an aqueous nitric acid solution, and H x MoO3-ZIS composite is generated through irradiation. The preparation method of the hydrogen molybdenum bronze-sulfur indium zinc composite photocatalyst is simple in preparation process, convenient in operation, high in yield, and stable in product performance.

The application belongs to the field of gas sensors, discloses a kind of indium oxide composite material based on palladium doping and its preparation method and application, its preparation process is to utilize indium nitrate, anhydrous ethanol, ammonia, deionized water to prepare indium oxide material, then doping palladium ion in indium oxide solution to obtain palladium ion doped indium oxide solution, using sodium borohydride reduction, centrifugal to obtain palladium doped indium oxide composite material, then prepare into gas sensor.The application can effectively solve the problems of high activation energy required for pure indium oxide gas sensor reaction and lack of selectivity of pure semiconductor surface to sulfide by improving the design of key process flow of preparation method, and realizes the detection of dimethyl disulfide gas.