232results about How to "Broaden the range of light absorption" patented technology

The invention relates to an integrated solar battery based on a perovskite solar battery and a bulk heterojunction solar battery and a preparation method thereof. The integrated solar battery comprises a transparent electrode, a hole transport layer, a perovskite light absorbing layer, an organic substance blending layer, a random hole block layer and a metal electrode in sequence from the bottom to top. Through preparing the perovskite solar battery and the bulk heterojunction solar battery into the integrated battery, the integrated solar battery based on the perovskite solar battery and the bulk heterojunction solar battery overcomes the disadvantages of narrow light absorbing range of the perovskite solar battery and weak visible light region absorption of the narrow-gap bulk heterojunction solar battery, improves the sunlight use range and improves the energy conversion efficiency. The integrated battery has the similar features to a parallel battery, the conversion efficiency is capable of breaking through the theoretical boundary of the energy conversion efficiency of the single-junction solar battery, and the application prospect is good.

The invention relates to a new preparation method of a ZnIn2S4 / TiO2Z system composite photocatalyst. The new preparation method comprises the following steps: (1) taking commercial P25 and sodium hydroxide solution as raw materials, performing hydrothermal treatment at 180DEG C for 48h, and performing replacement with H+ to obtain a H2Ti3O7 nanobelt, performing hydrothermal treatment through dilute sulfuric acid at 100DEG C, and performing high temperature calcination at 600DCG C to obtain a TiO2 nanobelt with rough surface; and (2) weighing zinc chloride, indium chloride, and thioacetamide according to a 1:2:4 molar ratio of Zn, In and S, and dissolving the zinc chloride, indium chloride, and thioacetamide into ethylene glycol to obtain a mixture, then dispersing the obtained TiO2 nanobelt into the mixture ultrasonically, performing treatment at 120DEG C for 2h, performing centrifugation and separation on the obtained mixture, and then performing oven-drying for 10h to obtain the ZnIn2S4 / TiO2Z system composite photocatalyst. According to the new preparation method, the obtained novel composite photocatalyst has an excellent performance on catalytic reduction of CO2 under a simulated sunlight condition; and the raw materials are inexpensive, and the technology is simple, so that the product cost is effectively reduced, a light absorption range is broadened, and utilization ratio of sunlight is improved, and the composite photocatalyst has a very high practical value and an application prospect.

The invention relates to a ZnO loaded mesoporous mpg-C3N4 composite photocatalyst and a preparation method thereof. The method comprises the following steps: weighing mpg-C3N4 powder, ultrasonically dispersing the mpg-C3N4 powder into ethylene glycol, and stirring; weighing Zn(CH3COO) 2.2H2O, ultrasonically dissolving Zn(CH3COO)2.2H2O into ethylene glycol, adding the solution into the dispersion liquid, and stirring; weighing sodium hydroxide, dissolving the sodium hydroxide into ethylene glycol, adding the ethylene glycol solution into the formed solution and stirring; heating the finally-obtained solution in a solvent at a temperature of 160 DEG C for 24 hours; and centrifuging, washing and drying the obtained precipitate to obtain the ZnO loaded mesoporous mpg-C3N4 composite photocatalyst. The ZnO loaded mesoporous mpg-C3N4 composite photocatalyst provided by the invention has excellent pollutant catalytic degradation functions of visible light and simulated sunlight; the preparation method provided by the invention is cheap in raw materials and simple in process, thereby effectively reducing the product cost, expanding the light absorption range by the composition of the two components, improving the utilization rate of sunlight and having very high practical value and application prospect.

The invention discloses a modified graphite phase carbon nitride photocatalyst as well as a preparation method and application thereof. The modified graphite phase carbon nitride photocatalyst is prepared from urea and salicylic acid serving as raw materials by virtue of calcination, wherein a mass ratio of urea to salicylic acid is 1:(0.002-0.02). The modified graphite phase carbon nitride photocatalyst disclosed by the invention has the advantages of being high in specific surface area, wide in light absorption range, low in electron-hole pair recombination rate, excellent in photocatalyticperformance and the like, and has multiple reactive sites, excellent application value and application prospects. The preparation method has the advantages of being simple in process, wide in raw material source, low in cost, high in preparation efficiency, high in yield and the like, is suitable for large-scale preparation and is favorable for industrial production. The modified graphite phase carbon nitride photocatalyst disclosed by the invention can be used for degrading organic pollutants, has the advantages of being simple in process, convenient to operate, low in cost, high in treatmentefficiency, excellent in degradation effect and the like, and has excellent effects of degrading the various organic pollutants.

The invention discloses a copolymerization modified ordered mesoporous carbon nitride photocatalyst and a preparation method and an application thereof, belonging to the technical field of material preparation and photocatalysis. The copolymerization modified ordered mesoporous carbon nitride photocatalyst is obtained by taking cyanamide and organic small molecular monomer (3-aminothiophene-2-formonitrile) as precursors, and SBA-15 type ordered mesoporous silica as a hard template, through high-temperature thermal polymerization under inert atmosphere, and etching with ammonium hydrogen fluoride to remove the hard template. The copolymerization modified ordered mesoporous carbon nitride photocatalyst prepared by the preparation method has a microstructure in the shape of a cylindrical rod and regular mesoporous channels in two-dimensional hexagonal P6mm orderly arrangement, and is wide in response range of visible light. The copolymerization modified ordered mesoporous carbon nitride photocatalyst and the preparation method and the application thereof disclosed by the invention are easy in synthesis process, and high in catalytic efficiency, and can be applied to the photocatalysis fields of photolysis aquatic hydrogen, organic selective oxidation and the like.

The invention discloses preparation and application of an alpha-fetoprotein photoelectrochemical competitive immunosensor based on a double-sensitized structure. A sensing interface is constructed byusing titanium dioxide mesocrystals as a probe substrate and immobilizing an alpha-fetoprotein antibody (Ab), and using bismuth sulfide as an electrode substrate and immobilizing an alpha-fetoproteinantigen; the sensor with the double-sensitized structure is constructed by means of specific binding between an antigen and the antibody. An electrode modified with the alpha-fetoprotein antigen is placed in a mixed solution containing different concentrations of free antigen and a certain amount of labeled probes, and the free target antigen competes with the immobilized antigen for bonding to the labeled probes. Under the illumination condition, the electrode bonded with the probes can generate photocurrent with certain intensity, and the amplification of a current signal is realized by means of the double-sensitized structure. Furthermore, as the concentration of the free target material increases, the number of the probes bonded to the immobilized antigen decreases, and the photocurrent intensity is also reduced. Based on the phenomenon, a photoelectric analysis method for alpha-fetoprotein can be established.

The invention relates to a nano composite membrane photo-anode, in particular to preparation of a ZnFe2O4 / TiO2 nano composite membrane photo-anode used for photo-induced cathodic protection. Preparation is completed through the steps that firstly, a TiO2 nanotube array membrane is obtained through an anodic oxidation method; and secondly, the TiO2 nanotube array membrane is loaded with ZnFe2O4 nano particles through a hydrothermal method. The ZnFe2O4 / TiO2 composite membrane prepared through the method has the characteristic that a coating is complete and uniform, can be used as a photo-anode for utilizing visible light; the connected and protected metal electrode potential during light irradiation is greatly lowered; and when a light source is turned off, the nano composite membrane photo-anode can still have a certain cathodic protection effect on metal in a dark state.

The invention discloses a preparation method of a photocatalytic material for efficiently degrading methylene blue dye in wastewater. The preparation method comprises the following specific steps: preparing different triazine derivative solutions; preparing a supramolecular self-assembly; and preparing graphite-phase carbon nitride. Graphite-phase carbon nitride prepared by taking the supramolecular self-assembly as a precursor has a relatively large specific surface area and uniform structural morphology, so that the total amount of methylene blue adsorbed on the surface of carbon nitride isincreased, and the degradation efficiency of methylene blue dye is improved; when the graphite-phase carbon nitride prepared by the method disclosed by the invention is used for treating wastewater containing methylene blue dye, the degradation efficiency is high, and the stability is good; the photocatalytic material can be repeatedly used for multiple times, so that the treatment cost is favorably reduced; and possibility is provided for large-scale practical application.

The invention relates to a nucleic-acid aptamer type photoelectric sensor for detecting atrazine and a preparation method of such nucleic-acid aptamer type photoelectric sensor. The preparation method includes firstly, preparing a three-dimensionally ordered macroporous 3DOM TiO2 / FTO electrode; then, performing Au nanoparticle modification through a hydrothermal reduction method so as to obtain an Au NPs / 3DOM TiO2 / FTO composite electrode; finally, combining an atrazine aptamer onto the surface of the Au NPs / 3DOM TiO2 / FTO composite electrode through an Au-S bond self-assembled film method so as to obtain an Aptamer / Au NPs / 3dom TiO2 / FTO sensor electrode. Compared with the prior art, the nucleic-acid aptamer type photoelectric sensor for detecting the atrazine and the preparation method have the advantages that the nucleic-acid aptamer is used as an atrazine recognition element, so that sensor detection selectivity is improved greatly; since a three-dimensionally ordered macroporous Au NPs / 3DOM TiO2 / FTO composite material of a microstructure is used for recognizing the molecular load of nucleic-acid aptamer element, the photoelectric catalysis performance can be enhanced effectively, atrazine detection sensitivity is improved, the limit of detection is as low as ng / L, high selective recognition is achieved, and the nucleic-acid aptamer type photoelectric sensor can be applied to detection and analysis of trace pollutants accordingly.

The invention discloses a preparation method of a zinc-iron-aluminum hydrotalcite / titanium dioxide composite film photo-anode for photoproduction cathode protection and relates to composite film photo-anodes. The zinc-iron-aluminum hydrotalcite / titanium dioxide composite film photo-anode is prepared by loading a titanium dioxide nanotube with zinc-iron-aluminum hydrotalcite of a unique interlayerstructure. The visible light adsorbing performance of titanium dioxide is enhanced by loading the zinc-iron-aluminum hydrotalcite, and the separation efficiency of photoproduction electrons and electron holes can be improved due to the unique interlayer structure. Compared with pure titanium dioxide nanotubes, the composite film photo-anode prepared through the method has higher photocurrent density and potential fall and can effectively relieve corrosion to stainless steel.

The invention provides a dye solvent heat-sensitive MOFs photocatalyst, a preparation method and application thereof. The method includes: adding dye and MOF into a hydrothermal kettle lining containing a solvent for ultrasonic treatment, then loading the hydrothermal kettle lining into a hydrothermal kettle, conducting heat preservation at 80-200DEG C for 6-48h, and then performing natural cooling to the room temperature; at the end of the reaction, washing the precipitate until the washing liquid is colorless and transparent; and drying the washed sample to obtain the dye solvent heat-sensitive MOF photocatalyst. The visible light catalytic activity of the photocatalyst is as high as 2760micromolh<-1>g<-1>, which is 8 times or more that of normal-temperature sensitization. The preparation method effectively improves the visible light catalytic hydrogen production activity of MOF, and at the same time improves the stability of MOF. The method is simple to operate and good in repeatability, and the application of the MOFs in the field of visible light catalytic hydrogen production is expanded.

A disclosed conjugated polymer containing thienothiophene and di(benzothieno)benzodithiophene has the structural general formula shown in the specification. In the structural general formula, R1 and R2 are same and are H, C1-C10 alkyl or C1-C10 alkoxy, R3 is C1-C16 alkyl or C1-C16 alkoxy, and n is an integer of 5-60. According to the conjugated polymer containing thienothiophene and di(benzothieno)benzodithiophene, thienothiophene and di(benzothieno)benzodithiophene give play to synergistic effect, and help to further reduce the energy gap and expand the luminous absorption scope, and compared with conventional polymeric materials, the conjugated polymer containing thienothiophene and di(benzothieno)benzodithiophene has a relatively wide luminous absorption scope. The invention also discloses a preparation method of the conjugated polymer containing thienothiophene and di(benzothieno)benzodithiophene.

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 present invention relates to a titanium-tungsten alloy oxide nano-tube electrode with a characteristic of in-situ vertical growth, a preparation method and applications thereof, wherein the electrode can be applied in efficient photoelectric catalysis oxidation degradation of high concentration organic pollutants. According to the present invention, an argon arc melting method is adopted to prepare a titanium-tungsten (Ti-3W) alloy with uniform chemical components, and an electrochemical anodization method is adopted to generate a highly ordered Ti-W-O nano-tube array containing TiO2 and WO3 in a F<->-containing ethylene glycol solution; compared to the traditional tungsten ion-doped TiO2 nano-tubes and titanium-tungsten oxide composite films adopting TiO2 as a base, the titanium-tungsten alloy oxide nano-tube array of the present invention has characteristics of uniform dopant distribution, large specific surface area, high stability and high photoelectric catalysis performance; and the titanium-tungsten alloy oxide nano-tube electrode can be widely used in high concentration azo dye pollutant degradation researches, and has great environmental economic benefits.

The invention relates to a metal structure tungsten diselenide / redox graphene composite structure and a preparation method thereof. Firstly, a precursor aqueous solution of a WSE2 film is prepared; a monolayer graphene oxide aqueous solution and citric acid are added into the precursor aqueous solution of the WSE2 film to obtain a WSe2 / RGO precursor aqueous solution; then, after hydrothermal treatment at 165-180 DEG C, a thin-film metal structure tungsten diselenide / redox graphene composite structure is obtained on a polyethylene naphthol substrate inserted into the WSe2 / RGO precursor aqueous solution, and a precipitate in a residual solution after the hydrothermal treatment is filtered, washed and dried to obtain a powder metal structure tungsten diselenide / redox graphene composite structure. According to the invention, the preparation of metal structure tungsten diselenide can be realized through a one-step synthesis process through a hydrothermal method, and the preparation method is not only simple in process, but also has the excellent characteristics of low cost of used raw materials and equipment, low energy consumption, high efficiency and the like.

The invention discloses a nano titanium dioxide / copper sulphide nano composite material. Titanium dioxide nanowires are prepared by a hydrothermal method and are used as a reaction substrate, a compound structure of copper sulphide nanosheets and titanium dioxide nanowires is prepared successfully by a secondary hydrothermal method under the conditions that the temperature is 100 DEG C and the reaction time is 10 hours, meanwhile, influence of hydrothermal temperature and hydrothermal time to photocatalytic performance of the composite structure is researched. Copper sulphide is prepared into a sheet structure, the compound quantity of the copper sulphide and the titanium dioxide nanowires is increased, the copper sulphide nanosheets and the titanium dioxide nanowires form a heterostructure, the light absorption range of titanium dioxide is expanded, and finally, the photocatalytic efficiency of the composite structure is improved. In the method, equipment is simple, process parameters are controllable, and the repeatability is high. The prepared nano composite material has important application in the field of photocatalysts.

The invention discloses a method for producing an H-occupied BiVO4-OVs photocatalytic material and application of the H-occupied BiVO4-OVs photocatalytic material. The production method comprises thesteps of dissolving a certain molar weight of Bi(NO3)3.5 H2O in glycerin; dissolving a certain molar weight of NaVO3.2 H2O in deionized water; mixing solutions; transferring a mixed solution into a teflon-lined high-pressure kettle, and maintaining 180 DEG C for 8 h; conducting 10000-rpm centrifugal separation on a solvothermal synthesis product, washing the solvothermal synthesis product subjected to 10000-rpm centrifugal separation with deionized water and ethyl alcohol, and drying the washed solvothermal synthesis product subjected to 10000-rpm centrifugal separation at 60 DEG C for 4 h; calcining the solvothermal synthesis product, which is thoroughly washed, in a muffle furnace at 300 DEG C for 5 h; and conducting annealing on a calcined product in an Ar / H2 atmosphere at 350 DEG C for10 h to obtain the H-occupied BiVO4-OVs photocatalytic material. The H-occupied BiVO4-OVs photocatalytic material has the advantages that a photoresponse range is wide, the catalytic activity is high, the degradation rate is high, and the hydrolysis ability is high; and solar energy can be fully and effectively used.

The invention discloses a development and application method of a bismuth oxyhalide system material for processing organic pollutant efficiently. A novel semiconducting material which is low in synthesis cost, pollution-free and high in efficiency, and can use visible light to degrade organic pollutants can efficiently degrade pollutants in waste water, and fully mineralizes the pollutants into carbon dioxide and water, and accordingly no secondary pollutant is produced. Two aspects of synthesis technology and a material system are improved, wherein a low temperature precipitation method is adopted to synthesize a series of visible light catalysis degradation materials, and the system is mainly semiconducting materials doped with bismuth chloride oxide-I of a nanometer nuclear shell structure and compounded semiconducting materials of bismuth oxyiodide and bismuthyl bromide which are both of a slice sphere structure. The material system can be recycled and repeatedly used, and is still remarkable in degradation effect. The development and application method can be applied to printing and dyeing wastewater treatment, places materials on a fluidized bed or a fixed bed for lighting, and removes the organic pollutants with trace chemical oxygen demand and biochemical oxygen demand by deeply disposing. The bismuth oxyhalide system material can be widely applied to aspects of producing electron function materials, fire retardant, optical materials, medical composite materials, radiation proof materials and the like.

The invention provides a preparation method for a silver modified phosphotungstic acid / titanium dioxide composite membrane catalyst and relates to the preparation method for a composite membrane catalyst. The invention aims to solve the problem of low sunlight use ratio of a TiO2 / H3PW12O40 composite membrane catalyst and the problem of secondary pollution to environment of a powdered composite membrane catalyst. The preparation method comprises the following steps: 1) preparing a mixed solution of titanium tetraisopropoxide and isopropyl alcohol; 2) preparing the mixed solution of dissolved H3PW12O40 and isopropyl alcohol; 3) mixing the two solutions; 4) preparing a sol after hydro-thermal treatment; and 5) spinning and ageing. The composite membrane catalyst prepared according to the invention can further promote the photocatalytic activity of TiO2 / H3PW12O40 composite membrane and widen the response range thereof; the problems that most present catalysts are powdered, are difficult to be recycled and are easy to bring secondary pollution to the environment are solved; the preparation method is suitable for the preparation of the silver modified phosphotungstic acid / titanium dioxide composite membrane catalyst.

A process for preparing the modified multifunctional TiO2 photocatalyst includes such steps as mixing the alcohol solution of iron nitrate with Ti(Obu)4 solution, strong stirring while slowly dripping concentrated ammonia water, continuous stirring until full reaction, baking the resultant solution at 105 deg.C until constant weight, and calcining in the crucible in muffle furnace to obtain N and Fe doped and modified TiO2 nanopolycrystals with high photocatalytic activity.

The invention provides a preparation method of a ZnO / graphene photocatalyst. The preparation method comprises the following steps: (1) preparing growth-promoting liquid; (2) preparing seed crystal liquid; and (3) preparing ZnO / graphene: a, adding a proper amount of graphene oxide into the seed crystal liquid and heating to 80-90 DEG C, then preserving the heat for 30 minutes; washing and filtering, and drying at 120 DEG C for 1-2 hours for later use; b, putting a dried sample into the growth-promoting liquid and heating to 80-90 DEG C, then preserving the heat for one hour, washing and drying to obtain ZnO / graphene oxide; and c, putting the prepared ZnO / graphene oxide into an atmosphere reduction furnace and heating to 1000-1100 DEG C to be reduced for one hour under the protection of carrier gas, thereby finally obtaining the ZnO / graphene photocatalyst. The preparation method of the ZnO / graphene photocatalyst is simple in steps and low in cost; and the catalytic activity and the stability of the obtained ZnO / graphene photocatalyst are greatly improved and the ZnO / graphene photocatalyst is hopeful to be applied to photocatalysis treatment of industrial pollutants.

The invention relates to a conjugated polymer represented by the formula (P); wherein the R1 represents an alkyl group with a carbon number of 6 to 15, the R2 represents an H atom or an alkyl group with a carbon number of 1 to 16, the R3 represents an alkyl group with a carbon number of 1 to 17, and n is a natural number in a range of 5 to 60. The invention also relates to a preparation method and applications of the conjugated polymer. An acyl group is introduced into the a-position on one thiophene ring of benzotrithiophene, and then the length of alkanoyl can be adjusted so as to modulate the solubility and electron density of the conjugated polymer. Dithienobenzooxadiazole is an excellent electron acceptor unit. Benzotrithiophene is taken as the donor unit, an electron pushing-pulling effect between the donor unit and the strong electron acceptor unit (dithienobenzooxadiazole) reduces the energy gap of the conjugated polymer, and thus the light absorption range of the conjugated polymer is largely increased.

An embodiment of the invention relates to a photocatalyst, in particular to a double-ligand metal organic framework photocatalyst and application thereof. According to the double-ligand metal organicframework photocatalyst provided by the invention, a metal organic framework comprises double ligands including metalloporphyrin and organic ligand. According to the double-ligand metal organic framework photocatalyst provided by the invention, a double-ligand mechanism is introduced, so the separation of photo-generated holes and electrons is promoted, a light absorption range is expanded, and the photocatalytic reduction capability of CO2 can be remarkably improved.

The invention provides a sulfothiazole-dithienopyrrole-benzodithiophene-containing copolymer and its preparation method and use. The sulfothiazole-dithienopyrrole-benzodithiophene-containing copolymer is a compound P having the structural formula shown in the description and in the structural formula, R1 represents H, C1-C16 straight chain or branched chain alkyl, or C1-C16 straight chain or branched chain alkylmercapto group, R2 represents C1-C12 straight chain or branched chain alkyl or other groups shown in the description, R' represents C1-C12 straight chain or branched chain alkyl and n is an integer of 5-60. The sulfothiazole-dithienopyrrole-benzodithiophene-containing copolymer contains 4,8-bis(1,3-dithiol-2-aldehyde)benzo[1,2-b: 4,5-b']dithiophene derivative, sulfothiazole and dithienopyrrole units, has a high solar spectrum matching degree, and improves energy conversion efficiency.

The invention discloses a Mo-doped MoO3@ZnIn2S4Z system photocatalyst as well as a preparation method and application thereof. The Mo-doped and Z-system photocatalyst is constructed by adopting a one-step solvothermal method, and the Mo-doped MoO3@ZnIn2S4Z system photocatalyst is reasonably designed. In the process, a template agent and a surfactant are not used, so that a cocatalyst modification(noble metal) and heterojunction step-by-step construction process is avoided. The catalyst not only widens the light absorption range and improves the utilization efficiency of sunlight, but also greatly improves the energy band structure of the heterojunction and the separation efficiency of carriers, and shows excellent photocatalytic performance.

The embodiment of the invention relates to a fullerene carboxylic derivative modified photocatalyst / super-hydrophobic membrane composite material. The fullerene carboxylic derivative modified photocatalyst / super-hydrophobic membrane composite material comprises a super-hydrophobic membrane, the surface of the super-hydrophobic membrane is covered with a fullerene carboxylic derivative modified photocatalyst, the fullerene carboxylic derivative modified photocatalyst is prepared from at least one of a photocatalyst and a photocatalyst precursor and fullerene carboxylic derivatives. The composite material is novel in structure, excellent in performance and low in electron-hole recombination probability when adopted as the photocatalyst.

The invention discloses a method for preparing hydrogen peroxide by using an enol-ketone type covalent organic framework / graphite phase carbon nitride composite photocatalyst. The composite photocatalyst and an electron donor solution are mixed to carry out photocatalytic reaction to obtain hydrogen peroxide, wherein the composite photocatalyst comprises an enol-ketone type covalent organic framework and graphite phase carbon nitride, and the enol-ketone type covalent organic framework is loaded on the surface of the graphite phase carbon nitride. According to the invention, the adopted composite photocatalyst has the advantages of multiple reaction active sites, wide light absorption range, low electron-hole pair recombination rate, good photocatalytic performance, good stability, environmental protection and the like, when the composite photocatalyst is used for preparing hydrogen peroxide, the yield within 1 hour can reach 880.494 [mu]mol / L, and still reaches 861.445 [mu]mol / L after five times of circulation, and the composite photocatalyst has the advantages of simple method, high preparation efficiency, high yield and the like, and can be used for large-scale preparation of hydrogen peroxide and facilitates industrial application.

The invention relates to a semiconductor photosensitizer AgBiS2 quantum dot and a preparation method thereof. According to the technical scheme, the method comprises the steps: mixing a silver salt and a bismuth salt at a molar ratio of 1: (1-4) to obtain a mixture; mixing the mixture with oleylamine according to the concentration of 0.19-0.21 mol / L, and stirring under the conditions of nitrogen atmosphere, 100-120 DEG C and 500-800r / min to obtain a mixed precursor solution containing Ag < + > and Bi < 3 + >; mixing sublimed sulfur and 1-octadecene according to the concentration of 0.39-0.41 mol / L and stirred under the same conditions to prepare a precursor solution of sulfur; mixing the mixed precursor solution containing Ag < + > and Bi < 3 + > and the precursor solution of sulfur according to a volume ratio of 1: (0.9-1.1) at 190-210 DEG C in a nitrogen atmosphere, and stirring for 8-10min at 500-800r / min to obtain the semiconductor photosensitizer AgBiS2 quantum dot. The product prepared by the method is controllable in size, few in surface defects and excellent in photoresponse capability, and is beneficial to application in quantum dot sensitized solar cells.

The invention belongs to the field of inorganic nanometer materials and relates to a preparation method of a ZnO-loaded CdIn2S4 nano-cube composite catalyst and the application of the catalyst to the field of environmental governance. CdIn2S4 nano-cubes are synthesized by using cadmium nitrate tetrahydrate, indium nitrate monohydrate and thioacetamide as raw materials, and a ZnO-loaded CdIn2S4 nano-cube compound is synthesized through deposition and a hydrothermal method. The composite material has the advantages of large specific surface area, wide spectral response range, strong light-harvesting ability, convenience in separation of photon-generated carriers and the like and has very excellent solar photocatalytic degradation ability. A synergistic effect can be used in the ZnO-loaded CdIn2S4 nano-cube composite material, effective transfer and separation of the photon-generated carrier are realized, the light absorption range of the compound is widened, and effective degradation of tetracycline hydrochloride and ofloxacin by the compound under solar light is realized.

The invention belongs to the technical field of materials, and provides a preparation method and application of a modified material based on titanium dioxide, which comprises the following steps: dissolving a certain amount of boric acid and rhodium chloride trihydrate in water containing nitric acid and alcohol to obtain a solution A; dropwise adding isopropyl titanate into the ethanol solution at the temperature of 0-4 DEG C to obtain a solution B; slowly dropwise adding the solution A into the solution B to obtain titanium dioxide sol; aging the titanium dioxide sol at room temperature, andperforming drying to obtain xerogel; and finally, grinding the dry gel into powder, and calcining the powder in air for 4 hours to obtain the boron-rhodium co-doped titanium dioxide, namely the titanium dioxide-based modified material. The material is used for photocatalytic hydrogen production, and the catalytic hydrogen production efficiency is effectively improved. The boron-rhodium co-doped titanium dioxide is prepared by adopting a one-pot sol-gel method, the absorption bandwidth of the titanium dioxide can be regulated and controlled by adjusting the rhodium doping proportion, and the light absorption and carrier separation efficiency is improved.