86results about How to "Inhibitory complex" patented technology

The invention discloses a sulfur-rich vacancy ZnIn2S4 at FeNi < 0.48 > S < 1.71 > heterojunction photocatalyst as well as a preparation method and application thereof, and the photocatalyst is a sulfur-rich vacancy ZnIn2S4 at FeNi < 0.48 > S < 1.71 > heterojunction composite material with a hollow structure, which is formed by in-situ growth of a sulfur-vacancy-containing ZnIn2S4 nanosheet on the surface of a FeNi < 0.48 > S < 1.71 > hollow nanosphere. The photocatalyst provided by the invention has a larger specific surface area and a wider light absorption range, and the internal sulfur vacancy as an electron capture center can inhibit the compounding of photo-induced electron-hole pairs. The three-dimensional core-shell hollow sphere structure can reduce the recombination rate of charges, improve the mobility of electrons, show better photocatalytic performance, and have great application prospects in the fields of energy and environment.

The invention provides a GaN-based alpha particle detector and a preparation method thereof, the GaN-based alpha particle detector comprises a substrate and an epitaxial structure epitaxially formed on the substrate, and the epitaxial structure comprises a multi-quantum well layer. A multi-quantum well layer is introduced, the multi-quantum well layer absorbs incident energy of alpha particles and correspondingly excites a large number of electron-hole pairs, and the electron-hole pairs are limited in quantum wells by the quantum confinement effect of the multi-quantum well layer, so that not only is the loss of electron-hole pair diffusion and recombination reduced, but also the service life of current carriers is prolonged, and the performance of the device is improved. The carrier collection efficiency of the alpha particle detector is greatly improved, and more electron-hole pairs can be collected and converted into electric signals to be output, so that the performance of the alpha particle detector is improved.

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 discloses a large-scale new energy rapid power control transient calculation method and system, and relates to the technical field of large power grid transient calculation, and the method comprises the steps: modifying the power control instruction values of new energy power generation equipment in batches, and carrying out the pre-acceleration of a power outer ring, so as to achieve the purpose of actually changing the output value of the new energy power generation equipment. According to the specific implementation method, a new energy control plant-station set is configured, and power instructions of new energy power generation equipment in the plant-station set are uniformly increased or decreased according to a certain proportion, so that power instruction modification of a large number of equipment is realized; after the power instruction is modified, the difference value between the power instruction and the current actual power output value is calculated, integral operation is carried out on the difference value, an integral result serves as input of an original power outer ring, and the purpose of quickening response to the power instruction is achieved.

The invention discloses a highly antibacterial fabric and a preparation process thereof, and relates to the technical field of antibacterial fabrics, the highly antibacterial fabric comprises a composite fabric layer, an antibacterial adhesion layer, a zinc coating, a cotton fabric base material and a nano-silver antibacterial layer; the composite fabric layer is prepared from a polycaprolactone spinning solution and a polylactic acid spinning solution through electrostatic spinning, the polycaprolactone spinning solution is prepared from a polycaprolactone solution and a composite heterojunction suspension through mixing, and a composite heterojunction in the composite heterojunction suspension is prepared from sodium molybdate dihydrate and zinc through a hydrothermal method; the antibacterial adhesion layer is prepared from menthol modified polyacrylate; the zinc coating is prepared from a zinc target material through magnetron sputtering; the nano-silver antibacterial layer is prepared from hinokitiol modified chitosan through in-situ reduction of silver nitrate.

The invention discloses a preparation method of a supported photocatalyst and its application in pharmaceutical wastewater treatment, the polyimide polymer grafted on the surface of modified nano titanium dioxide contains a rigid aromatic imide ring structure, has a strong carbon forming property, and after high temperature calcination, a porous carbon material with a stable structure and carbon skeleton can be formed, and a nitrogen-doped structure such as pyrrole nitrogen and pyridine nitrogen is formed in the porous carbon matrix, tetracycline hydrochloride can be adsorbed by hydrogen bonding and π-π bond interactions, and tetracycline hydrochloride has a high adsorption rate and removal effect. The nano titanium dioxide of the present invention is evenly distributed in the porous carbon carrier, reducing the agglomeration of nano titanium dioxide, the better the dispersibility, the more photocatalytic active sites, the better the degradation performance of tetracycline hydrochloride, and the supported photocatalyst has a dual function of adsorption and photocatalytic degradation on tetracycline hydrochloride, thereby showing an excellent removal rate.

The invention discloses a back contact battery and a back contact battery assembly, and the battery comprises a substrate which is provided with a first doping type, the substrate is provided with a first surface, and the first surface is provided with a first side and a second side which are opposite to each other; the first doped regions are located on the side, provided with the first surface, of the substrate and arranged at intervals in the first direction, the first direction is the direction from the first edge to the second edge, the first doped regions are of the second doping type, and the doped regions closest to the first edge and / or the second edge are the first doped regions; and the second doped region is located between any adjacent first doped regions and forms an interdigital structure with the adjacent first doped regions. Wherein the first edge and the second edge of the substrate are provided with at least part of the first doped region, the doping type of the first doped region is opposite to that of the substrate, and a PN junction structure is formed at the edge region of the back contact cell, so that the edge region can be effectively prevented from being compounded, and the efficiency of the back contact cell is improved.

The invention relates to the technical field of photocatalytic processes, in particular to a catalyst for preparing methanol through photocatalytic reduction of CO2 as well as a preparation method and application of the catalyst. The catalyst comprises a composite carrier and active sites dispersed on the surface or in pores of the composite carrier, the composite carrier is of a heterojunction composite structure formed by a hollow TiO2 sphere and MCN, the hollow TiO2 sphere comprises a shell layer and a spherical cavity structure located in the shell layer, the shell layer is formed by TiO2 nanoparticles, and the MCN has a mesoporous pore structure; a II-type or Z-type heterojunction interface is formed between the hollow TiO2 spheres and the MCN through physical contact and chemical action; the active sites comprise copper nano species, sulfur vacancy defects and amino groups; the copper nano species are copper nano particles or clusters, and the valence state of copper is 0 and / or + 1 valence amino is grafted on the surface of the composite carrier through an organic long chain. The catalyst provided by the invention can greatly improve the yield and selectivity of methanol prepared by photocatalytic reduction of carbon dioxide.

The invention provides a molybdenum disulfide nano material rich in sulfur defects and a preparation method and application thereof, and belongs to the technical field of nano material preparation and sterilization. Starting from the properties of the molybdenum disulfide nano-material, sulfur defects with different concentrations are introduced to the surface of the nano-material through high-temperature calcination, and the molybdenum disulfide nano-material rich in sulfur defects is prepared; the molybdenum disulfide nano material rich in sulfur defects is in the shape of nano flower balls with the diameter of 200-300 nm, has the optimal photothermal conversion efficiency and high adsorbability under near-infrared light irradiation, and can efficiently inhibit the activity of escherichia coli and bacillus subtilis; the preparation method disclosed by the invention is simple in process, stable in reaction system, wide in reactant source and environment-friendly, shows a universal sterilization effect, is expected to introduce a new method in the field of sterilization of nano materials, provides a new technology and a new idea for design and preparation of functional nano materials, and has very good practicability.

The application provides a TOPCon cell and a preparation method thereof and a photovoltaic system, and relates to the field of solar cells. The TOPCon cell comprises a P-type silicon-based substrate and an N+ layer. The surface of the P-type silicon-based substrate extends in a direction away from the P-type silicon-based substrate and comprises, in sequence from the P-type silicon-based substrate, an N+ emitter layer, a silicon oxide layer, a first aluminum oxide layer, and a second aluminum oxide layer. The first aluminum oxide layer comprises a boron-doped aluminum oxide layer, and the second aluminum oxide layer comprises a phosphorus-doped aluminum oxide layer. The TOPCon cell adopts a double-layer gradient-doped aluminum oxide structure. The first aluminum oxide layer close to the P-type silicon-based substrate is a nanocrystalline aluminum oxide doped with boron, the B-O bond is used to enhance the interface chemical passivation, and the density of silicon dangling bonds is reduced. The second aluminum oxide layer close to the N+ emitter layer is an amorphous aluminum oxide doped with phosphorus. The phosphorus doping concentration gradient decreases, the electric field distribution can be controlled by P doping, and the hole recombination is inhibited.

The invention discloses a Co3O4-Cu2-xS composite photo-thermal catalyst as well as a preparation method and application thereof. The composite photo-thermal catalyst is prepared by taking a surfactant as a bridge and compounding Co3O4 and Cu2-xS. The composite photo-thermal catalyst has a reduced band gap width, can effectively promote migration and separation of photon-generated carriers, enhances the absorption efficiency of visible light-near infrared light, and shows excellent photo-thermal conversion performance. The composite photo-thermal catalyst can be used for constructing a Co3O4-Cu2-xS + PMS + NIR catalytic system, and peroxymonosulfate is activated under the irradiation of near-infrared light so as to degrade antibiotics in water. Experiments prove that the Co3O4-Cu2-xS + PMS + NIR system disclosed by the invention can achieve the degradation rate of 99% on levofloxacin within 20 minutes, and the generation efficiency of active species is remarkably improved through the synergistic effect of a photothermal effect and interface activation. The catalyst has broad-spectrum degradation activity on various antibiotics, keeps efficient and stable catalytic performance in a wide pH range, and shows excellent ion interference resistance and adaptability to various water bodies.

The application discloses a kind of medical titanium alloy material surface antibacterial functionalization processing methods, first by hydrothermal oxidation and high-temperature sintering processing in titanium alloy material surface construction TiO2 Nanometer sheet, then deposit W 18 O 49 Quantum dots are deposited on the TiO2 Nanometer sheet, and TiO2 / W 18 O 49 Heterojunction is constructed on the surface of titanium alloy.TiO2 / W 18 O 49 Heterojunction can efficiently catalyze the production of reactive oxygen species (ROS) under near-infrared light irradiation, achieving antibacterial function. The TiO2 / W 18 O 49 Heterojunction functionalized titanium alloy material surface, the irregular sheet structure of TiO2 Nanometer sheet can greatly increase the contact area of the material surface and the surrounding solution, and the W 18 O 49 Quantum dots have the characteristics of "single-atom-like catalysis", which can improve the ROS yield and further endow the medical titanium alloy surface with strong photodynamic antibacterial performance.

The invention relates to the field of organic photoelectric materials, in particular to an organic compound, a mixture and an organic photovoltaic device. The invention provides an organic compound as shown in a general formula (I), the compound has a large conjugate plane, and is beneficial to delocalization of electrons and improvement of the glass transition temperature; meanwhile, close packing like linear molecules is inhibited by the three-dimensional structure, so that excessive crystallization is inhibited; finally, the structure of three electron-withdrawing end groups of the organic compound provided by the invention provides a multi-dimensional electron transport channel, improves the electron mobility and inhibits recombination. Therefore, when the compound is used as an acceptor material to be applied to an organic photovoltaic device, excellent photoelectric conversion efficiency is shown.

The application provides a porous carbon nitride photocatalyst and a preparation method and application thereof, and the porous carbon nitride photocatalyst is prepared by the following steps: uniformly mixing and grinding a nitrogen-rich organic material precursor and a gaseous template agent ammonium chloride; performing high-temperature treatment on the mixed precursor by using a microwave-assisted thermal polymerization method, and cooling to room temperature after the reaction is completed; and grinding, washing and drying the obtained product to collect the GCN. The method uses a one-step microwave-assisted thermal polymerization method to make melamine and the mixed precursor of ammonium chloride react, and the rapid thermal shock effect of the microwave field is used to induce the material to form a porous structure; the ammonium chloride is decomposed at high temperature to generate a bubble effect, which effectively inhibits the excessive stacking of carbon-nitrogen planes, induces the formation of a hierarchical porous structure and introduces rich edge defects. The degradation rate constant of the catalyst for cephalosporin antibiotics can reach 4.16 times that of pure g-C3N4, the catalyst has extremely excellent specific removal capacity for tetracycline, has good chemical stability and broad applicability, and can efficiently realize the deep purification of pollutants in water.

The invention discloses a magnesium phosphate bone cement / nano enzyme composite material. The magnesium phosphate bone cement / nano enzyme composite material is prepared from CaHPO4, NaH2PO4, MgO powder, hydroxyapatite and oxygen vacancy cerium oxide. The invention also discloses an application of the magnesium phosphate bone cement / nano-enzyme composite material in preparation of a bone repair scaffold. The oxygen vacancy cerium oxide is prepared, through oxygen vacancy defects, electron-hole recombination is inhibited, separation of the oxygen vacancy cerium oxide is promoted, and the sonodynamic performance of the oxygen vacancy cerium oxide is enhanced. In addition, magnesium phosphate bone cement and oxygen vacancy cerium oxide are prepared into a composite material, and the bone cement is endowed with sonodynamic performance and nano-enzyme activity, so that the bone cement has an antibacterial function, promotes cell proliferation and realizes bone repair.

The invention discloses a sulfur-vacancy-rich ZnIn2S4 and AgBiS2 heterojunction photocatalytic composite material as well as a preparation method and application thereof. The composite material is an S-type heterojunction composite material formed by growing a ZnIn2S4 nanosheet containing sulfur vacancy on a sea urchin-shaped AgBiS2 semiconductor material. The preparation method comprises the following steps: mixing silver nitrate, bismuth nitrate pentahydrate, thiourea and ammonium acetate serving as raw materials, and reacting the obtained mixed solution at 150-200 DEG C for 4-7 hours to obtain sea urchin-shaped AgBiS2 powder; and growing a ZnIn2S4 nanosheet on the sea urchin-shaped AgBiS2 powder in situ, so as to obtain the ZnIn2S4-coated AgBiS2 heterojunction photocatalytic composite material rich in sulfur vacancy. The broccoli-shaped sulfur-rich vacancy ZnIn2S4 (at) AgBiS2 heterojunction photocatalyst disclosed by the invention shows enhanced hydrogen production, tetracycline hydrochloride and rhodamine B degradation performance and excellent photocatalytic stability.

The invention is suitable for the technical field of perovskite solar cells, and provides an anti-solvent-resistant trans-perovskite solar cell and a preparation method thereof. The green anti-solvent dimethyl carbonate is used for replacing the traditional high-toxicity chlorobenzene anti-solvent, so that the problem of environmental pollution in the preparation process of the perovskite solar cell is solved. The prepared perovskite thin film is larger in grain size, higher in crystallization quality, fewer in defect and higher in flatness and density, most leakage current loss is reduced, energy loss caused by non-radiative recombination is restrained, and the current density of the perovskite solar cell is greatly improved. According to the perovskite solar cell, the carrier transmission problem is improved, carrier recombination between perovskite and the electron transmission layer is inhibited, and therefore the open-circuit voltage, the filling factor, the power conversion efficiency, the stability and the like of the perovskite solar cell are greatly improved.

The invention discloses a preparation method of a perovskite single crystal film, and relates to the technical field of perovskite. The invention relates to a preparation method of a perovskite single crystal thin film, which comprises the following steps of: (1) spin-coating an ITO (Indium Tin Oxide) substrate with an Meo-2PACz molecular solution dissolved in an organic solvent 1, and annealing at 95-100 DEG C for 10-12 minutes to obtain a multi-layer Meo-2PACz small molecular thin film; and (2) spin-coating a PTAA solution dissolved in an organic solvent 2 on the multi-layer Meo-2PACz micromolecular film, and annealing at 95-100 DEG C for 10-12 minutes. According to the preparation method, the growth substrate of the single crystal is modified, and the prepared ITO / SAM / PTAA-SAM substrate has the advantages of optimizing the energy level, passivating interface defects, promoting carrier transport, providing perovskite nucleation sites and the like.

The invention discloses a preparation method of a mesoscopic perovskite solar cell and the mesoscopic perovskite solar cell, and belongs to the technical field of mesoscopic perovskite solar cells. The passivation layers are prepared on the surface of the mesoporous spacer layer and the surface of the pore inner wall of the mesoscopic perovskite solar cell, oxygen vacancies on the surface of the mesoporous spacer layer can be effectively reduced, recombination of carriers is reduced, direct contact between the mesoporous spacer layer and a mesoporous membrane layer below the mesoporous spacer layer and a perovskite active layer is prevented, and the performance of the solar cell is improved. The interface of the perovskite crystal is passivated, carrier recombination at the interface of the mesoporous spacing layer and the perovskite active layer and at the interface of the perovskite active layer and the back electrode is inhibited, the carrier transmission life is prolonged, and the cell efficiency is improved.

This invention provides a fluorine-doped ZnIn2S4 photocatalyst, its preparation method, and its application. The fluorine-doped ZnIn2S4 photocatalyst has a spherical nanoflower structure, which is composed of nanosheets arranged in an array. The preparation method includes the following steps: (1) adding ZnCl2, InCl3·4H2O, and thioacetamide to water and stirring to obtain a mixture A; (2) adding a fluorine source to mixture A and mixing thoroughly to obtain mixture B; (3) subjecting mixture B to a hydrothermal reaction, separating the product after the reaction, washing, and drying to obtain the F-ZnIn2S4 photocatalyst. The fluorine-doped ZnIn2S4 photocatalyst exhibits highly efficient photocatalytic activity.

The present application provides a GaN-based α-particle detector and a preparation method thereof, including a substrate and an epitaxial structure formed on the substrate by epitaxy, wherein the epitaxial structure includes a multi-quantum well layer. By introducing the multi-quantum well layer, the multi-quantum well layer absorbs the incident energy of the α-particle and correspondingly excites a large number of electron-hole pairs, and the electron-hole pairs are confined in the quantum wells by the quantum confinement effect of the multi-quantum well layer, which not only reduces the loss of electron-hole pair diffusion and recombination, but also prolongs the life of carriers, greatly improves the collection efficiency of the α-particle detector for carriers, ensures that more electron-hole pairs can be collected and converted into electrical signal output, thereby improving the performance of the α-particle detector.

This invention relates to the field of nanoscale full-spectrum photocatalytic materials, and particularly to a method for preparing a molybdenum selenide / oxygen-deficient bismuth oxybromine@gold three-phase Z-type heterojunction photocatalyst. This method solves the problems of low photogenerated electron-hole separation efficiency, narrow full-spectrum response range, and poor stability in existing bismuth-based photocatalysts. The preparation method involves first preparing oxygen-deficient BiOBr nanospheres via a solvothermal method, then directly reacting tetrachloroauric acid with oleylamine in toluene to prepare small-particle-size monodisperse Au nanoparticles, which are then combined with oxygen-deficient BiOBr to prepare a BiOBr@Au nanosphere core-shell structure. Finally, a MoSe2 / oxygen-deficient BiOBr@Au three-phase composite material is prepared via a hydrothermal reaction. The catalyst of this invention exhibits absorption capacity under the full spectrum of light, and simultaneously achieves a synergistic enhancement of carrier separation efficiency and strong redox capability, demonstrating excellent photocatalytic activity and the ability to efficiently degrade pollutants and produce hydrogen.

The application discloses a kind of perovskite laminated solar cell and preparation method thereof, photovoltaic module and photovoltaic device, belong to solar cell technical field.The perovskite laminated solar cell from light-receiving front to light-receiving back successively includes substrate, bottom electrode, first hole transport layer, wide band gap perovskite layer, first electron transport layer, barrier layer, intermediate interconnection layer, narrow band gap perovskite layer, second electron transport layer, hole blocking layer, top electrode;The intermediate interconnection layer includes first sublayer, self-assembled monolayer and second sublayer, first sublayer faces first electron transport layer, second sublayer faces narrow band gap perovskite layer, and self-assembled monolayer is located between first sublayer and second sublayer.The application can inhibit interface scattering and reduce wide-angle reflection loss under oblique incidence, while maintaining excellent electrical transmission to promote carrier transfer and recombination, significantly improve the overall photovoltaic performance of device.

The invention discloses a preparation process of an ivermectin waste liquid liquid fertilizer, and relates to the technical field of liquid fertilizers. When the ivermectin waste liquid liquid fertilizer is prepared, nitric acid, urea and tetrabutyl titanate react to prepare nano titanium dioxide; performing ultrasonic treatment on nano titanium dioxide and lanthanum nitrate to obtain a waste liquid treatment agent; the preparation method comprises the following steps: reacting cellulose with pentenedioic acid and N, N-methylene bisacrylamide to prepare modified cellulose; treating the ivermectin waste liquid by using a flocculating agent to obtain pretreated ivermectin waste liquid, treating the pretreated ivermectin waste liquid by using a waste liquid treating agent, and adding the modified cellulose to obtain the ivermectin waste liquid liquid fertilizer. The ivermectin waste liquid liquid fertilizer disclosed by the invention has good water retention and slow release effects and has a good degradation rate.

This invention discloses a parallel-interface engineered viologen-based defective carbon nitride composite material, its preparation method, and its applications, belonging to the field of energy catalysis and photochemical materials technology. The material comprises: a defective graphitic carbon nitride support; single-atom platinum catalytic sites supported on the support; and a selenium-containing viologen compound anchored by covalent bonds in a configuration parallel to the support surface. Through a bilateral covalent bonding strategy, viologen molecules are stably anchored in a parallel configuration to the single-atom platinum-modified defective carbon nitride surface, constructing a highly efficient and stable "electron bridge" structure, significantly enhancing interfacial bonding and photogenerated electron transport efficiency. This composite material exhibits excellent photocatalytic hydrogen evolution activity and efficient coupling ability with benzylamine oxidation under visible light, and its activity retention rate reaches over 92% after 144 hours of cycling. It provides a new paradigm for solving the problem of poor interfacial stability in photocatalysts and has significant application prospects in the field of solar fuel synthesis.

The present invention relates to the technical field of water treatment, and specifically to a method for photocatalytic treatment of industrial oily wastewater. After a double core-shell structure photocatalyst is added to the industrial oily wastewater, light is continuously provided for photocatalytic treatment. The double core-shell structure photocatalyst has a bimetallic sulfide as a core, titanium dioxide as an intermediate shell layer, and a perovskite-type oxide as an outer shell layer. The photocatalytic treatment method provided by the present invention has an excellent treatment effect on industrial oily wastewater and can be widely promoted and applied.

This invention discloses a method for preparing a TNTs / NiO@CoPi array electrode (TNCP) for photoelectrocatalytic water splitting, belonging to the field of photoelectrocatalytic new energy materials technology. The invention first prepares a highly ordered anatase TiO2 nanotube array (TNTs) using secondary anodic oxidation, then loads Ni nanoparticles onto the surface and inside the nanotubes via constant current electrodeposition, followed by high-temperature calcination to generate p-type NiO, constructing a TNTs / NiO p-n heterojunction (TN). Finally, it uses AM 1.5 simulated sunlight to selectively deposit an amorphous CoPi cocatalyst, where the CoPi only coats the NiO nanospheres without blocking the TiO2 mass transfer channels. This invention utilizes the p-n heterojunction to broaden the full-spectrum light absorption from 250 to 800 nm, and CoPi acts as a hole-trapping layer to suppress electron-hole recombination, significantly reducing interfacial charge transport impedance; the steady-state photocurrent of the TNCP deposition sample reaches 0.06 mA·cm⁻. 2 It is three times that of pure TNTs. This process involves no precious metals or highly toxic corrosive solvents, and the reaction conditions are mild. The electrodes produced can be used for photoelectric water splitting to produce hydrogen, photoelectric oxidation of organic pollutants, and ethylene glycol photoelectric fuel cells. They exhibit excellent cycle stability and have promising prospects for large-scale industrial applications.

The invention relates to a tunneling passivation structure. The tunneling passivation structure comprises a MnTiO3 layer, a first doped poly layer, a silicon oxynitride layer and a second doped poly layer which are sequentially arranged on the backlight surface of a silicon substrate. The tunneling passivation structure provided by the invention comprises a MnTiO3 layer, a first doped poly layer, a silicon oxynitride layer and a second doped poly layer which are arranged in sequence, on one hand, the thickness of MnTiO3 and the thickness of silicon oxynitride correspond to the change of a band gap, and the change is much smaller than that of silicon dioxide; on the other hand, MnTiO3 serves as a bottom tunneling layer field and is prepared only through a process, thickness control is not affected by other factors of the environment and is more accurate, silicon oxynitride field is prepared only through the process, thickness control is not affected by other factors of the environment and is more accurate; meanwhile, due to the laminated design of the tunneling passivation structure, the propulsion rate of phosphorus is inhibited to a certain extent, and serious compounding caused by excessive propulsion of doping atoms on the silicon substrate is avoided.

The invention discloses a preparation method of a catalyst for producing hydrogen peroxide through oxygen deficiency tandem piezoelectric-mechanical redox, and the preparation process of the catalyst comprises the following steps: firstly, constructing a zinc oxide substrate with a litchi-shaped structure through a water-phase thermally-induced self-assembly reaction; then introducing oxygen defects with controllable content on the surface of zinc oxide by adopting a liquid-phase mediated chemical reduction mode; and finally, performing in-situ auto-polymerization on the surface of the defective zinc oxide to form a polydopamine coating, thereby obtaining the target catalyst. The catalyst can efficiently and highly selectively prepare hydrogen peroxide through ultrasonic excitation under the conditions of pure water and normal temperature, has the advantages of mild reaction conditions, high generation rate, good stability, environmental protection and the like, and is suitable for the application scene of distributed hydrogen peroxide in-situ preparation.