135 results about "Tio2 nanotube" patented technology

The invention discloses a near-infrared light response titanium-based implant as well as a preparation method and application thereof, and belongs to the technical field of medical materials. The near-infrared light response titanium-based implant provided by the invention comprises a porous titanium substrate, the TiO2 nanotube array is formed on the surface of the porous titanium substrate; the first photo-thermal coating layer is formed on the TiO2 nanotube array; the second photo-thermal coating is formed on the first photo-thermal coating; wherein the first photo-thermal coating is a ZIF-8 coating; and the second photo-thermal coating is a carbon nanotube coating. Through the double-layer photo-thermal system design of the ZIF-8 coating, the photo-thermal conversion efficiency is greatly improved, the controllable photo-thermal response capacity, the long-acting antibacterial and anti-tumor capacity and the dynamic osseointegration capacity are achieved, and the excellent osteosarcoma treatment effect is achieved.

The invention relates to a bimetallic porphyrin / GO / TiO2 nanotube composite photocatalytic material and application thereof. The bimetallic porphyrin / GO / TiO2 nanotube composite photocatalytic material is prepared by the following preparation method: preparing Ni-CoTCPP; the preparation method comprises the following steps: preparing a bimetallic porphyrin solution, immersing TiO2NTs into the porphyrin solution, stirring, taking out a titanium foil, and drying at room temperature to prepare Ni-CoTCPP / TiO2NTs; and soaking the Ni-CoTCPP / TiO2NTs into the suspension of GO, stirring, taking out the titanium foil, and drying at room temperature to obtain the Ni-CoTCPP / GO / TiO2NTs. The bimetallic porphyrin / GO / TiO2NTs ternary composite material is constructed through the action of porphyrin in photosynthesis, various targets in the field of photocatalytic CO2 reduction are achieved, and selectivity of products can be controlled while photocatalytic activity is improved.

The invention discloses a carbon-doped titanium dioxide nanotube-molybdenum disulfide energy-storage antibacterial material and a preparation method thereof. The preparation method comprises the following steps: carrying out primary anodic oxidation on a clean titanium foil in a mixed electrolyte of ethylene glycol, water and ammonium fluoride; after ultrasonic treatment is carried out in a hydrochloric acid solution for set time, secondary anodic oxidation is carried out, and the mixed electrolyte of the secondary anodic oxidation is the same as that of the primary anodic oxidation; annealing the titanium foil subjected to anodic oxidation twice in an argon atmosphere, putting an annealed sample into a mixed solution of sodium molybdate, a sulfur source and glucose, and carrying out hydrothermal treatment; and the titanium foil subjected to hydro-thermal treatment is cleaned and dried, and the carbon-doped titanium dioxide titanium foil with the surface covered with molybdenum disulfide is obtained. The MoS2-coated carbon-doped titanium dioxide nanotube (TNT-C-atMoS2) with high biocompatibility developed by the invention has a synergistic effect of charge antibiosis and chemical sterilization, so that the problem of intractable biological fouling of a titanium-based metal material in ocean engineering equipment is effectively solved.

The invention discloses a photo-thermal-electric coupling titanium-based implant as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The photo-thermal-electric coupling titanium-based implant provided by the invention comprises a porous titanium substrate and a hydrogel layer, the surface of the porous titanium substrate is of a TiO2 nanotube array structure; up-conversion nanoparticles and g-C3N4 nanoparticles are arranged between the porous titanium substrate and the hydrogel layer, and the up-conversion nanoparticles are NaYF4 up-conversion nanoparticles co-doped with Yb < 3 + > and Er < 3 + >; carbon nanotubes and medicinal active ingredients are loaded in the hydrogel layer. According to the titanium-based implant, collaborative coupling in light-heat-electricity multi-energy forms is achieved, the titanium-based implant is endowed with the integrated function of light response, heat conversion, electric signal conduction and local treatment, and an integrated solution with structural supporting, biological activity regulation and treatment effects is provided for bone tissue defect repair.

The present invention provides a method for preparing a magnesium-based hydrogen storage material and a magnesium-based hydrogen storage material. The method comprises the following steps: introducing hydroxyl groups onto the surface of TiO2 using a hydrothermal method to obtain TiO2 nanotubes, grafting aminopropylsiloxane onto the TiO2 surface to obtain modified TiO2 nanotubes; introducing reduced graphene oxide into the modified TiO2 nanotubes to obtain a graphene@TiO2 nanocomposite catalyst; and introducing the graphene@TiO2 nanocomposite catalyst into nanomagnesium particles using a dry method and a wet ball milling method using cyclohexane as a solvent to obtain a magnesium-based hydrogen storage material. This method can produce a magnesium-based hydrogen storage material with a high hydrogen storage capacity.

The invention relates to the technical field of electrocatalytic oxidation, in particular to a graphene-doped spherical PbO2 anode and a preparation method and application thereof.According to the graphene-doped spherical PbO2 anode, a reduced TiO2 nanotube array serves as a middle layer, and the graphene-doped spherical PbO2 electrode is prepared in situ through a hydrothermal method. The reduced TiO2 intermediate layer provided by the invention is of a uniformly arranged porous nanotube array structure, the introduction of graphene can reduce the aggregation of PbO2 particles, the coverage degree of the active layer is relatively good, and the direct contact between an electrolyte and the intermediate layer is prevented, so that the service life of a PbO2 electrode is prolonged. The graphene-doped spherical PbO2 electrode provided by the invention not only can be used for electrocatalytic oxidation of As (III) into As (V), but also can be used for degrading cephalosporin antibiotics and reducing the toxicity of pollutants.

The invention discloses a manufacturing method of a hierarchical porous structure cell self-adaptive growth type bone repair scaffold. The manufacturing method comprises the following steps: S1, preparing an SLM porous titanium scaffold with through macropores through a selective laser melting technology; s2, performing anodic oxidation on the surface of the SLM porous titanium to prepare a TiO2 nanotube; and S3, preparing the SLM porous titanium-mineralized collagen graded porous structure. The macroscopic through macropores are firstly constructed by combining a metal 3D printing technology, and the through macropores are beneficial to tissue oxygen supply, nutrition supply level waste metabolism and angiogenesis; and then, carrying out surface hydrophilic treatment on the three-dimensional surface of the 3D printed porous titanium scaffold, and constructing a collagen fiber micron-sized network structure on the hydrophilic surface in macroscopic macropores by utilizing a freeze-drying technology, so as to finally obtain the bone-imitating scaffold material in structure, composition and space.

The invention relates to the field of waste treatment, in particular to a titanium dioxide nanotube as well as a preparation method and application thereof. The nanotube is in an anatase crystal form, the tube diameter is 10 nm to 10 [mu] m, the specific surface area is 39.81-151.77 cm < 2 > / g, and the titanium dioxide nanotube has a mesoporous and microporous structure. The catalyst can be used as a catalyst for photo-thermal synergistic catalytic degradation of a refrigerant, has high reaction activity in photo-thermal synergistic catalytic degradation of the refrigerant, and realizes effective degradation with low temperature, low energy consumption, large flow, high speed and high refrigerant component proportion.

The invention discloses an anti-inflammatory osteogenesis-promoting titanium-based implant which comprises a titanium base material, a TiO2 nanotube array layer is constructed on the surface of the titanium substrate in situ; iL-4 is loaded in the TiO2 nanotube array layer, and the surface of the TiO2 nanotube array layer is grafted with a gate molecule mPEG2000-PLGLAL-(PEG4)-C. The invention further discloses a preparation method of the TiO2 nanotube array. The anti-inflammatory osteogenesis-promoting titanium-based implant can respond to MMP concentration change of a surrounding microenvironment so as to regulate and control the release rate of IL-4, in the early stage of bone healing, IL-4 is slowly released, M1 macrophages are dominant, a short and moderate inflammatory reaction is kept, along with response to MMP in the microenvironment, IL-4 is rapidly released, M1 polarization is inhibited, and the osteogenesis-promoting titanium-based implant has the advantages of being good in anti-inflammatory effect and capable of promoting osteogenesis. And inflammation is eliminated in time, M2 polarization is promoted, wound repair is accelerated, osseointegration is further promoted, dynamic regulation of immune response is realized, and a new strategy is provided for promoting bone tissue regeneration through immune regulation.

The invention belongs to the field of photoelectrochemical cathode protection, and particularly relates to a ZnAl-LDH / TiO2 compound photo-anode material (ZnAl layered double hydroxide modified titanium dioxide nanotube array compound photo-anode (ZnAl-LDH / TiO2)) as well as a preparation method and an application of the ZnAl-LDH / TiO2 compound photo-anode material. The preparation method comprises the following steps: constructing a TiO2 nanotube array through an anodic oxidation method, and then growing nanoflower-shaped ZnAl-LDH on the surface of the TiO2 nanotube array through a hydrothermal method to obtain the ZnAl-LDH / TiO2 composite photo-anode material. The narrow-band-gap ZnAl-LDH improves the absorption capacity of the compound photo-anode on visible light, and improves the utilization rate of sunlight; the ZnAl-LDH and the TiO2NTAs are matched in energy band, so that an II-type heterojunction is formed, and the separation efficiency of photon-generated carriers is improved; the stability of the material is effectively improved, so that the material can provide cathode protection for 304SS for 12 hours in 3.5 wt% NaCl solution without a hole trapping agent. The method has the advantages of simple synthesis method and high photoelectric conversion efficiency.

A catalyst for the direct synthesis of acetic acid and ethanol from CO2 via a non-hydrogenation route, its preparation method, and its application are disclosed. This invention belongs to the field of catalyst technology and overcomes the shortcomings of existing acetic acid synthesis technologies. The solution involves using TiO2 nanotubes as the catalyst support, and the active component being a single metal Co or Pd, or a bimetallic composition of Co and Pd, with a loading of 3-7%. wt The catalyst is prepared by first using a hydrothermal method to prepare TiO2 nanotubes, and then using the TiO2 nanotubes as a carrier, impregnating, drying, and calcining to obtain the catalyst. When applied to a dual-channel fixed-bed step-by-step continuous reactor, the catalyst enables the one-step conversion of CO2 to ethanol and acetic acid via a non-hydrogenation route at low temperature and atmospheric pressure, avoiding the problem of insufficient hydrogen source in the CO2 hydrogenation route. The process of this invention is short, the conditions are mild, it does not require a high-energy-consuming syngas production step, the product composition is simple, and the subsequent separation energy consumption is low.

This invention discloses a method for preparing a polyaniline-titanium dioxide nanotube array composite electrode, comprising the following steps: (1) anodizing a titanium sheet to obtain a titanium dioxide nanotube array; (2) preparing a polyaniline solution through a polymerization reaction; (3) loading the polyaniline solution onto the surface of the titanium dioxide nanotube array through dip-coating, and drying to obtain the polyaniline-titanium dioxide nanotube array composite electrode. The preparation method of this invention can form nanotube clusters, strengthening the bonding force between the nanotubes and the substrate, and the formed nanotubes are more regular; moreover, the prepared nanotube array composite electrode can significantly improve the electrochemical and mechanical stability of polyaniline, thereby obtaining a larger capacitance and long-term charge-discharge cycle stability, and can also improve the conductivity of the TiO2 nanotube array.

This invention discloses a Sn3O4-Ag-Ag2O photoelectric material based on TiO2 nanotubes and its preparation method, belonging to the field of photoelectric materials technology. The invention uses a hydrothermal Sn3O4-Ag-Ag2O nanoparticle method on a TiO2 nanotube array to construct an indirect Z-type heterojunction. The material exhibits high photocatalytic activity in dye degradation and water decomposition to produce hydrogen. The prepared sample showed strong photocatalytic ability and stability in organic dye degradation and Cr(VI) removal, with a visible light-driven photocatalytic hydrogen production rate of 55.79 μmol·cm ‑2 ·h ‑1 Photoelectrocatalytic data and electron spin resonance (ESR) signal results indicate that the composite photoelectrode forms an indirect Z-type electron transfer pathway, providing guidance for the preparation of composite photoelectrode materials with high optical and photocatalytic properties. The Z-type heterojunction structure will show broad application prospects in the design and application of photocatalysts.

The invention discloses a method and a system for degrading RDX wastewater by using a microbial fuel cell, which are characterized in that three MFC devices (classical double-chamber, external photocatalysis combination and photo-anode MFC) are constructed, and TiO2 nanotube photocatalysis material preparation, gradient microbial acclimation and process optimization are combined, so that RDX efficient degradation and electric energy recovery are realized. The RDX molecular structure is destroyed through photocatalysis, and the toxicity is reduced; intermediate products are thoroughly mineralized through microbial metabolism; and the flora adaptability is enhanced by gradient domestication. The embodiment shows that the photo-anode MFC shortens the complete degradation time of the RDX to 7 days, and the electricity generation stability is remarkably improved. The method has high efficiency, economical efficiency and environmental friendliness, and is suitable for energy-containing wastewater treatment and resource utilization.

The application relates to the technical field of coating preparation, in particular to a nano coating for a self-cleaning polycrystalline solar module and a preparation method, wherein the coating is composed of titanium dioxide nanotubes, fluorosilane modified silica aerogel, graphene quantum dots and polyaniline-polyazole copolymer; the titanium dioxide nanotubes are prepared through a hydrothermal reaction and calcination, the aerogel is synthesized through a sol-gel method, the quantum dots are obtained through pyrolysis reduction, and the conductive polymer is obtained through oxidation polymerization; the components are dispersed in a solvent in proportion, ultrasonic dispersion is carried out after the addition of a leveling agent, the solar module is coated through a dip coating method, and the coating is formed through drying and ultraviolet curing. The self-cleaning nano coating is composed of multiple components, forms a multistage rough structure, realizes superhydrophobicity, widens a light response range, improves photocatalytic efficiency, improves electrical performance and increases photoelectric conversion efficiency.

The invention discloses an amino-functionalized titanium-based nanopore material and a preparation method thereof, and belongs to the technical field of waste gas treatment.The preparation method comprises the steps that a titanium sheet is subjected to anodic oxidation twice to generate a chromium-doped titanium dioxide nanotube, and then amino-functionalized titanium MOF grows on the surface of the nanotube in situ through a solvothermal reaction; the preparation method comprises the following steps: firstly, preparing amino-functionalized titanium-based composite powder, synthesizing silicon dioxide nanospheres through a sol-gel method, carrying out surface fluorination on perfluorodecyltrimethoxysilane to obtain a super-hydrophobic layer, modifying the amino-functionalized titanium-based composite powder through a silane coupling agent KH550, and finally, loading the fluorinated silicon dioxide nanospheres on the surfaces of the composite microspheres through electrostatic adsorption to obtain the super-hydrophobic coating. The amino-functionalized titanium-based nanopore material is obtained; the high adsorption capacity, wide-spectrum adsorption selectivity, good photocatalytic performance and good stability of the nanopore material are realized.

The invention discloses an ordered membrane electrode anode catalyst layer and a preparation method and application thereof, the preparation method comprises the following steps: 1) preparing a titanium oxide nanotube array on a substrate, and calcining to obtain a crystal phase titanium oxide nanotube array; (2) carrying out hydrothermal reaction on the substrate with the crystal phase titanium oxide nanotube array to obtain a tungsten-doped titanium oxide nanotube array; (3) calcining the tungsten-doped titanium oxide nanotube array to obtain a tungsten-doped titanium oxynitride nanotube array; 4) obtaining a tungsten-doped titanium oxynitride-polyaniline composite nanotube array carrier on the tungsten-doped titanium oxynitride nanotube array by an electrochemical deposition method; and 5) preparing a noble metal thin layer on the tungsten-doped titanium oxynitride-polyaniline composite nanotube array carrier through an electrochemical deposition method to form a noble metal coating layer. According to the invention, the composite ordered nanotube array catalyst layer and the membrane electrode with the membrane structure containing the catalyst layer are obtained.

The invention provides a modified titanium dioxide nanotube and a preparation method thereof, a water electrolysis catalytic electrode and a preparation method thereof, and a water electrolysis hydrogen production device. The preparation method of the modified titanium dioxide nanotube comprises the following steps: S1, mixing titanium dioxide nanoparticles with a first alkali solution to obtain a titanium dioxide nanoparticle dispersion liquid, heating the titanium dioxide nanoparticle dispersion liquid for reaction, washing a reaction product with acid, ethanol and water, and performing high-temperature annealing to obtain a TiO2 nanotube; and S2, aluminum powder and the TiO2 nanotube are placed on the upstream and downstream of gas of a tubular furnace correspondingly, modified annealing treatment is conducted, and the modified titanium dioxide nanotube is obtained. The catalytic activity of the titanium dioxide nanotube is obviously improved, the conductivity of the titanium dioxide nanotube is obviously improved while the stability of the material is guaranteed, the titanium dioxide nanotube is applied to a catalytic electrode, the electrode can have good chemical stability, corrosion resistance and conductivity, and the overall performance of the catalytic electrode is obviously improved.

The invention discloses a preparation method of an interstitial TiC nanotube coating on the surface of a titanium fibrofelt. The method comprises the following steps: 1, preparing a TiO2 nanotube array coating on the surface of the titanium fibrofelt by adopting an anodic oxidation method; secondly, impurities in the molten salt are removed through pre-electrolysis and pre-soaking of TiO2, and purified molten salt is obtained; and thirdly, purified fused salt is adopted, the TiO2 nanotube array coating on the surface of the titanium fiber felt is converted into a TiC nanotube coating through a fused salt electrolysis method, and the titanium fiber felt surface gap type TiC nanotube coating is obtained. According to the method, an anodic oxidation method and a fused salt electrolysis method are combined, so that the gap type TiC nanotube coating is directly and tightly connected to the surfaces of titanium fibers in the titanium fiber felt, and the gap type TiC nanotube coating and the titanium fiber felt with micron pores form a unique micro-nano composite structure; the preparation of the gap type TiC nanotube with high specific surface area, no adhesive and excellent conductivity on the surface of the titanium fibrofelt is realized under a low-temperature condition, and the preparation method has good application potential in the aspect of conductive support materials.

The present invention relates to an implant having a nanopatterned shallow concave surface and a method for manufacturing the same, the method comprising: a step for forming titanium oxide nanotubes by anodizing an implant body made of titanium metal or a titanium alloy; and a step in which the titanium oxide nanotube is removed, thereby forming a shallow recess on the surface of the implant main body. Thus, the surface of the implant main body is anodized and then the anodized surface is removed to form a shallow recess on the surface of the implant main body, the anodized titanium oxide film is peeled off to prevent the titanium oxide film from falling into a living body, and impurities remaining on the surface can be effectively removed. Further, it is possible to maximize the surface area when transplanted into the inside of a living body by means of the use of titanium or a titanium alloy as a raw material for the implant main body and the dimples formed by surface anodic oxidation, thereby providing excellent biocompatibility, chemical stability, and mechanical stability.

The invention provides a heterojunction nano composite material and a preparation method and application thereof, the heterojunction nano composite material comprises C3N4 / MoS2 / titanium dioxide nanotube heterojunction nano particles, and the C3N4 / MoS2 / titanium dioxide nanotube heterojunction nano particles are MoS2 / titanium dioxide mixed bodies of which the surface layers are coated with layered C3N4; wherein in the MoS2 / titanium dioxide mixed body, the titanium dioxide nanotubes grow in a highly oriented manner; the MoS2 nanosheets are in a petal sheet shape and are uniformly distributed on the surfaces of the titanium dioxide nanotubes. The material is stable in structure and high in organic pollutant removal efficiency; the preparation method is safe and simple, mild in reaction and low in toxicity, has the advantages of environmental friendliness, safety and controllability, is easy for large-scale production, and brings great innovation to future new energy development and environmental governance; the method is suitable for large-area popularization and application.

The application relates to a preparation method of a gradient titanium-based boron-doped diamond thin film electrode and belongs to the technical field of electrode materials. Ti / TiO2 nanotube gradient substrates are obtained by in-situ preparation of TiO2 nanotubes through anodic oxidation of a metal titanium substrate; the Ti / TiO2 nanotube gradient substrates are embedded into carbon powder, high-temperature carbonization treatment is carried out under a protective atmosphere to obtain Ti / TiC nanotube gradient substrates; a boron-doped diamond thin film is deposited onto the surface of the Ti / TiC nanotube gradient substrates by using a chemical vapor deposition method to obtain the gradient titanium-based boron-doped diamond thin film electrode. The TiC nanotubes are synthesized on the titanium substrate in-situ and in advance, the generation of uneven TiC and TiH2 phases in the conventional chemical vapor deposition process can be avoided, an embedded structure is formed between the TiC phase gradient layer and diamond particles, the poor bonding force problem caused by the thermal expansion coefficients and lattice mismatches of various phases is reduced, and the service life of the titanium-based boron-doped diamond thin film electrode is significantly improved.

The invention belongs to the technical field of marine corrosion prevention, and particularly relates to a titanium dioxide nanotube array and a preparation method and application thereof. The preparation method comprises the following steps: cleaning and drying a titanium sheet in sequence; the dried titanium sheet is subjected to primary anodic oxidation in a fluorine-containing ethylene glycol electrolyte, and an oxidation layer generated on the surface of the titanium sheet through primary anodic oxidation is removed; the titanium sheet with the oxide layer removed is subjected to anodic oxidation in an ethylene glycol composite electrolyte containing fluorine and phosphate; the titanium sheet subjected to anodic oxidation is annealed, and an anatase type titanium dioxide nanotube array with the lotus-root-shaped surface is obtained; wherein the oxidation voltage of anodic oxidation ranges from 18 V to 22 V, and the temperature ranges from 15 DEG C to 16 DEG C. And the photo-generated cathode protection performance of the titanium dioxide nanotube array on the stainless steel is obviously improved.

The invention discloses a BiOCl / TiO2 photocatalyst prepared by an electrochemical method as well as a preparation method and application thereof, and the preparation method of the BiOCl / TiO2 photocatalyst comprises the following steps: 1) placing a Ti sheet subjected to surface pretreatment in an aqueous solution containing F <-> for anodic oxidation, and then placing the Ti sheet in a muffle furnace for heat treatment to obtain an anatase type TiO2 nanotube; 2) taking the TiO2 nanotube as a working electrode, and obtaining Bi nanocrystals in a water solution containing Bi (NO3) 3 with a certain concentration, lignin calcium benzenesulfonate and an emulsifier OP-10 by adopting a pulse electrodeposition method; 3, the sample with the Bi nanocrystals deposited is subjected to electrooxidation in a Cl <-> solution under the specific pH condition, and the BiOCl / TiO2 photocatalyst is obtained.The BiOCl / TiO2 photocatalyst prepared through the electrochemical method has the advantages of being stable in structure, high in CO2 photocatalytic reduction activity and high in product selectivity.

The invention discloses a medical pure water disinfection treatment method and a disinfection system, and belongs to the technical field of water treatment. The medical pure water disinfection treatment method comprises the following steps: filtering raw water to remove large-particle impurities in the raw water; carrying out photocatalytic disinfection treatment on the filtered water by adopting a CdSe / ZnS core-shell quantum dot modified TiO2 nanotube array, and irradiating the TiO2 nanotube array by adopting a visible light source; carrying out adsorption treatment on the water subjected to photocatalytic disinfection treatment by adopting a spiral ruthenium-iridium alloy electrode, and capturing free bacteria in the water and residual bacteria corpses after photocatalytic disinfection; feeding the purified water subjected to adsorption treatment into a water consumption point; the ruthenium-iridium alloy electrode is washed by adopting reverse pulse water flow, and washing water is directly discharged. With the adoption of the medical pure water disinfection treatment method and the disinfection system, the problems of low efficiency and poor effect of existing pure water disinfection treatment can be solved.

The invention discloses a pseudocapacitance supercapacitor electrode material, a hydrogenated TiO2 nanotube and a preparation method, and belongs to the technical field of supercapacitor electrode material preparation. The invention relates to a method for preparing a hydrogen-doped titanium dioxide nanotube array (H-TiO2NTs) by using a surface hydrogenation method at normal temperature and normal pressure, and the hydrogen-doped titanium dioxide nanotube array (H-TiO2NTs) is used for loading MnO2 so as to improve the energy density and the power density of a super capacitor positive electrode material and a water-phase asymmetric super capacitor. The H-TiO2NTs is successfully prepared by taking dilute sulphuric acid, Zn and TiO2NTs as raw materials under the conditions of normal temperature and oxygen production for the first time, and the H-TiO2NTs is used as a matrix to load MnO2 through electro-deposition. The conductivity of the H-TiO2NTs is increased, so that the electrochemical energy storage performance of the composite electrode material is excellent. Compared with a traditional hydrogen atmosphere and high-temperature calcination hydrogen doping method, the method is simple in experimental condition, efficient, economical and environmentally friendly, and has a wider application prospect.

The invention discloses a preparation method of a novel tubular Ti-NATA / SnO2-Sb electro-catalytic membrane added with a titanium dioxide nanotube array (TiO2-NATA) as a middle layer. The preparation method comprises the following steps: taking SnCl4H2O and SbCl3 as raw materials, carrying out alkali washing oil removal and oxalic acid etching, putting into an ethylene glycol solution containing 0.25 wt.% of NH4F and 2wt.% of H2O for positive polarization, then carrying out cathodization in a NaClO4 solution, carrying out high-temperature calcination to obtain an intermediate layer, then preparing an ethylene glycol, citric acid, SnCl4H2O and SbCl3 composite sol-gel solution, brushing the sol-gel solution loaded metal oxide catalyst layer by using a brush according to a certain weight, and finally preparing the SnCl4H2O / SbCl3 composite sol-gel catalyst layer. And drying in a drying oven, calcining in a muffle furnace, circulating to a certain weight, and calcining for 2 hours in the muffle furnace at the temperature of 500 DEG C to obtain the tubular Ti-NATA / SnO2-Sb electro-catalytic membrane. The TiO2 nanotube array intermediate layer has good conductivity, catalytic activity and large specific surface area, and can provide more active sites and improve the electrode activity when being used for modifying the electrode; and meanwhile, the service life of the electrode can be prolonged by introducing the TiO2 nanotube array intermediate layer.

According to the preparation method of the efficient and stable photo-thermal catalytic methane dry reforming catalyst provided by the invention, CO2 and CH4 can be efficiently and stably converted into synthesis gas (CO + H2) under relatively mild photo-thermal conditions by constructing a bifunctional NiRu bimetal active site. Specifically, perovskite is used as a precursor, a sodium titanate nanotube precursor is prepared through an alkaline hydrothermal method, and then the TiO2 nanotube carrier (TNT) is synthesized through acidification and calcination. Then, nickel chloride is used as a nickel source, and Ni particles are loaded to the surface of TNT through a wet impregnation method; on the basis, ammonium hexachlororuthenate is used as a ruthenium source, Ru < 4 + > is spontaneously reduced by Ni particles through an electric position exchange method, and a Ru site is loaded near a Ni site, so that the construction of a bimetallic site is realized. In the photo-thermal catalytic methane dry reforming reaction, Ni and Ru sites are respectively responsible for activating CH4 and CO2. According to the design, the advantages of low cost and high activity of Ni and high stability of Ru are taken into consideration, a remarkable synergistic effect is generated, the catalytic activity of the catalyst exceeds the simple addition of the activity of a corresponding single-metal catalyst, so that efficient activation of non-polar reactants is realized, and finally efficient and stable catalytic performance is achieved.

The invention belongs to the technical field of photoelectrocatalysis and environmental governance, and particularly relates to a zinc cadmium sulfide / titanium dioxide composite material, a preparation method thereof and application of the zinc cadmium sulfide / titanium dioxide composite material as a composite photoanode in hydrogen sulfide photoelectrocatalytic decomposition. The zinc cadmium sulfide / titanium dioxide composite material provided by the invention comprises an anatase phase TiO2 nanotube array arranged on the surface of a conductive substrate; and the CdZnS nano-particles are deposited on the anatase phase TiO2 nano-tube array. The zinc cadmium sulfide / titanium dioxide composite material provided by the invention is applied to hydrogen sulfide photoelectrocatalytic decomposition as a composite photo-anode, has high catalytic activity, high stability and high product selectivity, realizes synchronous H2 generation and H2S detoxification, and does not need complex separation steps. According to the invention, a novel material design strategy is provided for a high-performance PEC-H2S conversion system, and a technical insight is provided for green resource utilization of sulfide pollutants.

The invention relates to the technical field of membrane separation, and discloses a multi-stage membrane separation coupling photocatalytic oxidation system and application thereof.The multi-stage membrane comprises a composite membrane base material, a microporous polymer layer and an ultrathin polyamide layer, and the composite membrane base material is prepared from, by mass, 15-20 parts of polyvinylidene fluoride, 2-6 parts of polyvinylpyrrolidone, 1-3 parts of N, N-dimethylformamide, 1-3 parts of a coupling agent, 1-3 parts of a coupling agent and 1-3 parts of a coupling agent; the oxidation system comprises a sedimentation tank, a sewage treatment tank, an ultraviolet lamp, a multi-stage membrane and an effluent buffer tank. In the photocatalytic oxidation stage, a TiO2 nanotube array loaded with precious metal platinum (Pt) is innovatively selected as a catalyst, and different from a traditional TiO2 photocatalyst, the composite material not only improves the photocatalytic efficiency, but also enhances the stability of the catalyst, and the improvement can significantly improve the degradation capacity of refractory organics, so that the photocatalytic performance of the composite material is improved. Particularly, the removal efficiency of pollutants such as antibiotics and endocrine disruptors in water is outstanding.