256 results about "Nanotube array" patented technology

The invention belongs to the technical field of medical materials, and relates to a titanium-based implant surface dual drug release system and a preparation method and application thereof. Comprising a titanium-based implant and a hydrogel layer attached to the surface of the titanium-based implant, the surface of the titanium-based implant is of a nanotube array structure, zinc oxide nanoparticles and up-conversion luminescent material particles are arranged between the titanium-based implant and the hydrogel layer, and MgO2 nanoparticles are loaded in the hydrogel layer; wherein the material of the up-conversion luminescent material particles is NaYF4: Yb < 3 + >, Er < 3 + >, and the hydrogel layer is composed of gelatin-sodium alginate hydrogel. The titanium-based implant surface dual-drug release system provided by the invention can realize loading of different drugs, can be used for treating various diseases, has a better time sequence control effect, is long in action time and low in cost, and has a wide application prospect.

The invention belongs to the technical field of electrocatalytic oxidation, and particularly relates to an electrocatalytic active anode film capable of efficiently producing active chlorine and a preparation method and application of the electrocatalytic active anode film. Porous foam titanium is used as a base material, a surface oxidation layer is removed through acidification pretreatment, a titanium dioxide nanotube array grows on the base material in situ through two times of anodic oxidation to serve as a middle layer, and the binding force of the catalyst and the substrate is effectively improved; meanwhile, Ti < 4 + > in TiO2 is partially converted into Ti < 3 + > through a cathode reduction method, so that the conductivity of the material can be enhanced; furthermore, a RuO2 catalytic layer capable of reducing the chlorine evolution potential is loaded on the titanium dioxide nanotube array, so that the electrocatalytic activity is improved. The prepared anode film has a porous structure, and when the anode film is applied to a Flow-through system, the yield of active chlorine and the contact oxidation efficiency of pollutants on an interface of the anode film are improved, and the problem of mass transfer limitation is solved. The electrocatalytic active anode film can realize high-efficiency decoloration of printing and dyeing wastewater under the conditions of no addition of chemicals and low energy consumption.

The invention belongs to the technical field of micro-nano processing, and particularly relates to a preparation method and application of a metal micro-nano tube array. Comprising the following steps: preparing a metal layer on the surface of a substrate; coining glue is sprayed on the surface of the metal layer, then coining is conducted through a template, and a micro glue column array is formed after curing; a plasma etching process is adopted, the micro glue column array is used as a mask, the metal layer exposed out of the gaps in the bottom of the micro glue column array is etched, and a structure with the micro glue columns wrapped by metal is formed; and removing the rubber columns in the structure of the metal-coated micro rubber columns to obtain the metal micro-nano tube array. According to the invention, a residual-layer-free imprinting technology is adopted, the problem of glue layer residue in traditional imprinting is avoided, and the etching uniformity is improved. A plasma dynamic balance process is adopted, the side wall redeposition effect of etching by-products is utilized, and the metal micro-nano tubes are formed in a self-assembly mode. The prepared metal micro-nano tube array has high aspect ratio compatibility, and the nano tube array with the aspect ratio as high as 10: 1 can be realized.

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 belongs to the technical field of environmental engineering, and discloses preparation of a phosphorus-bridged iron-nickel monatomic / TiO2-x nanotube array electrode and application of the phosphorus-bridged iron-nickel monatomic / TiO2-x nanotube array electrode in advanced treatment of pharmaceutical wastewater. The P-bridged Fe and Ni monatomic loaded TiO2-x NTA photo-anode material is prepared by adopting a template-quenching-exogenous calcination phosphating method. By optimizing and regulating a monatomic coordination environment, an atomic-scale interface structure and a carrier defect state, monatomic d orbital electrons are activated, interaction between monatomic and a carrier is enhanced, and the purpose of improving monatomic catalytic activity and stability is achieved. A photoelectrocatalytic degradation system is constructed on the basis of a FeNiPx / TiO2-x NTA photo-anode, a reaction energy barrier in the active species generation process is reduced through the synergistic effect between single atoms and a substrate, and the generation amount of active species in the system is increased. The material is simple in preparation method and easy for large-scale production, can be directly used in the existing photoelectrochemical device, and can greatly save the transformation and operation cost.

The invention discloses a preparation method and application of a nickel-doped lead dioxide ozone catalytic anode, a titanium substrate is used as an anode, a titanium sheet is used as a cathode for anodic oxidation, an obtained titanium dioxide nanotube array is used as an anode, a titanium sheet is used as a cathode for secondary anodic oxidation, and the nickel-doped lead dioxide ozone catalytic anode is obtained. And putting the obtained titanium dioxide nanotube array electrode of the new oxide layer into a tubular furnace, calcining in an air atmosphere, taking the titanium dioxide nanotube array electrode of the transition layer as a cathode, taking a titanium plate as an anode, and performing electrochemical reduction in a formic acid solution to obtain the titanium dioxide nanotube array electrode of the transition layer. The obtained electrode with the high-conductivity titanium dioxide nanotube array transition layer serves as an anode, a titanium sheet serves as a cathode, electrodeposition is carried out in an acid electrodeposition solution to obtain a beta-PbO2 layer, and finally the Ti / TNAs / Ni-PbO2 anode is prepared, the anode is high in stability and long in service life and can work for a long time without affecting the catalytic activity of the anode, and the application range of the Ti / TNAs / Ni-PbO2 anode is wide. The method has a certain application prospect in the aspect of electro-catalytic ozone treatment of organic wastewater.

The invention relates to the technical field of energy storage, in particular to an iron monatomic modified carbon nanotube array, a preparation method and application of the iron monatomic modified carbon nanotube array in an aqueous zinc-iodine battery, simple and convenient solid-phase reaction and high-temperature carbonization strategies are adopted, carbon cloth serves as a substrate, ferric acetylacetonate, boric acid, polyethylene glycol and urea serve as an iron source, a boron source, a carbon source and a nitrogen source respectively, and the iron monatomic modified carbon nanotube array is prepared. And after high-temperature calcination, growing an iron monatomic modified carbon nanotube array on the carbon cloth in situ. The iron single atom not only enhances the chemical capture capability of the carbon nanotube on the polyiodide, but also promotes the oxidation-reduction conversion of iodine; the carbon nanotube array provides a physical space for limited adsorption of iodine species and effectively promotes ion diffusion. Therefore, the obtained water-based zinc-iodine battery shows high specific capacity and good cycling stability. The whole technological process is simple and convenient to operate, has industrial application prospects, and provides a novel preparation method for the carbon-based iodine positive electrode host material of the aqueous zinc-iodine battery.

The invention relates to a composite negative electrode of an all-solid-state battery, a preparation method of the composite negative electrode and the all-solid-state battery. The composite negative electrode comprises a nanotube lithium storage layer and a doped carbon layer which are laminated, the doped carbon layer comprises a carbon material and noble metal particles doped in the carbon material; the nanotube lithium storage layer is a nanotube array layer, the nanotube array layer comprises nanotubes and pore channels which are consistent in arrangement direction, and the pore channels comprise main pore channels in the nanotubes and auxiliary pore channels formed between the nanotubes; the placement direction of nanotubes in the nanotube array layer is perpendicular to the surface direction of the doped carbon layer. According to the composite negative electrode provided by the invention, the nanotube lithium storage layer is constructed on one side of the doped carbon layer, and through the synergistic effect of the main hole channel and the auxiliary hole channel in the nanotube lithium storage layer, a lithium storage place is provided together, so that the phenomena of volume expansion and shrinkage during lithium deposition and stripping are inhibited, and the electrochemical performance of the all-solid-state battery is improved.

The invention relates to the technical field of electrocatalytic oxidation and water treatment, in particular to a preparation method and application of an electric anode film capable of efficiently breaking and degrading a metal organic complex. The titanium dioxide nanotube array with ordered height grows on the porous foam titanium substrate in situ, so that the specific surface area is increased, and the service life is prolonged; by doping Ti < 3 + >, the defect that a traditional titanium dioxide nano array tube is poor in conductivity is overcome; meanwhile, lead dioxide is loaded to improve oxygen evolution reaction (OER) potential, OH is efficiently generated, and pollutants are thoroughly mineralized; ferric oxide is further introduced as an active doping agent, so that the leaching of Pb < 2 + > can be improved. Continuous flow stable operation is realized by virtue of a porous film-shaped structure of a porous titanium substrate, the contact oxidation efficiency of pollutants on an anode film interface is increased, and the problem of limited mass transfer of the pollutants is solved; the electric anode film can realize complex breaking and degrading effects on a metal organic complex.

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 is a method for fluorescent detection of copper ions. The method uses an amino-functionalized zirconium dioxide nanotube array film as a carrier and rhodamine B as a fluorescent probe, and immobilizes copper ions and rhodamine B on the amino-functionalized zirconium dioxide nanotube array film carrier to prepare a detection sample, and the detection of copper ions can be achieved by testing the fluorescence intensity of the detection sample. The method is simple and easy to implement, has good detection performance, low cost, small amount of waste liquid, and the amino-functionalized zirconium dioxide nanotube array film carrier can be regenerated and reused.

The invention belongs to the technical field of photoelectrocatalytic materials, and particularly relates to a reticular Cu2O / TiO2 composite p-n type heterojunction photoelectrocatalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, adopting a crisscrossed titanium mesh as a substrate, preparing a mesh-shaped TiO2 nanotube array through a dual-electrode oxidation method, and then loading p-type semiconductor Cu2O onto a wide-band-gap n-type semiconductor TiO2 nanotube array through an electrochemical deposition method, so as to prepare the mesh-shaped Cu2O / TiO2 composite p-n type heterojunction photoelectric catalytic material. Compared with a TiO2 material, when the material is used as a photoelectrocatalysis material to prepare hydrogen, the light absorption band edge of TiO2 is widened, the light energy utilization rate of TiO2 is improved, the performance of TiO2 in the aspect of photoelectrocatalysis hydrogen preparation is greatly improved, and the material is suitable for photoelectrocatalysis hydrogen preparation and belongs to the fields of chemical materials, new energy, environment and the like. The problem that the conversion efficiency is low when hydrogen is prepared through pure TiO2 photoelectrocatalysis is solved.

The present invention discloses a preparation method and application of a cadmium sulfide nanotube array catalyst. First, a cadmium sulfide nanorod array is prepared on a conductive glass by a hydrothermal method; then, a cadmium sulfide nanotube array catalyst is prepared by etching the cadmium sulfide nanorod array using a photolithography method. The cadmium sulfide nanotube array catalyst prepared by the present invention utilizes the excellent visible light absorption characteristics of cadmium sulfide to improve the light energy utilization rate, and uses a tubular nanostructure with a large specific surface area to increase the active area of the photoelectrocatalytic water splitting reaction, effectively promoting the separation and transmission of photogenerated carriers, inhibiting the recombination of photogenerated carriers, and showing excellent photoelectrocatalytic water splitting hydrogen production performance. The process of the present invention is simple, the synthesized substance has high purity, the size is at the nanometer level, and the raw materials used are cheap, which is suitable for the field of photoelectrocatalytic water splitting hydrogen production.

The invention belongs to the technical field of solid-state lithium metal batteries. The invention provides a mixed ion / electron conductor intermediate layer with a directional double-layer structure. The mixed ion / electron conductor intermediate layer comprises a titanium nitride nanotube array and lithium ion conductor layers deposited on the inner surface and the upper surface of the titanium nitride nanotube array. The lithium ion conductor layer on the upper layer of the directional double-layer structure mixed ion / electron conductor intermediate layer has high lithium ion conductivity and low electron conductivity, and can inhibit nucleation of lithium on an electrolyte interface and growth of lithium dendrites; the lower layer can guide lithium to realize uniform deposition and stripping in the nanotubes through a creep mechanism, and stress is effectively released, so that the electrochemical performance of the battery is improved; the creep path of lithium deposition stripping can be shortened, and the diffusion and transmission capability of lithium ions can be remarkably enhanced by matching with a lithium ion conductor with a high lithium ion diffusion rate; the middle layer is thin and controllable in thickness, the overall energy density of the battery is hardly reduced, and the application prospect is good.

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 bismuth oxyiodide modified oxygen-vacancy-enriched titanium dioxide nanotube array and a preparation method and application thereof, which realize wide-range and efficient light response efficiency: BiOI (forbidden bandwidth is approximately equal to 1.8 eV) is used as an excellent visible-light-driven photocatalyst and forms a semiconductor heterojunction with TNAs after being loaded, the spectral response range of the material is widened to a visible light wave band, and the visible-light-driven visible-light-driven photocatalyst can be used for preparing a visible-light-driven photocatalyst. And the construction of interface oxygen vacancies also improves the transmission efficiency of photon-generated carriers, so that the photocatalytic efficiency and the visible light utilization rate of the material are greatly improved. The material prepared by the invention can be used for a long time after being fixed in a reactor, and after the material is recycled for 20 times, the degradation rate of typical refractory organic matters in single 60 minutes can still be kept above 90%.

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 relates to a preparation method of a high-thermal-conductivity hot-pressed sheet based on a flexible graphite paper vertical arrangement carbon nanotube array, which comprises the following three steps: in-situ growth, vacuum impregnation and vacuum hot pressing: firstly, mixing a certain amount of polycarbosilane with a xylene solution to obtain a polycarbosilane solution; then spin coating is carried out on the two faces of the graphite paper subjected to heat treatment, a polycarbosilane coating is obtained, the polycarbosilane coating is cracked at the high temperature, and the graphite paper containing the silicon carbide coating is obtained. And then carrying out in-situ chemical vapor deposition on the two surfaces of the graphite paper containing the silicon carbide coating to grow a regularly arranged carbon nanotube array. The obtained composite material is subjected to vacuum impregnation in a mesophase pitch solution, so that gaps among the carbon nanotube arrays are fully filled with micromolecular pitch; and finally, carrying out vacuum hot pressing treatment to obtain the graphite paper / vertically-arranged carbon nanotube array high-thermal-conductivity hot-pressed sheet with high density, high thermal conductivity and high mechanical strength. The obtained three-dimensional composite material is of an obvious three-dimensional layered structure, has excellent directional heat conduction performance and mechanical strength, and plays a certain role in practical application of efficient heat management materials.

The invention provides selenium nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of selenium nanoparticles. Acetone ultrasonic cleaning and chemical polishing pretreatment are performed on a pure titanium substrate to obtain a clean surface, an anodic oxidation method is adopted to prepare a # imgabs0 # nanotube array carrier, and the nano-particles are prepared into selenium nano-particles. The method comprises the following steps: accurately depositing selenium nanoparticles on a carrier by using an electrochemical deposition method, realizing load control by combining an electrochemical kinetics principle, realizing uniform dispersion of the particles by matching an ultrasonic dispersion technology with a particle swarm optimization algorithm, and carrying out centrifugal separation and vacuum drying to obtain a spherical selenium nanoparticle product. And a multi-dimensional quality control detection system of a transmission electron microscope, an X-ray photoelectron spectroscopy and dynamic light scattering is established, so that the technical problems that the particle size distribution is non-uniform and the deposition load is difficult to accurately control in the preparation process of the selenium nanoparticles are solved.

The invention relates to the technical field of nano materials, in particular to a CoMo-BTNT anode, a preparation method and application thereof, and the preparation method comprises the following steps: preparing a Ti substrate; preparing a titanium dioxide nanotube array by using a Ti substrate; co-Mo oxide layer deposition liquid is deposited on the surface of TNA through a direct-current electrodeposition method, then annealing heat treatment is conducted, and CoMo-TNA is prepared; preparing a CoMo-BTNT anode by taking CoMo-TNA as a cathode and a Pt sheet as an anode; the invention also provides an application of the CoMo-BTNT anode in degradation of antibiotics in water. According to the invention, TNA is used as a base layer, an active CoMo oxide layer is deposited on the TNA base layer, the TNA base layer has good electrical conductivity and electro-catalytic performance, the electrical conductivity of the anode is improved, an effective electrically-assisted activated PMS degradation tetracycline system is constructed, and a new solution thought is provided for treatment of tetracycline wastewater.

The invention belongs to the technical field of preparation of semiconductor nanomaterials, and discloses a large-scale preparation of a g-C3N4 nanotube array with a high nitrogen ratio and a preparation method thereof, and the preparation method comprises the following steps: (1) preparing a single nitrogen source mixed solution by using urea; (2) adding hydroxylamine sulfate to obtain a multi-nitrogen-source mixed solution; (3) adding melamine to obtain a dispersion liquid of a multi-nitrogen-source mixed melamine system; (4) carrying out a hydrothermal reaction, and cleaning and drying a reaction product to obtain precursor powder of the multi-nitrogen-source doped melamine, which has a nano columnar array structure; and (5) calcining to obtain the g-C3N4 nanotube array nano material with the high nitrogen ratio. The g-C3N4 nanotube array material can be obtained without the aid of rigid template induction assisted synthesis, and the problems of complex and dangerous operation process, low product purity, time consumption and low yield in the prior art can be solved.

The invention relates to the technical field of medical instruments, in particular to a variable-diameter blood seepage prevention artificial blood vessel based on a multi-layer composite structure, which comprises a composite artificial blood vessel main body, and a bioactive composite layer is arranged on the outer side of a gradient pore polyester woven layer. The main body of the composite artificial blood vessel is composed of more units such as the first artificial blood vessel part, the second artificial blood vessel part, the third artificial blood vessel part and the fourth artificial blood vessel part, and the inner diameter difference between every two adjacent units is 2.0 mm, so that the variable-diameter structure is more suitable for natural blood vessels of people clinically; in addition, the bioactive composite layer comprises type I collagen, heparin sodium and VEGF sustained release microspheres, the collagen / heparin composite layer forms a hydrated gel barrier when in contact with blood, the errhysis volume is reduced to 1 / 16 of that of a traditional product, endothelial cell migration is promoted by utilizing TiOnanotube array layer and VEGF sustained release synergy, and in addition, under the pulsating pressure of 120 mmHg, through 1 million times of cycle tests, the effective rate of the collagen / heparin composite layer is greatly increased. The structural integrity retention rate is larger than 99%, and the mechanical fatigue resistance is high.

The invention relates to the technical field of water treatment, in particular to an induction type tap water mineralization filter element based on high metasilicic acid elements, which is sequentially and coaxially provided with a supporting structure, a mineralization function core structure and a filtering protection structure from inside to outside, the support structure is formed by a ternary blend of polyether sulfone, polyamide and graphene quantum dots through a stepped thermal crosslinking process; the mineralization function core structure is composed of a layered magnesium aluminum silicate carrier, rare earth doped hydroxyapatite and an ion imprinted polymer, and the filtering protection structure is composed of a zirconium oxide coated silver doped titanium dioxide nanotube array. Based on a ternary composite mineralization system, the filter element achieves multi-path synergistic mineralization in dynamic water flow, the ZrO2 coating layer regulates and controls the Ag release rate to be smaller than or equal to 0.05 mg / L, and the antibacterial rate gt is guaranteed; meanwhile, the risk that silver ions exceed the standard is avoided, organic pollutants are effectively repelled, diffusion of inorganic ions is promoted, and the compressive strength of the polyether sulfone-polyamide-graphene quantum dot ternary matrix reaches 8-12 MPa.

The application relates to the technical field of nanomaterials, in particular to a CoMo-BTNT anode, a preparation method and application thereof, wherein the preparation method comprises the following steps: preparing a Ti substrate; preparing a titanium dioxide nanotube array by using the Ti substrate; depositing a Co-Mo oxide layer deposition solution onto the surface of the TNA through a direct current deposition method, and then performing annealing heat treatment to prepare a CoMo-TNA; and preparing the CoMo-BTNT anode by taking the CoMo-TNA as a cathode and a Pt sheet as an anode; the application further provides application of the above CoMo-BTNT anode in antibiotic degradation in water; the application takes the TNA as a base layer, and deposits an active CoMo oxide layer thereon; the CoMo-BTNT anode has good conductivity and electrocatalytic performance, the conductivity of the anode is improved, an effective electrically assisted activated PMS tetracycline degradation system is constructed, and a new solution idea is provided for tetracycline wastewater treatment.

This invention discloses a hybrid conductor with continuous ion and electron transport channels, its preparation method, and its applications, belonging to the field of solid-state lithium metal battery technology. This invention uses a lithiophilic modified titanium nitride nanotube array and a solid electrolyte interface film to form a hybrid conductor with continuous ion and electron transport channels. This promotes uniform deposition and stripping of lithium within the nanotubes via a creep mechanism, effectively releasing stress and improving the battery's electrochemical performance. The titanium nitride nanotube array not only improves the overall conductivity of the electrode material but also adapts to the volume changes of the negative electrode during charge-discharge cycles. Furthermore, titanium nitride is stable for lithium, reducing side reactions during cycling.

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.

Part for a timepiece movement, made of a composite material comprising a rigid matrix and a forest of nanotubes contained in the rigid matrix.

This invention discloses a method for fabricating flexible radio frequency (RF) devices based on dry transfer of carbon nanotube arrays, specifically comprising: 1) fabrication of a rigid support layer; 2) fabrication of a carbon nanotube array protective layer; 3) fabrication of an auxiliary layer; 4) full peeling and unwrapping; 5) attachment to the target substrate; 6) thermal release transfer of the array film; 7) residual adhesive cleaning; 8) low-temperature annealing; 9) top-down patterning; 10) defining the gate region; and 11) gate fabrication. This invention utilizes a rigid material to mechanically support the thermal release adhesive peeling process, uses a metal protective layer to prevent organic adhesive from contaminating the carbon nanotube film material, and constructs an auxiliary layer to solve the stress matching problem between the two during the transfer process. This achieves complete peeling of the carbon nanotube array to the flexible substrate with high-quality, non-destructive transfer. The RF transistor device fabricated by this invention can meet the needs of future high-speed communications.

The invention discloses a preparation method and application of a cadmium sulfide nanotube array catalyst, and the preparation method comprises the following steps: firstly, preparing a cadmium sulfide nanorod array on conductive glass by using a hydrothermal method; and then etching the cadmium sulfide nanorod array by utilizing a photoetching method to prepare the cadmium sulfide nanotube array catalyst. According to the prepared cadmium sulfide nanotube array catalyst, the excellent visible light absorption characteristic of cadmium sulfide is utilized, the light energy utilization rate is increased, the tubular nanostructure with the large specific surface area is utilized, the active area of the photoelectrocatalytic water decomposition reaction is increased, separation and transmission of photon-generated carriers are effectively promoted, compounding of the photon-generated carriers is inhibited, and the photocatalytic activity of the photoelectrocatalytic water decomposition reaction is improved. The excellent performance of producing hydrogen by photoelectrocatalytic decomposition of water is shown. The method has the advantages of simple process, high purity of the synthesized substance, nanoscale size and cheap raw materials, and is suitable for the field of hydrogen production by photoelectrocatalytic decomposition of water.

The application belongs to the technical field of proton exchange membrane fuel cell, and relates to a hydrophobicity-adjustable alloy nanotube array electrode for fuel cell and preparation and application thereof. Specifically, the application comprises preparation of metal nanotube array, alloying and hydrophobization of the metal nanotube array, and assembly of the membrane electrode. First, a metal nanotube array is constructed on a substrate surface through a two-step hydrothermal method; then, a hydrophobic substance is introduced into the metal nanotube array by means of immersion or ultrasonic spraying; then, pyrolysis is performed to realize alloying and hydrophobization of the nanotube array; finally, the nanotube array is transferred to a proton membrane, and the membrane electrode is cleaned. The membrane electrode can be applied to a proton exchange membrane fuel cell. The hydrophobicity-adjustable nanotube array electrode prepared by the application has the advantages of high catalyst activity and stability, low platinum loading, good water management, and easy scaling-up.