168 results about "Nanotube array" patented technology

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 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 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 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 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 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 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 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.

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 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.

The invention discloses an Nd-doped Bi4Ti3O12 nanotube array as well as a preparation method and application thereof, and belongs to the technical field of nano materials and piezoelectric electro-catalysis. According to the preparation method, a titanium mesh is used as a titanium source to be converted into titanium dioxide, an Nd-doped Bi4Ti3O12 nanotube array is induced to grow on the titanium dioxide, and the preparation method comprises the following specific steps: firstly, preparing a TiO2 nanotube array by adopting a two-step anodic oxidation method, then treating by adopting a hydrothermal in-situ reaction method, and preparing the Nd-doped Bi4Ti3O12 nanotube array through calcining and etching treatment. According to the preparation method, the titanium mesh is used as a titanium source, the Nd-doped Bi4Ti3O12 nanotube array can be synthesized through a simple anodic oxidation method and a hydrothermal method, Nd is further doped in the synthesis process, and efficient piezoelectric electro-catalytic performance under visible light response is achieved.

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.

A thermoelectric device comprising a nanotube array is provided. The thermoelectric device comprising: a substrate; a doping region in the substrate; a nanotube array; a first upper electrode; a second upper electrode; and a heat dissipation part arranged on an upper portion of the substrate and a lower portion of the substrate, wherein each of the nanotube arrays has a wall thickness of greater than or equal to 30 nm and less than or equal to 999 nm.

The application relates to a NiOOH / Ti-P-O nanotube array photoanode and a preparation method and application thereof. The preparation method comprises the following steps: S1, pretreated Ti sheets are sequentially subjected to anodic oxidation treatment and crystallization treatment to obtain a Ti-O nanotube array photoanode; S2, the Ti-O nanotube array photoanode is subjected to phosphating treatment, and a Ti-P-O nanotube array photoanode is obtained after cooling; and S3, the Ti-P-O nanotube array photoanode is immersed in a mixed solution containing a nickel source and urea for thermal deposition to obtain a NiOOH / Ti-P-O nanotube array photoanode. The NiOOH / Ti-P-O nanotube array photoanode can be widely applied to the field of photoelectrocatalytic water splitting. Compared with the prior art, the application provides a controllable preparation method with short time consumption, and the prepared product significantly enhances photoelectrochemical activity and improves photoelectrocatalytic efficiency.

The invention relates to a P-doped MoS2 / Co4S3 and CoP heterojunction hollow nanotube array electrode as well as a preparation method and application thereof, and belongs to the field of new energy materials such as water electrolysis and metal-air batteries. The preparation method comprises the following steps: firstly, placing a pretreated substrate material in a mixed solution of cobalt salt, urea and ammonium fluoride, and preparing a Co (OH) 2 nanowire array electrode through a high-temperature hydrothermal method; secondly, the electrode is placed in an ammonium tetrathiomolybdate solution, and a precursor is obtained through secondary high-temperature hydrothermal treatment; and finally, pyrolyzing the electrode and sodium hypophosphite in a high-temperature tubular furnace together to obtain the P-doped MoS2 / Co4S3 and CoP heterojunction hollow nanotube array electrode. The prepared electrode material has the advantages of low cost, high activity, good stability and the like, and has wide application prospects in the fields of water electrolysis, metal-air batteries, domestic sewage treatment and the like.

This invention discloses a novel welding machine, comprising: a welding frame, the welding frame including a support frame, a sealed door on the front of the support frame, a welding chamber at the upper end of the inner cavity of the support frame, and a welding table at the bottom of the inner cavity of the welding chamber. This invention belongs to the field of welding machine technology. The purpose of this invention is to solve the problems of traditional hot cathode electron beam welding machines in the prior art, where the hot cathode requires continuous preheating, has a long start-up time, and still needs to maintain a high temperature in standby mode. The technical effect achieved is: using a directional carbon nanotube array microbeam emitter as a cold cathode, utilizing the field emission principle of carbon nanotubes, an electric field is applied between the grid and the cathode to allow electrons to escape from the tip of the carbon nanotube through quantum tunneling effect, without heating the cathode to a high temperature, achieving millisecond-level instantaneous start-up, solving the drawback of traditional welding machines requiring 5-10 minutes of preheating, and significantly improving work efficiency and equipment response speed.

The present invention provides a nanotube array manufacturing method, a nanotube array, and a device, the method comprising the steps of: manufacturing a bilayer two-dimensional material having a relative include angle of lattice orientation on a substrate as a template; determining a chiral parameter of the nanotubes to be manufactured corresponding to the relative include angle of the lattice orientation of the bilayer two-dimensional material; determining a nanoribbon orientation and nanoribbon width based on the determined chiral parameter; determining a pitch between nanoribbons based on the density and nanoribbon width of the nanotubes to be manufactured; etching the bilayer two-dimensional material based on the determined nanoribbon orientation, nanoribbon width, and pitch between nanoribbons to obtain a nanoribbon array of the bilayer two-dimensional material; and thermally exciting the obtained nanotube array made of the bilayer two-dimensional material to obtain a nanotube array. The present invention can manufacture a nanotube array with controllable density, orientation, and chirality.

The application relates to the technical field of textile dyeing and finishing, and particularly discloses a foam nickel loaded nitrogen-doped carbon nanotube / Mn-Zn-P alloy composite material, a preparation method and application thereof. The preparation method is as follows: a calcium carbonate / Ni-Fe alloy layer is prepared on the surface of foam nickel; then, an organic alcohol amine and an alkyne substance are used as a nitrogen source and a carbon source to pre-deposit a nitrogen-containing carbon layer, and subsequently, N2-NH3 and N2-ethylene mixed gas is sequentially introduced to carry out stage-by-stage chemical vapor deposition, so that a Ni / nitrogen-doped carbon nanotube array is obtained; finally, Mn-Zn-P alloy particles are loaded through constant-current electrodeposition. The composite material prepared by the application has high conductivity, excellent corrosion resistance and cycle stability, and provides an ideal electrode material for electrocatalytic hydrogenation reduction, and can be directly used as an indigo reduction electrocatalytic electrode, so that the application has wide industrial application prospects in the field of blue jean dyeing.

The invention relates to the technical field of current collectors, and provides a carbon-coated current collector, a preparation method thereof, a pole piece and a battery. The carbon-coated current collector comprises a substrate and a carbon-coated layer arranged on at least one side surface of the substrate. Wherein the carbon coating layer comprises a carbon nanotube array and a sheet-shaped conductive material. The carbon nanotube array comprises a plurality of first carbon nanotubes and a plurality of second carbon nanotubes, one end of each first carbon nanotube is connected with the substrate, and the other end of each first carbon nanotube is far away from the substrate; and one end of the second carbon nanotube is connected with the side wall of the first carbon nanotube. The space between the adjacent first carbon nanotubes is filled with the sheet-shaped conductive material. According to the invention, the carbon nanotube array and the sheet-shaped conductive material are cooperatively matched, and point-line-surface combination is utilized to form a three-dimensional conductive network with anisotropy, so that the longitudinal resistance of the pole piece is remarkably reduced, and the rate capability and the cycling stability of the battery are further improved.

This invention discloses a three-dimensional hierarchical NiCo2S4@NiMo3S4 / CT bifunctional electrocatalyst, its preparation method, and its applications, belonging to the field of electrocatalytic materials technology in new energy technologies. This invention employs a combination of a two-stage hydrothermal method and an annealing method. A two-dimensional NiCo2O4 / CT precursor is grown on carbon cloth as a conductive substrate. After sulfidation, a framework NiCo2S4 nanotube array is obtained. A second hydrothermal method is then used to grow NiMo3S4 nanosheets on the NiCo2S4 / CT nanotubes. The ultrathin NiMo3S4 nanosheets provide more catalytic reaction sites, allowing the NiMo3S4 nanosheets to cover the surface of the NiCo2S4 nanotube array, thus forming a unique three-dimensional hierarchical NiCo2S4@NiMo3S4 / CT heterostructure bifunctional electrocatalyst. The three-dimensional hierarchical NiCo2S4@NiMo3S4 material obtained by this invention exhibits excellent catalytic performance, cycle stability, active sites, and a large specific surface area. The preparation method of this invention is simple, constructs a special interface, forms a rich defect and phase transition coupled electronic structure, and obtains a bimetallic sulfide with a heterostructure, which improves the electron transport rate and enhances the electrical properties of transition metal sulfides.

The application discloses a method for preparing intrinsic carbon nanotube arrays based on degradable polymers and microfluidic channels. A conjugated polymer containing degradable groups is used to separate and prepare a high-purity semiconductor carbon nanotube solution, and based on the solution, a microfluidic two-phase limited self-assembly method is used to simultaneously prepare high-density carbon nanotube arrays on two substrates. Subsequently, a weak acid solvent is used to decompose the degradable polymer wrapped on the surface of the carbon nanotube into small molecules, and through subsequent cleaning, annealing and other processes, the degradable polymer is completely removed from the surface of the carbon nanotube, so that the intrinsic carbon nanotube arrays with high semiconductor purity, high density and no polymer wrapping on the surface are obtained. The method lays a material foundation for realizing the ultimate performance of the carbon nanotube, and is favorable for early application of carbon nanotube electronic technology.

The present invention belongs to the field of gas sensing technology, and discloses a TiO2 nano-forest sensor chip modified by a strongly interconnected hybrid layer assembled by self-driven means, as well as its preparation and application. The sensor chip is a composite material of a highly conductive spacing-type titanium dioxide nano-forest array modified by a strongly interconnected hybrid layer, and comprises the following steps: preparing a spacing-type titanium dioxide nanotube array; preparing a highly conductive titanium dioxide nanomaterial; preparing an electrolyte containing polypyrrole and molybdenum salt; and preparing a titanium dioxide nanotube array modified by self-driven assembly of polypyrrole and molybdenum oxide nanoparticles. Using a large spacing titanium dioxide nano-forest array as a support and electron collector for the NO2 sensor chip provides sufficient paths and more reaction sites for the flow of NO2 gas; in addition, the modified strongly interconnected polypyrrole and molybdenum oxide hybrid nanoparticles can promote the transport of carriers, increase the number of electrons participating in the sensing reaction, and ultimately achieve high-sensitivity detection of NO2 at room temperature.

The present application relates to a kind of metal oxide hollow nanotube array material and its preparation method and application, belong to nanometer material technical field.The preparation method of the present application includes the following steps: S1, the substrate loaded with columnar micellar seed is soaked in solvent A, under oscillation condition, drop the solution of block copolymer, through stationary aging, elution and drying, obtain block copolymer nanobrush;S2, the block copolymer nanobrush of S1 is soaked in metal salt solution, after washing, again be soaked in solvent B by supercritical drying, obtain metal salt nanotube array material;S3, the metal salt nanotube array material of S2 is calcined, obtain the metal oxide hollow nanotube array material.The preparation method of the present application proposes the template guiding effect of block copolymer nanobrush, so that it can guide multifunctional metal oxide nanotube array, and on this basis, the adjustment of nanotube of different height is realized.