320 results about "Nanoporous" patented technology

The invention discloses a thermal insulation material with enhanced thermal insulation performance and a processing method, and relates to the technical field of thermal insulation material processing. Comprising the following components in parts by weight: 100 to 200 parts of a nanopore matrix material, 20 to 120 parts of expanded perlite, 10 to 350 parts of polystyrene, 30 to 300 parts of polyurethane, 100 to 500 parts of nano titanium dioxide, 10 to 60 parts of graphene, 10 to 40 parts of silica sol and 1 to 55 parts of ferric oxide. A multi-stage pore structure is constructed through a nanopore matrix and expanded perlite, closed-cell foam of polystyrene and polyurethane is combined, and nano titanium dioxide and graphene functional filler are matched, so that the heat conductivity coefficient is reduced to 0.018 W / (mK) or below, the heat insulation efficiency is remarkably improved, nanoscale homogenization is ensured through high-shear dispersion in the process, the porosity is reserved through freeze drying, and the heat insulation performance is greatly improved. The microcapsule self-repairing layer can repair more than 85% of cracks, the service life is greatly prolonged, and in the aspect of function integration, the material has A-level fireproof, waterproof and weather-proof characteristics and heat preservation and heat insulation performance.

A ternary positive electrode material modified with a glassy metal-organic framework, and a preparation method therefor and the use thereof. The ternary positive electrode material modified with a glassy metal-organic framework is obtained by grinding and mixing a ternary positive electrode material and a metal-organic framework, and then subjecting same to a melt quenching treatment under a protective atmosphere. Forming a crack-free glassy metal-organic framework containing nano / sub-nano pores on a surface of the ternary positive electrode material can significantly improve the stability of the ternary positive material, alleviate the dissolution of transition metals, and ultimately improve the electrochemical performance of batteries and prolong the service life of the batteries.

The invention discloses a cellulose paper-based diaphragm for a zinc-iodine battery as well as a preparation method and application of the cellulose paper-based diaphragm. The diaphragm is of a three-layer composite structure and comprises a matrix layer formed by paper pulp fibers such as softwood pulp, hardwood pulp, bamboo pulp or straw pulp through a wet papermaking technology, and compact functional layers which cover the two sides of the matrix layer and are formed by oxidized nanocellulose (TOCN). The preparation method mainly comprises the following steps: preparing the paper-based diaphragm matrix through wet papermaking, coating the two sides of the paper-based diaphragm matrix with TOCN aqueous dispersion, and finally carrying out hot-pressing drying treatment to enable the three layers to be tightly combined. According to the invention, the nano aperture and the surface negative electricity functional group of the TOCN layer are utilized, so that physical blocking and electrostatic repulsion of polyiodide ions can be realized at the same time, and the shuttle effect is effectively inhibited; and the uniform pore channels can guide zinc ions to uniformly deposit and inhibit dendritic crystal growth. The diaphragm is green in raw material, simple in process and low in cost, and the cycle life and coulombic efficiency of the battery can be remarkably improved when the diaphragm is applied to the zinc-iodine battery.

The invention relates to a high-pressure hydrogen nano-pore permeability testing device and method based on double-chamber pressure balance, and belongs to the technical field of unconventional oil gas. The device comprises a high-pressure gas source, a pressurization module, a double-layer nested core reaction kettle module and a high-frequency data acquisition and safety monitoring module; by constructing a double-layer nested structure that inner cavity hydrogen is actively wrapped by outer cavity nitrogen and cooperating with an all-metal knife edge hard sealing device and a different flow pattern permeability calculation method, accurate measurement of the Ndarcy grade permeability of the compact cover rock is successfully achieved, the industrial pain point that a traditional device is inaccurate in measurement, unstable in measurement and unsafe is thoroughly solved, and the method is suitable for large-scale popularization and application. And key experimental technology guarantee and scientific data support are provided for closure evaluation of underground hydrogen storage engineering and exploration and development of natural hydrogen resources.

The invention relates to the technical field of microcosmic measurement, and discloses a morphology construction method, device and equipment of a nanoporous material and a medium, and the method comprises the following steps: obtaining profile data of the nanoporous material; determining a baseline of the profile data based on the profile data; based on the profile data and the base line, pore parameters are obtained, and the pore parameters comprise the pore diameter, the pore depth and the porosity; and based on the pore parameters, constructing the morphology of the nano-pore material. According to the method, the limitation of a traditional measurement method is effectively overcome, the complete three-dimensional shape of the nano-porous material can be constructed, and the method is also suitable for various nano-porous materials including but not limited to porous media such as energy storage materials, catalytic materials, biomedical materials and shale.

The invention provides a heterostructure salinity difference energy conversion film based on HOF / two-dimensional mesoporous carbon as well as a preparation method and application of the heterostructure salinity difference energy conversion film. The salinity difference energy conversion film comprises a two-dimensional mesoporous carbon layer serving as a hydrophobic layer and a hydrogen bond organic framework layer which covers one surface of the hydrophobic layer and serves as a hydrophilic layer, wherein the two-dimensional mesoporous carbon layer is formed by compounding a two-dimensional mesoporous carbon material with regular nanopores and aramid nanofibers; the hydrogen bond organic framework layer is formed by compounding a hydrogen bond organic framework material and aramid nanofibers; the heterogeneous Janus structure salinity gradient energy conversion membrane is constructed by adopting a hydrogen bond organic framework and a two-dimensional mesoporous carbon material, and when the heterogeneous Janus structure salinity gradient energy conversion membrane is applied to salinity gradient energy conversion, high ion selectivity, high structural stability and high ion migration flux can be considered.

The invention provides a nano plugging agent for a high-temperature-resistant shale oil gas water-based drilling fluid and a preparation method of the nano plugging agent, and relates to the technical field of drilling plugging agents. The nano blocking agent for the high-temperature-resistant shale oil-gas-water-based drilling fluid is a nano composite precursor aqueous dispersion which is stable at normal temperature, and can be triggered under the underground high-temperature condition and generate in-situ reaction in shale pores and on the surface to form an organic-inorganic hybrid blocking film. According to the technology, a conventional chemical raw material is converted into a high-performance plugging material in a low-viscosity precursor underground in-situ film forming mode, the industrial problem of efficient plugging of shale nano apertures is solved, and the core advantage is that the problem of a traditional physical accumulation mode is solved; a compact and tough organic-inorganic hybrid plugging film is formed in pores through temperature triggering, and plugging is changed into repairing.

The invention belongs to the technical field of electro-catalysis carbon dioxide reduction, and particularly relates to a three-dimensional porous copper oxide-zinc bimetallic film electrode for electro-reduction of carbon dioxide and preparation and application of the three-dimensional porous copper oxide-zinc bimetallic film electrode. The preparation method comprises the following steps: firstly, carrying out surface pretreatment on a copper substrate, then carrying out pulse current electrodeposition and dynamic etching on the surface of an electrode in a mixed electrolyte containing zinc salt, copper salt and sodium salt, and finally, carrying out constant current structure reconstruction on the electrode by adopting a long-time reduction method to prepare the three-dimensional porous copper oxide-zinc bimetallic film electrode. The electrode has a unique nano pore channel structure, rapid transfer of interface charges is promoted, and the electrode has rich active sites due to the synergistic effect of a heterostructure. The preparation method has the dynamic regulation and control advantage of pulse deposition and the structural stability of constant-current deposition, a template agent does not need to be added in the preparation process, and the process controllability is high. The obtained electrode shows excellent CO product selectivity, activity and stability in an electro-catalysis carbon dioxide reduction reaction.

The invention relates to the technical field of environmental and biological analysis and detection, in particular to a method for extracting perfluorinated / polyfluorinated compounds based on confinement fluid. The method comprises the following steps: providing a multi-dimensional reticular nanopore material; growing mutually staggered carbon nanofibers on the surface of a substrate through a chemical vapor deposition method; loading a confinement fluid in a pore channel of the multi-dimensional reticular nano-pore channel material; contacting the material with a to-be-detected sample, and extracting; desorbing the extracted material by using a desorption solvent to obtain a desorption solution; and detecting the perfluorinated / polyfluorinated compounds in the desorption solution. A multi-dimensional net-shaped nano pore channel formed by mutual staggering of the carbon nanofibers provides a stable multi-dimensional micro-nano confinement space for confinement fluid. According to the structure, mass transfer and distribution of a target analyte from a complex matrix to a confinement fluid are greatly promoted, so that efficient enrichment of various perfluoro / polyfluoro compounds is realized, and the recovery rate and the detection sensitivity of the method are improved.

The invention provides a hybrid material for MOF confinement catalytic growth of nano silicon and a preparation method of the hybrid material, and relates to the technical field of batteries. According to the preparation method, collapse of a pore structure caused by severe decomposition is avoided through gradient temperature rise, ordered carbonization of an MOF framework is realized, a hierarchical porous carbon-based framework is formed, the MOF derived carbon framework has a three-dimensional porous structure, and the hierarchical structure better buffers silicon expansion stress; metal sites in MOF porous carbon catalyze silane decomposition, and oriented deposition of silicon atoms is achieved in sub-nano pore channels; the MOF confinement catalytic growth silicon nanowire / particle hybrid material is obtained through cooperation of pore structure design and catalytic growth, meanwhile, the selected MOF is rich in nitrogen element, nitrogen doping is achieved after carbonization, and therefore the electrochemical performance is improved; cracking acetylene (CH) to coat a carbon layer on the silicon surface and the porous carbon precursor to form a core-shell structure (Si (at) C); the silicon surface is passivated by the carbon layer, volume expansion in the charging and discharging process is inhibited, and the cycling stability is improved.

The invention belongs to the technical field of eutectic high-entropy alloys and nano hierarchical pore structures, and discloses an eutectic high-entropy alloy with a hierarchical nano pore structure, and a preparation method and application thereof. The alloy comprises the following elements in percentage by atom: 14 to 45 at.% of Co, 4 to 20 at.% of Cr, 4 to 20 at.% of Fe, 15 to 42 at.% of Ni, and 15 to 30 at.% of Al. Due to the unique FCC + BCC dual-phase structure and the nano hierarchical pore structure, the eutectic high-entropy alloy prepared by the method not only has high chemical stability and corrosion resistance, but also provides more active sites, and shows obvious advantages in the aspect of electro-catalytic performance compared with a traditional single catalyst (such as platinum, gold, palladium and the like), and the method is low in requirement on experimental equipment and suitable for industrial production. Large-scale preparation can be realized, and wide application prospects in the fields of electro-catalysis and the like are shown.

The invention belongs to the field of aerogel composite materials, and discloses a heat insulation and wave absorption integrated aerogel composite material which at least has a three-stage pore network structure, the secondary structure is a continuous carbon network and is loaded in pores of the primary structure; the tertiary structure is silicon oxide aerogel with nano pores, and is polymerized on the surface of the secondary structure and in the pores in situ. The aerogel composite material is low in heat conductivity coefficient, good in heat insulation performance, excellent in wave absorbing performance and high in mechanical strength. The invention further discloses a preparation method of the material, the carbon-silicon dioxide composite material prepared through sol-gel and supercritical fluid drying is low in aerogel density and small in pore diameter and has a good barrier effect on solid heat transfer and gas heat transfer, and the prepared composite material has low heat conductivity and good heat conductivity. The continuous carbon network endows the material with excellent wave-absorbing performance.

The invention relates to the technical field of lithium ion batteries, in particular to a composite solid electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyoxyethylene, lithium bis (trifluoromethylsulfonyl) imide and acetonitrile, then adding a Prussian blue analogue, stirring, and carrying out ultrasonic treatment to obtain a mixed solution; and preparing the mixed solution into the composite solid electrolyte by adopting an electrostatic spinning mode. According to the invention, the Prussian blue analogue with a three-dimensional nanopore structure and a high specific surface area is selected as a raw material, and after the composite solid electrolyte is prepared, the pores of the composite solid electrolyte are relatively large and are uniformly distributed. The special pore structure constructs a more stable and more efficient ion conduction channel, so that the ion conduction is smoother, and the electrochemical performance is improved.

The application provides a preparation system and application of a nano-bubble liquid; the system comprises a first gas supply assembly, a second gas supply assembly, a first liquid device, a second liquid device, a bubble generator, a buffer and a booster pump; the first gas supply assembly provides mixed gas with a carbon dioxide to air volume ratio of 8:2 to a first spiral pipe, the second gas supply assembly provides air to a second spiral pipe, nano-pores are uniformly distributed on the surfaces of the two pipes, and a nano-level filter membrane is arranged at the inlet and outlet of the generator; the first liquid device injects a base liquid into a closed cavity of the generator, the generated solution passes through the second liquid device filled with a stable solution, and then is sent out through the buffer and the booster pump; the system can accurately control the proportion of bubbles, solves the problems of easy dissolution and agglomeration and dispersion of single carbon dioxide bubbles, and finally obtains a stable nano-bubble liquid.

This application provides a copolymer membrane, its preparation method, and its application. The copolymer membrane is a hydrophilic-hydrophobic or hydrophilic-hydrophobic-hydrophilic bilayer structure, wherein the hydrophobic ends are cross-linked by unsaturated bonds. This application uses thermal cross-linking to cross-link the hydrophobic ends of the bilayer structure through unsaturated bonds. This method improves membrane stability; it also immobilizes nanoporins within the membrane, increasing the bonding strength between the pores and the membrane and reducing the risk of nanoporin detachment; furthermore, it significantly reduces the need for light-transmitting materials for UV cross-linking, lowering costs; and it avoids the adverse effects of free radicals generated by chemical cross-linking on the porous proteins.

The application provides a preparation method of a two-dimensional layered silicate mineral film treated by a reducing modifier, which comprises the following steps: firstly, organic modification of a two-dimensional layered silicate mineral by a reducing ionic liquid; then, loading of the reducing modifier into the interlayer of the two-dimensional layered silicate mineral; and finally, construction of a two-dimensional channel by vacuum filtration to prepare a film with a thickness of 5-20 microns. The two-dimensional layered silicate mineral film obtained by the method has a large surface area and can effectively treat heavy metal Cr(VI). The construction of the two-dimensional channel provides a limited space for the reducing modifier to prevent oxidation and provides abundant sites for the oxidation-reduction reaction in the nanopore channel, and solves the problems of desorption difficulty and secondary pollution caused by the traditional adsorption method for treating heavy metals.

The invention relates to a modified asphalt sizing material, which is prepared from the following components in percentage by weight: 35.5 to 38.5 percent of 70 # asphalt, 6.5 to 9.5 percent of base oil, 4.5 to 5.5 percent of aromatic oil, 3.5 to 4.5 percent of SBS (Styrene Butadiene Styrene), 5.5 to 6.5 percent of SIS (Styrene Isoprene Styrene), 5.5 to 6.5 percent of SBR (Styrene Butadiene Rubber) powder, 1.9 to 2.1 percent of blocked isocyanate, 0.06 to 0.08 percent of activating agent, 4.5 to 5.5 percent of porous silicon dioxide and 24 to 30 percent of powder. The modified asphalt sizing material can trigger the activating agent to catalyze the deblocking of the blocked isocyanate at the processing temperature of 180 + / -2 DEG C to release-NCO groups, the-NCO groups can react with trace moisture in an asphalt system to generate CO2 gas, in the rubber layer forming process, CO2 is wrapped by the asphalt in a viscoelastic state to form a uniform closed-cell foam structure, and in the forming process of a rubber layer, the modified asphalt sizing material can be used for forming an asphalt layer. According to the structure, liquid water permeation is blocked by utilizing the characteristic that the surface tension of liquid water is greater than that of a bubble wall, and an initial channel is constructed for vapor diffusion; furthermore, closed-cell foam is bridged by utilizing nano-pores of porous silicon dioxide, a'nano-pore adsorption-micropore diffusion 'three-dimensional vapor-permeable network is constructed, diffusion and discharge of water vapor are accelerated, liquid water is further blocked, and dynamic balance of waterproofness and breathability is realized.

The invention discloses a solid electrolyte composite diaphragm, a preparation method thereof and a negative-electrode-free sodium ion battery. The solid electrolyte composite diaphragm comprises a positive electrode side composite diaphragm and a negative electrode side composite diaphragm which are compounded with each other, the positive electrode side composite diaphragm comprises a first polymer matrix, metal organic framework material particles and sodium super-ion conductor type nano solid electrolyte particles, and the negative electrode side composite diaphragm comprises a second polymer matrix, sodium-philic particles and a high-conductivity material; the nano-pores of the solid particles in the two diaphragms are adsorbed with pre-dissolved electrolyte, and the composite contact area of the two diaphragms is provided with a binding area in which polymer matrixes are mutually diffused and cross-linked. A large amount of liquid electrolyte is absorbed and stored through the nanopores, so that the reaction of high-activity sodium metal and the liquid electrolyte at a negative electrode interface is inhibited, the generation of gas is avoided, the loss of active sodium and the electrolyte is reduced, and the coulombic efficiency of the battery is improved; the sodium-philic sites on the negative electrode side reduce the nucleation overpotential of sodium and promote uniform and stable deposition of sodium on the negative electrode.

Described herein are a method (100) and a system (200) for the generation of a high concentration of nanobubbles by hydrostatic cavitation within a pressurised liquid. The method (100) includes: - applying a substantially transverse pressure (102) to a nanoporous conduit containing a liquid to compress the conduit and pressurise the liquid; wherein the compression is configured to force the liquid (104) within the nanoporous conduit into a plurality of connected nanopores within the inner surface of the nanoporous conduit; and - releasing (106) the substantially transverse pressure from the nanoporous conduit and depressurising the liquid to generate nanobubbles via hydrostatic cavitation within the liquid. The system (200) includes a reservoir (202) configured to store a liquid, a conduit (204) and a constriction device (206), preferably a peristaltic pump, configured to exert a substantially transverse pressure to the conduit (204) in order to pressurise the liquid within the conduit (204).

The application relates to a nanofiber membrane and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing polyurethane, nano lanthanum oxide, a waterproof agent and a solvent to obtain a spinning solution; (2) preparing an electrostatic spinning membrane through electrostatic spinning of the spinning solution; (3) spraying a finishing liquid on the electrostatic spinning membrane, and then performing heating treatment to obtain the nanofiber membrane. The polyurethane is stretched into superfine fibers through the electrostatic spinning technology, and a superhigh porous membrane similar to a spider web is prepared, the porous membrane has billions of nanoholes per square centimeter of the membrane, the nanofiber membrane has high air permeability and waterproof and moisture permeability, and the fibers are bound through a fiber bonding point technology, so that the fabric has excellent washing resistance. The nano lanthanum oxide heating functional particles are added to endow the nanofiber membrane with heating and heat storage functions, and further improve the washing resistance of the fabric.

The invention discloses a micro-nano composite bi-pass aluminum oxide film with heterogeneous wettability as well as a preparation method and application of the micro-nano composite bi-pass aluminum oxide film. The preparation method comprises the following steps: carrying out single-side protection on a super-amphiphilic micro-nano composite aluminum oxide film, and then removing the aluminum oxide film on the unprotected side; etching to remove the unreacted aluminum substrate and aluminum oxide barrier layer to obtain a bi-pass aluminum oxide film; then hydroxylation modification is carried out to obtain a hydroxylated alumina membrane, and finally interface wettability adjustment is carried out to prepare the heterogeneous wettability micro-nano composite bi-pass alumina membrane. The prepared micro-nano composite bi-pass aluminum oxide film has a self-assembled micron hole in one side, a three-dimensional interpenetrating nano hole in a bulk phase and a nano hole structure in the other side, and the intrinsic wettability of the micro-nano composite bi-pass aluminum oxide film is a super-amphiphilic interface. And finally, accurate wettability regulation and control and heterogeneous wettability construction are realized through chemical and physical wettability modification strategies, the super-amphiphilic through-hole aluminum oxide can be changed into a Janus aluminum oxide film, and the film has an asymmetric conical structure gradient.

The invention discloses an array flexible tactile sensor packaging layer micro-nano manufacturing method and device, and the method comprises the steps: obtaining a performance demand of a packaging layer, and selecting a packaging material of the packaging layer according to the performance demand; forming a packaging substrate based on the packaging material, coating the packaging substrate to form a pre-packaging layer, and constructing a nano-pore structure on the pre-packaging layer; and curing the nano-pore structure, aligning the cured nano-pore structure to a sensing unit of the arrayed flexible tactile sensor by using a micro-nano precise alignment device, recording an alignment position, and fixing the packaging layer on the arrayed flexible tactile sensor according to the alignment position. By preparing the packaging layer with the nano-pore structure, external impurities and interference can be effectively blocked, gas and heat exchange between the sensor and the external environment can be ensured, and the normal working performance of the sensor is maintained.

In alternative embodiments, provided are combined magnetic tweezer-nanopore devices for combined magnetic tweezer-nanopore sequencing of polymers, and to prepare polymers for combined magnetic tweezer-nanopore sequencing. In alternative embodiments, provided are nanopore polymer sequencing systems comprising: a chip comprising a substrate, a layer disposed on the substrate, a sensor site disposed in the layer, an electrode disposed at the sensor site, an amplifier in connection with the electrode; a membrane disposed over the layer at the sensor site, and a nanopore disposed in the membrane, a magnet disposed in a cis position relative to the nanopore; and, a circuit comprising the electrode and a reference electrode, an amplifier in connection with the electrode and the reference electrode, a data acquisition (DAQ) system in connection with the amplifier, a bias module in connection with the amplifier, and a control module in connection with the bias module and the DAQ system.

The invention belongs to the technical field of 3D printing concrete materials, and particularly relates to 3D printing waste glass recycled lightweight aggregate concrete and a preparation method thereof. The concrete is prepared from the following raw materials: cement, silica fume, fine aggregate, waste glass recycled lightweight aggregate, a viscosity modifier, nano silicon dioxide, nano cellulose fibers, a water reducing agent, fly ash, a defoaming agent and water. The lightweight 3D printing concrete with different densities is prepared by replacing sand with the lightweight aggregate prepared by recycling the waste glass, the tackifier, the thixotropic agent, the nano-crystalline cellulose fiber, the water reducer and the fly ash are used for competitive synergistic effect to improve the water-retaining property and the rheological property, a nano-micron multi-scale synergistic system is constructed, multi-stage particle accumulation is effectively realized, and the 3D printing concrete with different densities is prepared. The problems that the constructability is difficult to improve while the density of conventional 3D printing lightweight aggregate concrete is reduced and the lightweight aggregate of low-density 3D printing concrete floats upwards are solved, the printable window time is prolonged, and the interface performance of an aggregate matrix is enhanced.

The invention discloses a graphite material and a preparation method thereof, an electrode and a lithium ion battery, and relates to the field of lithium ion batteries. Aerosol is adopted to assist vapor deposition, so that the loading uniformity of the nano-metal catalyst is improved, the particle size of the nano-metal is inhibited from growing, and the cost of raw materials is relatively low; nanopores are formed in the graphite basal plane through micro-etching, so that lithium embedding channels on the graphite surface are increased, the diffusion path of Li < + > in a graphite bulk phase is reduced, and the rapid charging performance of graphite is improved; a nano transition metal catalyst is deposited on the surface of graphite, so that efficient fixed-point etching is realized, and the pore-forming proportion of a graphite basal plane is increased; due to the existence of the nano-catalyst, the depth-diameter ratio of pores after gas phase etching is increased, and a lithium embedding channel of a single pore is increased; the lithium intercalation channels on the graphite surface are increased through micro-etching, the Li < + > diffusion path is reduced, and the fast charging and high power performance of the graphite material is remarkably improved.

The application provides a kind of bicomponent super-hydrophilic fiber of skin-core structure and its preparation method, belongs to the field of composite fiber preparation, non-water-soluble PET is used as core layer material, nano SiO2 is uniformly mixed with water-soluble PET as skin layer material, and SiO2 / PET fiber of skin-core structure is prepared by melt spinning;Then, SiO2 / PET fiber is soaked in 80-95 DEG C hot water, is treated for 4-6 h by using three-stage gradient temperature control process, to dissolve water-soluble PET in skin layer, obtain bicomponent super-hydrophilic fiber.The bicomponent super-hydrophilic fiber provided in the application adopts skin-core structure, the skin layer is hydrophilic phase, the surface has a plurality of nanopores with pore size of 80-250 nm, bosses with height of 10-50 nm, pore depth is 1-3 um, and the overall open porosity is 30-65%, which ensures the exposure of hydrophilic nanoparticles (SiO2), the static water contact angle is ≤5° (completely wet within 2 s), has excellent super-hydrophilic and rapid moisture conducting performance, and maintains good mechanical strength and washing resistance.

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.

Despite the existence and deployment of a range of antimicrobial / disinfectant / sterilization technologies and products, transmission of infectious diseases remains a significant problem worldwide, continuing to cause hundreds of millions of infections and millions of deaths every year of both human beings and animals. State-of-the-art technologies suffer from several disadvantages including being discrete in space and time, being overly dependent on human skill and discipline, and in some cases having harmful side-effects to human health. This invention proposes a series of industrial grade antimicrobial product designs, and materials and methods to make them highly effective products that offer continuous antimicrobial action, with minimum dependence on human discipline and skill once deployed, and with no harmful side-effects. Methods may include either or both first and second materials be formed by vapor or solution-based coating schemes and many may be antimicrobial in nature. Nanopores and / or nanotubes produce an ultra-high anti-microbially active surface area.

The present application provides a lightweight nanoporous diamond and a preparation method thereof, the preparation method comprising: subjecting a carbon source and a metal to high temperature and high pressure treatment to convert the carbon source into diamond, then cooling and depressurizing the carbon source to room temperature and pressure to obtain a composite material of diamond and metal; soaking the composite material in an inorganic solvent to remove the metal, thereby obtaining a lightweight nanoporous diamond. The preparation method of the lightweight nanoporous diamond provided in the present application can achieve the regulation of the pore size, porosity and density of the lightweight nanoporous diamond, thereby obtaining a lightweight nanoporous diamond with a low pore size, high porosity and low density. At the same time, the obtained lightweight nanoporous diamond also has high hardness and good mechanical strength. In addition, the preparation method provided is simple and easy to operate, which is conducive to the mass production of lightweight nanoporous diamonds.

The present application relates to the field of molecular sieve preparation, and discloses a modification method of titanium silicalite molecular sieve, which comprises the following steps: 1) mixing titanium silicalite molecular sieve, a modifier and water to obtain a mixture; 2) performing hydrothermal modification treatment on the mixture to obtain a hydrothermal modification treatment product; 3) performing solid-liquid separation on the hydrothermal modification treatment product to obtain a solid phase and a liquid phase; 4) performing washing, drying and first calcination on the solid phase to obtain modified titanium silicalite molecular sieve; and 5) contacting the liquid phase and / or washing liquid obtained by washing with nanopore material, wherein the specific surface area and pore size of the nanopore material are larger than those of the modified titanium silicalite molecular sieve. The method provided by the present application can greatly reduce the COD value of waste liquid generated in the modification process of titanium silicalite molecular sieve, and the modified titanium silicalite molecular sieve obtained by the method has excellent catalytic performance.