41results about How to "Good charge storage performance" patented technology

There is provided an information storage apparatus including recording medium and a head. The recording medium has an electrode layer, a magnetic layer that is stacked on the electrode layer, and a wear-resistant thin film that is stacked on the magnetic layer. The head has a conductive probe for injecting charge to record information and sensing the charge injected into the recording medium to reproduce information in a state that the conductive probe contacts the recording medium. A magnetic medium, which is coated with a wear-resistant thin film, stores charges to record information and reproduce information using an electrostatic force. Thus, it is possible to stably store highly integrated information. Also, a probe contacts a recording medium to record and reproduce information at a high speed. Thus, sensitivity and resolution can be improved.

The invention discloses a polypropylene electret air filtering material containing graphene oxide. The polypropylene electret air filtering material comprises, by weight parts, 50-60 parts of polypropylene, 6-10 parts of silicon monoxide, 8-14 parts of powdered activated carbon, 1-4 parts of aminopropyl triethoxy silane coupling agent, 0.6-1.4 parts of glacial acetic acid, an appropriate amount of deionized water, 1-3 parts of low density polyethylene wax, 0.8-2 parts of antioxidant 1010, 0.7-1.4 parts of titanate coupling agent, 4-7 parts of graphene oxide, an appropriate amount of N,N-dimethylformamide, 0.7-1.5 parts of toluene diisocyanate, 0.8-1.6 parts of dibutyltin dilaurate and an appropriate amount of acetone. Silicon nanowires containing alpha-quartz are prepared, the silicon nanowires loaded by activated carbon and treated through the silane coupling agent are added into a melt-blown polypropylene electret material, the adsorption of harmful substances in air by the filtering material is effectively improved, and the filtering material has excellent filtering efficiency.

The present invention relates to a preparation process of a phosphorus-and-nitrogen-doped graphene porous carbon composite material. The preparation process comprises the following steps: (1) hydrothermal reaction: dissolving a nitrogen source into deionized water, adding a graphene oxide solution and performing ultrasound for a pre-set time, adding a phosphorus source and performing ultrasound for a pre-set time to obtain a mixed solution, and then transferring the mixed solution to a high pressure reactor and performing the hydrothermal reaction to obtain a hydrogel, wherein the nitrogen source is one or more of aromatic polyamines, and the phosphorus source is phosphoric acid or phosphate; (2) oxidative polymerization: adding the hydrogel in step (1) into a ferric chloride solution after the hydrogel is cooled, and sealing and standing the mixed solution under a predetermined temperature for a pre-set time to obtain a composite hydrogel; and (3) carbonization activation. The preparation method has the advantages of simplicity, low cost and high production efficiency, no pollutants generate, and the prepared phosphorus-and-nitrogen-doped graphene porous carbon composite materialhas excellent specific capacitance value, high cycle stability, high energy density and excellent electrochemical performance when the material is applied to super capacitor electrodes.

The present invention discloses a nano-fiber thin-membrane filter material preparation method and a product thereof. The method comprises the following steps: an organic piezoelectric material or an organic electrostatic adsorption material is used as a matrix material; the matrix material is mixed with an inorganic piezoelectric material or an electrostatic adsorption nano-material and a solvent;stirring at a preset temperature is used to dissolve the organic piezoelectric material or the organic electrostatic adsorption material, so that the inorganic piezoelectric material or electrostaticadsorption nano-material is uniformly dispersed to obtain a spinning solution having a viscosity; an electrostatic spinning method is used to obtain the spinning solution for spinning; a substrate isused to receive electrostatic-spun nano-fibers to form a nano-fiber thin membrane; and the nano-fiber thin membrane is subjected to annealing, polarizing, cutting, and material repolarizing to obtainthe nano-fiber thin-membrane filter material. Compared with traditional electrostatic adsorption materials, the nano-fiber thin-membrane filter material has stronger adsorption force on impurities and particles under high flow speed and high wind speed scenes, has better filtering effects, and is suitable for air purification, anti-fog masks, industrial exhaust gas, automobile exhaust gas treatment and other high-flow-speed scenes.

The invention discloses a polytetrafluoroethylene-polypropylene composite electret air filtering material and a preparation method thereof. The polytetrafluoroethylene-polypropylene composite electret air filtering material comprises, by weight, 40-50 parts of polypropylene, 20-30 parts of polytetrafluoroethylene suspended fine powder, 7-13 parts of silicon monoxide, 11-17 parts of powdered activated carbon, 2-4 parts of 3-aminopropyl triethoxy silane coupling agent, 0.6-1.7 parts of glacial acetic acid, an appropriate amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.8-2 parts of antioxidants 1010, 0.8-1.5 parts of titanate coupling agent and 1-3 parts of sodium chloride. Silicon nano-wires containing alpha-quartz are prepared and added into melt-blown polypropylene electret materials, the air filtering material has quite high electret charge stability and excellent filtering efficiency, the activated carbon is used for loading the silicon nano-wires treated by the silane coupling agent, the loading capacity of the activated carbon for the silicon nano-wires is improved, and adsorption of the filtering material for harmful substances in air is effectively improved.

The invention provides a method for manufacturing a shape-controllable double-function hydrogel anode material for a hybrid biological power source. According to the method, the hydrogel anode material is prepared by chitosan, carbon nanotube and polypyrrole, the hydrogel anode material can be taken as an anode material for the hybrid biological power source, so not only can biological electrons be generated, but also the biological electrons can be further stored, the hybrid biological power source has double functions of a microbiological fuel cell and a biological capacitor, the hydrogel three-dimensional material has open transparent large-hole structure through which mass transfer and attachment of microbes in the holes are facilitated, electrode biological compatibility is substantially improved through the chitosan, biomembranes are easy to hang, microbe attachment amount is enhanced, conductivity and electron storage capability are improved through CNT and polypyrrole, anode biological electrocatalytic activity and electron storage can be improved, and cell instantaneous output power is improved. The method is advantaged in that the process is simple, self-supporting can berealized to form multiple shapes, and the method has wide application prospects in actual applications.

A nonaqueous electrolyte secondary battery includes a flat winding electrode assembly including a positive electrode substrate exposed portion on one end and a negative electrode substrate exposed portion on the other end. The winding numbers of the positive and the negative electrode substrate exposed portions are each 30 or more. The positive and negative electrode substrate exposed portions each have an outermost surface welded and connected with a positive and a negative electrode collectors, respectively. A nonaqueous electrolyte used to fabricate the battery contains a lithium salt having an oxalate complex as an anion. At the welded connection portions, all of the layers of the positive electrode substrate exposed portion are melted to be welded and connected to the positive electrode collector, and all of the layers of the negative electrode substrate exposed portion are melted to be welded and connected to the negative electrode collector.

The invention provides a preparation method of a NiCo2O4@Ni-Co LDH composite electrode for an all-solid-state flexible supercapacitor, which comprises the following steps: (1) mixing NiCl2. 6H2O, CoCl2. 6H2O, urea and deionized water according to the mass ratio of 1:2:5:20, and slowly adding NH4F; (2) putting the carbon cloth into the solution, carrying out heat preservation, and carrying out furnace cooling to room temperature; (3) taking out the carbon cloth, cleaning, and carrying out annealing treatment; (4) uniformly mixing Ni(NO3)2.6H2O, Co(NO3)2.6H2O and NH4F according to the mass ratioof 4:1:2.8; and (5) obtaining a NiCo2O4@Ni-Co LDH / CFC electrode material by using an electro-deposition method, taking out the NiCo2O4@Ni-Co LDH / CFC electrode material, sequentially cleaning the NiCo2O4@Ni-Co LDH / CFC electrode material by using deionized water and absolute ethyl alcohol, and drying the NiCo2O4@Ni-Co LDH / CFC electrode material. The all-solid-state flexible supercapacitor not onlyhas good charge storage capacity and ion diffusion capacity, but also has good cycling stability, the preparation method is simple, and the product has good electrochemical performance.

The invention discloses a dendritic electrostatic spinning / electret composite nanofiber membrane filter material. The material is composed of the following raw materials of, by weight, 75 to 90 parts of polythioetherimide, 7 to 13 parts of silicon monoxide, 10 to 16 parts of powdered activated carbon, 2 to 3 parts of a 3-aminopropyltriethoxysilane coupling agent, 0.8 to 2 parts of glacial acetic acid, a proper amount of deionized water, 4 to 7 parts of metatitanic acid, a proper amount of a 0.6 mol / L AgNO3 solution, a proper amount of N-methyl pyrrolidone, 0.5 to 2 parts of dibutyl phthalate and 1 to 3 parts of tetra-n-propylammonium chloride. Silicon nanowires containing alpha-quartz are prepared, the electrostatic spinning / electret composite fiber filter material is prepared through the electrostatic spinning technique and has the excellent electric charge storage performance, and the filter efficiency of the filter material is greatly improved. In addition, nano-silver is added, nano-titanium dioxide is loaded, the antibacterial endurance property of the filter material is improved, and the long-time high-efficiency filter effect is achieved.

The invention discloses a preparation method of a nanometer nickel protoxide-nickel-silicon alloy lithium ion battery negative electrode material and belongs to the technical field of preparing lithium ion battery electrode material. The feature of the lithium battery negative electrode material is that the lithium battery negative electrode material has a highly-ordered micro-nano silicon micro-channel substrate, and an excellent conductive NiSi layer electric charge collecting layer, and a NiO nanometer active layer has large specific surface area and an electrode orderly porous channel is suitable for an electrolyte solution to immerge. The preparation method of the battery cathode material is highly compatible with a traditional integrated circuit manufacturing process, and mainly comprises three main processes of etching to form the highly-ordered micro-nano silicon micro-channel substrate by using a photoinduced low temperature electrochemical pulse voltage wet method, depositing metallic nickel via an electroless plating process and rapid thermal annealing and oxidizing. The highly-ordered three-dimensional micro-nano porous NiO / Si-MCP (nickel protoxide / silicon microchannel) negative electrode material has excellent physical and electrochemical support for immerging the electrolyte, transporting charges and embedding and de-embedding lithium ions, and could be used for preparing the integratable lithium ion battery electrode material.

The invention provides a flexible super capacitor electrode which includes graphene paper and three-dimensional porous graphene compounded on the graphene paper. The graphene paper and the three-dimensional porous graphene are closely compounded to prepare a flexible super capacitor electrode. The graphene paper is mainly used for serving as an electrode current collector and giving the electrode good mechanical property. The three-dimensional porous graphene, which has a pore structure, a large specific surface area and good ion diffusion and charge storage abilities, gives the electrode excellent capacitance characteristic. By combining the advantages of the two different graphene structures in electrode mechanical property and energy storage, a high-performance flexible electrode with good mechanical property is obtained.

The invention provides a storage operation circuit module and a processor, the storage operation circuit module comprises a plurality of storage operation units arranged in an array, and each storageoperation unit is connected to a word line and a bit line; the storage operation unit comprises a storage unit, a first switching device and a second switching device, a first end of the first switching device is connected to a complementary signal end of the storage unit, and a first end of the second switching device is connected to an output signal end of the storage unit; the second end of thefirst switching device is connected to the first end of the third switching device, the second end of the second switching device is connected to the first end of the third switching device, and thefirst end of the third switching device is connected with a charge storage unit; and the first switching device and the second switching device are both switched on or off according to the operation data signal. The processor comprises a calculation unit and the storage operation circuit module. According to the invention, data operation can be realized in the memory, and the data processing speedof the processor is improved.

The invention discloses a gelatin / polyetherimide compound electret fiber filtration material prepared through electrostatic spinning. The gelatin / polyetherimide compound electret fiber filtration material is prepared from, by weight, 65-80 parts of polyetherimide, 10-18 parts of gelatin, 6-11 parts of silicon oxide, 9-16 parts of powdery activated carbon, 1-3 parts of 3-aminopropyl triethoxy silane coupling agent, 0.8-2 parts of glacial acetic acid, a proper amount of ionized water, 3-6 parts of metatitanic acid, 0.6 mol / L AgNO3 solution, a proper amount of N-methylpyrrolidone and 0.8-2 parts of acetic acid. Alpha-quartz-containing silicon nanowires are prepared by adopting the material, the gelatin / polyetherimide compound electret fiber filtration material is prepared through an electrostatic spinning technology and has excellent charge storage stability, and the filtering efficiency of the filtration material is greatly improved. In addition, nano silver is added and nano titanium dioxide is loaded to improve the antimicrobial persistence performance of the filtration material and to achieve a long-term and efficient filtration effect.

The invention relates to a method for improving the performance of a single-layer polysilicon gate nonvolatile memory. By changing the materials of an SAB (Salicide-Block) layer, the number of positive movable ions entering the floating gate of a single-layer polysilicon gate nonvolatile memory unit can be decreased, so the charge retention of a storage unit is enhanced.

The invention discloses a high-temperature-resistant melt-blown polypropylene compound electret air filtration material. The high-temperature-resistant melt-blown polypropylene compound electret air filtration material is prepared from, by weight, 50-60 parts of polypropylene, 9-13 parts of silicon monoxide, 12-17 parts of powdery activated carbon, 2-6 parts of 3-aminopropyl triethoxy silane coupling agent, 0.5-2 parts of glacial acetic acid, a proper amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.8-1.7 parts of antioxidant 1010, 0.7-1.3 parts of titanate coupling agent, 4-7 parts of silicon dioxide, 2-4 parts of boric acid and 1-4 parts of barium oxide. Silicon nanowires containing alpha-quartz are prepared and are added to the melt-blown polypropylene compound electret material, the material has excellent filtration efficiency and further has an obvious bacterial reproduction inhibiting function. The activated carbon supported silicon nanowires treated by the silane coupling agent are used, the silicon nanowire supporting capability of activated carbon is improved, and the adsorption capability of the filtration material to the harmful substances in the air is improved effectively.

The invention discloses a polypropylene electret air filtering material with flame retardant performance. The material is prepared from, by weight, 50-60 parts of polypropylene, 9-15 parts of silicon monoxide, 12-18 parts of powdered activated carbon, 1-4 parts of 3-aminopropyl triethoxy silane coupling agent, 0.8-1.6 parts of glacial acetic acid, a proper amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.5-1.8 parts of antioxidant, 0.8-1.5 parts of titanate coupling agent, 1-3 parts of antimonous oxide, 0.8-2 parts of zinc borate and 2-4 parts of decabrominated dipheny ethane. Prepared silicon nanowires containing alpha-quartz are added to the melt-blowing polypropylene electret material, and outstanding filtering efficiency is achieved; according to the silicon nanowires loaded by the activated carbon and processed through the silane coupling agent, the loading amount of the silicon nanowires by the activated carbon is improved, and the adsorption of the filtering material to harmful substances in air is effectively improved.

The invention discloses a preparation method of a porous sponge-like carbon-based Li3VO4 / g-C3N4 / MoXC nanoelectrode material. The method comprises dissolving lithium acetate, ammonium vanadate and citric acid in deionized water, and perforing stirring and clarification in a 40- 55 DEG C water bath condition, then adding that mixed solution of acetic acid containing PVP and ethanol, stirring to homogeneity and transparency; Then adding a small amount of g-C3N4 power, strongly stirring until uniformly disper to obtain a spinning solution; Electrospinning was carried out, precursor fibers were collected, and the resulting product was calcinated at 400-500 DEG C, puting the product into phosphomolybdic acid solution for impregnation, and then put the product into tubular furnace to be heated at700-1000 DEG C for 4-6 hours. The electrode is porous, and the active specific surface area of the electrode for electrochemical reaction is greatly increased, so that the real current density of theelectrode is greatly reduced, so that the energy loss of the battery is greatly reduced, and the performance of the battery is significantly improved.

The invention belongs to the technical field of non-woven materials, and particularly relates to a process for producing a melt-blown material. The melt-blown material comprises a modified polypropylene fiber base material endowed with antibacterial performance through modification with nano silver and nano titanium dioxide and polytetrafluoroethylene ultrafine powder, and the weight ratio of thepolytetrafluoroethylene ultrafine powder to the polypropylene fiber base material is 1:800-1200. The melt-blown cloth prepared from the melt-blown material produced by the process for producing the melt-blown material has relatively good antibacterial performance and relatively good electrostatic charge storage capacity.

The invention discloses an electrostatic spun / electret composite fiber filter material comprising sodium tartrate intercalated hydrotalcite. The filter material is prepared from components in parts by weight as follows: 75-90 parts of polyetherimide, 6-12 parts of silicon monoxide, 9-15 parts of powdered activated carbon, 1-3 parts of a 3-aminopropyl triethoxy silane coupling agent, 0.8-2 parts of glacial acetic acid, a proper amount of deionized water, 3-6 parts of metatitanic acid, a proper quantity of 0.6 mol / L of an AgNO3 solution, a proper amount of N-methylpyrrolidinone, 1-2 parts of sodium tartrate, 7-14 parts of a 4.0 M magnesium chloride aqueous solution, 7-14 parts of a 1.0 M aluminum chloride aqueous solution and a proper quantity of a 20% NaOH solution. Silicon nanowires containing alpha-quartz are prepared, the electrostatic spun / electret composite fiber filter material is prepared with the electrostatic spinning technology and has excellent charge storage stability, and the filter efficiency of the filter material is greatly improved; besides, nano silver is added to support nano titanium dioxide, and the antibacterial endurance property of the filter material is improved.

The invention discloses a method for preparing three-dimensional graphene by adopting ethyl cellulose as the raw material. The method comprises the steps that analytically pure ethyl cellulose and NaOH are dissolved in ethyl alcohol according to the molar ratio of 1 to 1-3 to form sol, aging is conducted on the obtained sol for 12 h to obtain gel, and the gel is dried at 80 DEG C for 6 h to obtain dried gel; carbonization is conducted on the obtained dried gel in an argon atmosphere at the temperature ranging from 700 DEG C to 1000 DEG C, a carbonized product is washed through deionized water till PH of a solution ranges from 6.8 to 7.2, suction filtration is conducted on the solution, a product is obtained, the product is dried for 5 h at 60 DEG C, and the product three-dimensional graphene is obtained. The method for preparing the three-dimensional graphene takes the ethyl cellulose as the raw material, the three-dimensional graphene is prepared by adopting a sol-gel method, the raw material of the reaction is easy to obtain, the cost is low, process equipment is simple, and energy consumption is low.

The invention discloses a vinyl polysiloxane-containing electrostatic spinning and electret composite fiber filter material. The material is prepared from 30-45 parts of polyetherimide, 45-55 parts of vinyl polysiloxane, 6-10 parts of silicon monoxide, 8-15 parts of powdered activated carbon, 1-2 parts of 3-aminopropyltriethoxysilane coupling reagent, 0.8-2 parts of glacial acetic acid, a proper amount of deionized water, 2-6 parts of metatitanic acid, a proper amount of 0.6 mol / L of AgNO3 solution, a proper amount of N-methyl pyrrolidone, 0.5-1 part of sodium chloride and 15-30 parts of methylbenzene. Alpha-quartz-containing silicon nanowires are prepared, and the electrostatic spinning and electret composite fiber filter material is prepared by the electrostatic spinning technology; the filter material has the advantages of being small in aperture, high in poriness, low in air friction and the like, has excellent charge storage stability performance, and improves the filter efficiency of the filter material; the antibacterial durability of the filter material is improved and a long-term efficient filtration effect is achieved.

A nonaqueous electrolyte secondary battery includes a flat winding electrode assembly including a positive electrode substrate exposed portion on one end and a negative electrode substrate exposed portion on the other end. The winding numbers of the positive and the negative electrode substrate exposed portions are each 30 or more. The positive and negative electrode substrate exposed portions each have an outermost surface welded and connected with a positive and a negative electrode collectors, respectively. A nonaqueous electrolyte used to fabricate the battery contains a lithium salt having an oxalate complex as an anion. At the welded connection portions, all of the layers of the positive electrode substrate exposed portion are melted to be welded and connected to the positive electrode collector, and all of the layers of the negative electrode substrate exposed portion are melted to be welded and connected to the negative electrode collector.

The invention discloses a polypropylene electret air filter material containing tencel fiber. The material is prepared from, by weight, 50-60 parts of polypropylene, 9-13 parts of silicon monoxide, 11-17 parts of powdered activated carbon, 2-4 parts of 3-aminopropyl triethoxy silane coupling agent, 0.7-1.6 parts of glacial acetic acid, a proper amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.5-2 parts of antioxidant 1010, 0.8-1.5 parts of coupling agent of organic titanate, 5-10 parts of tencel fiber and a proper amount of 50% sodium hydroxide solution. Silicon nanowires containing alpha-quartz are prepared and added to the melt-blow polypropylene electret air filter material, and outstanding filtering efficiency is achieved; the silicon nanowires processed by the silane coupling agent are loaded on activated carbon, the loading capacity of activated carbon for the silicon nanowires is improved, the adsorption of the filtering material to harmful substances in air is effectively improved, and the product has excellent filtering performance.

The invention discloses a durable and anti-ageing polypropylene electret air filtering material. The durable and anti-ageing polypropylene electret air filtering material is prepared from the following raw material components in parts by weight: 50-60 parts of polypropylene, 9-13 parts of silicon monoxide, 10-15 parts of powdered active carbon, 2-5 parts of 3-aminopropyltriethoxysilane coupling agent, 0.5-1.3 parts of glacial acetic acid, a proper amount of de-ionized water, 1-3 part of low density polyethylene wax, 0.5-2 parts of an antioxidant 1010, 0.8-1.5 part of a titanate coupling agent, 0.2-0.6 part of an ultraviolet absorbent and 0.4-0.8 part of a light stabilizer. According to the durable and anti-ageing polypropylene electret air filtering material, a silicon nano-wire containing alpha-quartz is prepared and is added into a melt-blown polypropylene electret material, so that the material has extremely high electret charge stability and excellent filtering efficiency; the active carbon is used for loading the silicon nano-wire treated by the titanate coupling agent, so that the loading amount of the silicon nano-wire on the active carbon is improved; the adsorption of harmful substances in the air by the filtering material is effectively improved.

The invention provides a polypropylene melt-blown non-woven fabric based on composite antibacterial electret master batches and a preparation method. The preparation method comprises the following steps of S1, fully mixing polypropylene wax grafted maleic anhydride master batches, polyhexamethylene guanidine hydrochloride and conventional polypropylene master batches, and performing extrusion granulation treatment to obtain polypropylene wax grafted polyhexamethylene guanidine hydrochloride antibacterial master batches; S2, washing and drying the antibacterial master batches, immersing the antibacterial master batches in a silane coupling agent mixed solution, performing stirring, adding nanoscale silicon dioxide into the mixed solution, and performing full stirring, drying and curing to prepare the composite antibacterial electret master batches; and S3, after the composite antibacterial electret master batches and melt-blown polypropylene are fully mixed, performing melt-blow weaving treatment, and then performing corona discharge treatment to prepare the polypropylene melt-blown non-woven fabric based on the composite antibacterial electret master batches. The polypropylene melt-blown non-woven fabric prepared by the preparation method disclosed by the invention has high-efficiency and low-resistance performance and also has an excellent antibacterial effect.

The invention discloses a low-cost and environment-friendly type meltblown polypropylene electret air filter material. The low-cost and environment-friendly type meltblown polypropylene electret air filter material comprises raw material components in parts by weight as follows: 50-60 parts of polypropylene, 9-16 parts of silicon monoxide, 11-17 parts of powdered activated carbon, 1-4 parts of a 3-aminopropyltriethoxysilane coupling agent, 0.6-1.3 parts of glacial acetic acid, a proper amount of deionized water, 1-2.5 parts of low-density polyethylene wax, 0.5-2 parts of antioxidant 1010, 0.7-1.4 parts of a titanate coupling agent, 2-5 parts of peanut hulls, 3-5 parts of zeolite powder, a proper amount of petroleum ether and a proper amount of absolute ethyl alcohol. Silicon nanowires containing alpha-quartz are prepared and added to a meltblown polypropylene electret material, so that the material has excellent filter efficiency and a bacterial reproduction inhibiting function; the silicon nanowires treated with the silane coupling agent are supported by the activated carbon, the silicon nanowire supporting quantity of the activated carbon is increased, and the adsorption of hazardous substances in the air by the filter material is improved effectively.

The invention discloses a washing-resistant polypropylene hybridized electret air filter material. The material is prepared from, by weight, 50-60 parts of polypropylene, 8-12 parts of silicon monoxide, 10-16 parts of powdered activated carbon, 2-5 parts of 3-aminopropyl triethoxy silane coupling agent, 0.5-1.5 parts of glacial acetic acid, an appropriate amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.5-2 parts of an antioxidant 1010, 0.8-1.5 parts of a titanate coupling agent, 1-2 parts of TMP-2000 and 3-6 parts of chopped glass fibers. By addition of alpha-quartz containing silicon nanowires into a melt-blown polypropylene electret material, remarkable filter efficiency is achieved, and an evident bacterial reproduction inhibiting function is realized. By adoption of activated carbon for loading the silicon nanowires treated by the silane coupling agent, silicon nanowire load capacity of the activated carbon is increased, and adsorption of the filter material to harmful substances in air can be effectively improved.

The invention relates to the field of catalysts, in particular to a photocatalyst and a preparation method and application thereof. The photocatalyst is formed by loading protonated crystal g-C3N4 on acidified carbon nanofibers in an electrostatic self-assembly manner, and the loading capacity of the acidified carbon nanofibers is 0.5-5%. The protonated crystal g-C3N4 can effectively reduce the recombination center of carriers, improve the interface transfer of charges and increase active sites of reaction, the acidified carbon nanofibers can improve the transfer of the carriers and can effectively avoid agglomeration of the one-dimensional nanorod structure of the crystal g-C3N4, and under light illumination, the one-dimensional nanorod structure of the crystal g-C3N4 can be converted into the one-dimensional nanorod structure of the crystal g-C3N4. Electrons and electron hole pairs excited from a valence band to a conduction band are firstly generated in g-C3N4, and the electrons can be transferred from the g-C3N4 to the carbon fiber and stored due to excellent conductivity and charge storage capability of the carbon fiber, so that the catalyst has relatively high catalytic activity.

The invention discloses a long-acting electret air filtration material with anti-corrosion and anti-mildew effects. The long-acting electret air filtration material with the anti-corrosion and anti-mildew effects comprises the following raw material components: 50-60 parts of polypropylene, 7-13 parts of silicon monoxide, 12-15 parts of powdered active carbon, 1-4 parts of a 3-aminopropyltriethoxysilane coupling agent, 0.6-1.4 parts of glacial acetic acid, a proper amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.6-2 parts of an antioxidant 1010, 0.7-1.3 parts of a titanate coupling agent, 4-9 parts of sorbic acid, 5-11 parts of malic acid and 3-6 parts of 8-quinolinol copper. Through the long-acting electret air filtration material with the anti-corrosion and anti-mildew effects, silicon nanowires containing alpha-quartz are prepared and are added into a melt-blown polypropylene electret material, so that the electret material has excellent filtration efficiency and also has a function of obviously inhibiting bacterial reproduction; the silicon nanowires treated by the silane coupling agent are loaded by active carbon; the silicon nanowire loading capacity of the active carbon can be improved; the adsorption of the filtration material to harmful substances in the air can be effectively improved.