1004results about How to "Simple equipment requirements" patented technology

The invention relates to a manufacturing method for nanometer rod film of zinc oxide on fiber product, comprising (1) by sol-gel method ZnO nano-crystal grain is prepared and a great deal of ZnO seed crystal is deposited on the surface of fiber product, molar concentrations of zinc salt and alkaline agent are all 0.001M-0.75M; (2) by hydrothermal method or precipitation of chemical solution pool, nanometer rod film of zinc oxide grows on fiber product, molar concentrations of zinc salt solution and complexing agent solution are all 0.001M-0.05M; ZnO nanometer rod film with equal surface and good directivity is obtained. The manufacturing method is provided with simple method and low cost. It is suitable for industrial production.

The invention belongs to the technical field of material preparation and oil chemical engineering, and in particular discloses a preparation method for a mesopore-micropore core-shell composite molecular sieve catalyst. Zeolite particles are dispersed in organic solvent / water mixed solution which contains cationic surfactant and alkali under the action of ultrasound, and then silicon or silicon-aluminum species are introduced into the mixed solution to obtain a mesopore-micropore core-shell composite molecular sieve by solution phase self-assembly and a sol-gel process, wherein micropore zeolite serves as a core, and mesopore silicon oxide or aluminum-containing mesopore silicon oxide serves as a shell layer. The obtained composite molecular sieve has a retained zeolite micropore framework and an ordered two-dimensional hexagonal mesopore structure, a mesopore path is vertical with the surface of the zeolite particles, the path has high openness, the thickness of the mesopore shell layer is adjustable, and after the mesopore shell is packed, the mesopore-micropore can maintain high un-obstruction. The method has the advantages of simple operation, low raw material cost, low equipment requirement and the like.

The invention relates to a method for removing heavy metals in a water body, which is characterized in that common oxidizers for water treatment, such as hydrogen peroxide, sodium hypochlorite, potassium permanganate and the like, are utilized for oxidization to activate the zero-valent iron surface and continuously generate fresh iron (III) / (II) (hydro)oxide and other active components, thereby quickly and efficiently removing heavy metals in the water body, including As, Hg, Cd, Pb, Cr, Se, Sb, Cu, Zn and the like, in a mode of adsorption, precipitation, redox or the like.

A water curing asphalt polyurethane composite waterproof coating mainly comprises a component A and a component B. In terms of mass part, the component A consists of 60-85 parts of polyether polyol, 10-25 parts of isocyanate and 2-10 parts of plasticizer; and the component B consists of 40-70 parts of petroleum asphalt, 5-20 parts of compatilizer, 6-25 parts of plasticizer, 0.5-4 parts of stabilizer, 1-12 parts of water, 25-55 parts of filler, 8-20 parts of calcium hydroxide, 0.1-2 parts of catalyst and the like. When the water curing asphalt polyurethane composite waterproof coating is in use, the component A and the component B are uniformly mixed and the mixture is directly smeared on a waterproof datum plane of a building and is cured to form a waterproof film with the advantages of high strength, high elasticity and favorable low-temperature flexibility. The water curing asphalt polyurethane composite waterproof coating disclosed by the invention is simple in production process, low in cost and free from of tar or any organic solvent, meets the requirement of environment friendliness, is suitable for water resistance, seepage resistance and moisture resistance of construction engineering such as roofs, basements, bridges, tunnels and culverts and is especially suitable for waterproof engineering of damp datum planes.

The invention discloses a car networking accident black spot warning system and method based on an augmented reality and a cloud intelligent decision. The method comprises the steps that car operating data is collected through a vehicle-mounted client system layer, and the collected car operating data is sent to a cloud control center layer through a cellular communication network layer; a data decision package sent back from the cloud control center layer is received and displayed to a driver in an augmented reality mode combined with real road conditions; based on car operating data received in real time and data in a black spot database, the cloud control center layer makes decision analysis according to a car operating state and current traffic and weather conditions and publishes corresponding warning information to the vehicle-mounted client system layer in a data package format. By fusing various dynamic traffic data sources and combining the cloud intelligent decision and the augmented reality, the perceptibility of the driver to various accident risks on a road black spot can be greatly improved, the safety awareness of the driver on a invisible road black spot is enhanced, accordingly the accident rate is reduced, and the road black spot safety is improved.

The invention discloses a method for making a super-high temperature resistant ceramic coating. The method adopts organic polymer as adhesive and mixed powder consisting of high melting metal powder, B powder, C powder and Si powder as raw materials; moreover, through adopting processes such as preparing slurry used in a coating, slurry coating, precoating curing, high-temperature reaction sintering, a super-high temperature resistant ceramic coating is finally made on the surface of a ceramic matrix composite material. The coating making process is simple and has low cost; the made coating has ideal bonding performance with a substrate and has excellent ablation resistance and antioxidation, thereby laying the foundation for the application of a ceramic matrix composite material in the super-high temperature resistant and antioxidation fields.

In the invention, when a service packet needs to be transmitted, the follow steps will be executed: according to the saved and maintained channel usage list, the sending node selects a collision-free service channel; the RTS / CTS packet transmitted on first public channel between the sending node and receiving node realizes the handshake; the sending node transmits the service packet on said selected service channel; after successfully receiving the service packet, the receiving node replays the ACK packet on the second public channel.

The invention discloses a solid electrolyte material for a lithium battery and a preparation method and application of the solid electrolyte material, and belongs to the field of energy material preparation. The solid electrolyte material comprises a metal organic framework compound, a lithium salt, a film-forming additive and a filling. The solid electrolyte material for the lithium battery does not need polyoxyethylene or a derivative thereof; and compared with other inorganic solid electrolytes, the solid electrolyte material has the advantages of higher lithium ion containing capability, higher ionic conductivity and better heat stability, and the security of the battery can be greatly improved. The lithium-ion all-solid-state battery prepared by the method has the electrochemical properties equivalent to a liquid electrolyte. The solid electrolyte material for the lithium battery can be used for a lithium-ion battery, can be suitable for the systems of a lithium-sulfur battery, a lithium-air battery and the like, and is wide in application.

The invention relates to a fly ash floating bead surface modification technology, and specifically relates to a method for carrying out fly ash floating bead surface modification by using a compound silicane coupling agent. First, fly ash is subjected to sintering and acid-alkali pretreatments; and the pretreated fly ash is subjected to a surface modification treatment by using the compound coupling agent. When fly ash is processed through surface modification with the method provided by the invention, physical and chemical properties of obtained surface-modified fly ash floating beads are changed, dispersity of the beads in resin and organic polymers is improved, and compatibility of a filling material with interfaces of substrates such as resin is improved. Further, mechanical properties and other performances of high-molecular materials such as plastic, paint, and rubber are improved. Therefore, an improvement method is provided for better utilization of fly ash, and environment pollution is reduced.

The invention discloses a method for preparing an ABX3 perovskite single crystal film. The method for preparing the ABX3 perovskite single crystal film comprises the following steps: dissolving A-containing halide and a B-containing metallic compound in a solvent M, and ensuring that the mole ratio of the A-contained halide to the B-contained metallic compound is 1:(0.1-2); preparing a perovskite solution with the concentration being 0.05 to 5.0mol / L; dropwise adding the perovskite solution onto a substrate P, and covering the substrate P with a substrate Q; controlling the growth direction of a perovskite single crystal through the substrate P and the substrate Q, so as to ensure that the crystal grows in a gap between the substrate P and the substrate Q, namely to ensure that the perovskite single crystal can grow only in two directions, and forming the perovskite single crystal film with the evaporation of the solvent in the perovskite solution between the two substrates. By adopting the method, a perovskite single crystal film with relatively high quality and relatively large size can be prepared; the method is simple in technology, high in operability and high in repeatability.

The invention discloses a synthetic method for an ordered mesoporous nanocrystal titanium / carbon dioxide composite material with high content of titanium dioxide. Resol with the molecular weight of 200 to 500, triblock copolymer and mixed titanium source form an ordered mesophase in a highly volatile organic solvent system by self assembly induced by solvent volatilization and then the ordered mesoporous nanocrystal titanium / carbon dioxide composite material is obtained after calcination in nitrogen atmosphere. The composite material prepared has ordered pore canal structure, high specific surface which is 100 to 400m<2> / g, large pore volume which is 0.1 to 0.5cm<3> / g and even aperture which is about 2.3 to 5.0nm. The synthetic method overcomes the disadvantages that the specific surface of titanium dioxide is low and the pore canal structure is easy to collapse during the course of crystallization, successfully introduces carbon component to obtain the ordered mesoporous nanocrystal titanium / carbon dioxide composite material and has the advantages of simple synthetic operation, cheap raw material price and low device requirement.

The invention discloses a chemical corrosion detection method of a hot rolling strip steel scale structure, which is characterized by comprising the following steps: (1) adopting a liner cutting method to cut a cross section on hot rolling strip steel, cleaning and removing oil stain on the cross section by ultrasonic wave; (2) adopting a hot inlay method to inlay the hot rolling strip steel in inlaid materials, and enabling the cross section to expose; (3) grinding the cross section with sand paper; (4) polishing the cross section of an inlaid sample by abrasive paste; (5) mixing hydrochloric acid and alcohol to prepare mixed solution, dipping the polished inlaid sample into the mixed solution for corrosion for 4-10 s, taking out the sample, and cleaning by utilizing alcohol to remove acid liquor; and (6) observing the cross section of the inlaid sample by a metalloscope. The method of the invention has simple requirement on equipment, wide applicability and accurate detection result and has significance for controlling steel surface quality in the production process of hot rolling strip steel.

The invention discloses a polylactic acid-based composite material surgical medical film and a preparation method thereof. By adopting electrostatic spinning equipment and exploring proper technological parameters, different types of polylactic acid-based composite material macromolecular fiber thin films are finally formed and are applied to the field of biomedicine. In addition, by regulating and controlling composition of a macromolecular composite material system and thickness of an electro-spinning thin film, the surgical medical film which has good flexibility, high tensile strength, controllable degradation rate as well as excellent waterproof, antibacterial and air permeable performances is obtained finally. The surgical medical film is applicable to the field of various biomedicines such as healing film, wound surface dressing and anti-adhesion medicine; the medical film not only can be better adhered to tissues and avoid biotoxicity, but also can effectively promote transmission functions of blood, nutrients and growth factors in a human body due to the nature of semipermeable membrane. The process of the invention is simple and environment-friendly; the preparation method is easy to operate, low in cost, applicable to large-scale production and good in controllability, and is expected to be widely applied to various medical fields.

The invention relates to a preparation method of copper-zinc-tin-sulfur nano particles, which comprises the following steps: firstly, taking bivalent zinc salts, bivalent tin salts, univalent or bivalent copper salts, and sulfur powder; secondly, mixing the materials taken in the first step, adding oleyl amine, heating and purifying the product to obtain the copper-zinc-tin-sulfur nano-particles.The preparation method is pollution-free green, has mild and simple reaction conditions and low cost, and is suitable for large-scale production.

The invention discloses a method for preparing novel iron-carrying ordered mesoporous carbon materials. Through a soft template route, under the condition of adding no acid additionally, acid produced by iron-salt precursor hydrolysis of a synthesis system is utilized to catalyze phenolic polycondensation, and iron-salt precursors and phenolic polycondensation products are self-assembled around surfactant and are carbonized in inert atmosphere so as to prepare the iron-carrying ordered mesoporous carbon materials. The obtained iron-carrying ordered mesoporous carbon materials are ordered in height, high in specific surface area (410-586m2 . g-1) and uniform in pore size distribution (3.9 nm). The method realizes the one-step synthesis of the iron-carrying ordered mesoporous carbon materials. Compared with mesoporous carbon synthesis through a hard template route and an impregnating-loading process, the method has the advantages of easy operation, low cost, low requirements for equipment, and the like. The iron-carrying ordered mesoporous carbon materials prepared by the method have wide application prospects in the fields of catalysis, separation, electrode materials, repair to environmental pollutants, and the like.

The invention relates to the technical field of high polymer materials, the technical field of 3D printing, and the field of 3D casting, in particular to a PLA modified material applied to 3D printing of large casting molds, and a method of the PLA modified material. The invention provides the PLA modified material applied to 3D printing of large casting molds, and the PLA modified material comprises the following components: polylactic resin, an inorganic filler, a plasticizer, a flexibilizer, a coupling agent, a chain extender, an antioxidant, an anti-hydrolysis agent, a compatilizer, and a lubricant. To overcome defects in the prior art, the invention creatively develops the PLA modified material specially applied to 3D printing of large casting molds, and the PLA modified material has the advantages of being low in shrinking percentage, good in dimensional stability, high in strength, not liable to be affected with damp, low in price, easy to degrade, environment-friendly, non-toxic, non-irritant, non-pollution and the like.

The invention relates to a method for preparing a high-strength high-toughness magnesium alloy plate strip by cold deformation and artificial ageing, comprising the following steps of: placing a magnesium alloy in a thermal deformation state or a solid solution magnesium alloy cooled by water quenching after temperature preservation at the temperature of 400-540 DEG C for 1-15 hours into liquid nitrogen to be subjected to subzero treatment and cold deformation, or directly carrying out cold deformation on the original magnesium alloy in the thermal deformation state or the solid solution state, wherein the deformation is controlled to be 5-20%; and finally preserving the temperature of 100-250 DEG C for 5-100 hours and then carrying out artificial ageing, thus the high-strength high-toughness magnesium alloy is obtained. The method provided by the invention is reasonable in design, the equipment requirement is simple, the operation is convenient, and the problems that the cost is high, a large magnesium alloy is difficult to prepare and large-scale application is difficult to realize in the traditional high-strength high-toughness magnesium alloy preparation process can be effectively solved; and magnesium alloy plate strips with excellent comprehensive mechanical properties such as strength, stretchability and the like, thus the method has a good industrial application prospect.

The invention relates to a preparing method of a metal carrier catalyst coating, wherein, the metal carrier catalyst coating which has an alloy metal high temperature treated as a substrate firstly loads a first layer alumina sol AlOOH, after drying loads a second layer Al2O3 paste, then drying and calcining to obtain a firmly coating; or loads mixed paste comprised by Al2O3 and the other metal oxide required by reaction on the dried AlOOH coat to obtain a catalyst active coat after drying and calcining; or an active coating for especial reaction is obtained by further loading paste which is the other metal oxide required by reaction on the second Al2O3 paste coat, and then drying and calcining. Then the active components are loaded on the obtained catalyst coating, after drying and calcining to prepare the metal carrier catalyst. The coating and the metal carrier of the invention are combined firmly. The invention can prepare the composite coating metal carrier catalyst based on different reaction requirement and the process and device for preparing is simple.

The invention relates to a wolfberry soluble dietary fiber and a preparation method thereof. The soluble dietary fiber is separated from medlar residues; the medlar residues comprise residues produced by producing wolfberry juice, wolfberry fruit wine, wolfberry polysaccharide, wolfberry aqueous extracts, wolfberry alcohol extracts and the like. The preparation method comprises the following steps of treating the wolfberry residues by an acidic liquid, an alkaline liquid or enzymes, performing solid-liquid separation on a treating liquid, concentrating a clear liquid, depositing ethanol, and drying to obtain the wolfberry soluble dietary fiber. The technology is simple; the requirement for equipment is low; the color of a product is relatively good, and the product is relatively high in dissolvability, expanding capacity, water-holding capacity and oil-holding capacity; the wolfberry soluble dietary fiber is suitable for developing health food or being used as a food additive.

The invention discloses an antenna array single base station positioning method based on pulse amplitude ratio fingerprints. The antenna array single base station positioning method includes steps of 1), establishing a fingerprint database; 2), performing AOA (angle of arrival) estimation by means of the fingerprint database; 3), performing TOA (time of arrival) estimation: utilizing the conventional method to measure TOA and calculating the distance; and 4), performing wireless UWB (ultrawide band) positioning: according to the estimation values of the AOA and the TOA, realizing wireless positioning based on UWB by means of conventional UWB positioning algorithm. According to the above method, pulse amplitude measurement substitutes for conventional pulse arrival trace time measurement, so that calculation of high-precision clock required for the AOA of signals due to trace time different measurement can be avoided, equipment requirements of a base station are simplified, and meanwhile, positioning accuracy of the system can be increased since amplitude measurement is simpler and higher in accuracy. Besides, simulation result indicates that error of the AOA calculated by the pulse amplitude measurement can be controlled within 0.1 degree.

The invention discloses a method for preparing Kefir sour milk which comprises water, sugar and sour milk prepared from the fermentation of two different Kefir grains; the preparing method comprises the follow steps: 1. raw milk is sterilized and then cooled to the temperature of 20 DEG C to 30 DEG C; 2. the two different Kefir grains are activated and cultured separately; 3. the activated and cultured Kefir grains with inoculum size of 2 percent to 5 percen are respectively inoculated to the sterilized raw milk; 4. the raw milk is fermented for 15 hours to 24 hours at the temperature of 20 DEG C to 30 DEG C; 5. the Kefir grains are filtered out to obtain two filtrates which are fermentation agents; 6. the two fermentation agents are mixed; 7. the mixed fermentation agents with the inoculum size of 2 percent to 5 percent are inoculated to the sterilized original milks and then fermented at the variable temperature ranging from 20 DEG C to 45 DEG C for 4 hours to 6 hours; and 8. the fermented milk are blended, homogenized and canned. With the adoption of the fermentation agents for fermenting at the variable temperature, the flavor of Kefir milk is well improved. The ferment time of the product is short, the yeasts in the mixed fermentation agents are more stable and the difference between flavors of Kefir sour milk prepared in different batches is small. The product has health-care functions of regulating beneficial bacteria in intestinal canals, lowering blood lipids, resisting tumors and the like, thus being a low-cost functional beverage.

The invention discloses a zero dimension perovskite structure luminescent material A4BX6 and a preparation method thereof. The preparation method comprises the steps of utilizing a principle that the solubility of a solute in a precursor solution can be reduced through an anti-solvent, dripping or slowly diffusing the anti-solvent into the precursor solution so as to prepare the zero dimension perovskite structure efficient luminescent material A4BX6 powder or a single crystal, and concretely, dissolving an A-containing halogen compound and a B-containing halogen compound or B-containing oxide into a solvent to obtain the precursor solution; slowly dripping or diffusing the precursor solution into the anti-solvent, and separating out the zero dimension perovskite structure luminescent material A4BX6 from the precursor solution. The method has the advantages that the obtained zero dimension perovskite structure luminescent material A4BX6 has high purity, the luminous efficiency is high, the requirement on the used equipment is simple, and the like.

The invention discloses a method for selectively separating and extracting vanadium and chromium from a solution containing the vanadium and the chromium. The method comprises the following steps: (1) NaHSO3 is added to reduce V (V) and Cr (VI) into V (IV) and Cr (III), (2) H2O2 is added to oxidize the V (IV) into V (V), (3) an ion exchange column is used to selectively absorb anions containing the vanadium, and effluent before penetrating is collected, (4) the chromium in the ion exchange column is washed down, and the effluent before penetrating is added to extract the chromium, (5) NaOH is used to elute resin carrying the vanadium to obtain eluant containing the vanadium, (6) ammonium metavanadate is prepared from the eluant and then roasted to obtain V2O5, and (7) the potential of hydrogen (PH)of a chromium solution is adjusted to enable the chromium to be separated out in the form of Cr(OH)3.nH2O, and then Cr2O3 powder is obtained through roasting. The method for selectively separating and extracting the vanadium and the chromium from the solution containing the vanadium and the chromium achieves efficient separation and high-purity extraction of the vanadium and the chromium, the overall recovery rate respectively reaches 82-90 % and 94-99 %, the purity of finished products respectively reaches 96-99 % and 94-97 %.

The invention designs a composite material. The composite material comprises carbon-fiber perform, matrix carbon, filler and diamond-like carbon, wherein the matrix carbon is uniformly adhered on the carbon fiber of the perform to form the carbon-fiber perform with the matrix carbon; the filler fills the inside of the carbon-fiber perform with the matrix carbon and coats the outside of the carbon-fiber perform with the matrix carbon to form a semifinished product; the diamond-like carbon comprises a diamond-like carbon layer coated on the semifinished product; and the filler contains a Ti element, a Si element, a C element and a Mo element. The composite material has the advantages that a method of combining four processes of CVI, SI, RMI and PECVD to prepare a finished product with the advantages of high compactness, low thermal expansion coefficient and friction coefficient, high self-lubricating property, high thermal conductivity, oxidation resistance, thermal shock resistance, ablation resistance, wear resistance, high strength and toughness and the like; and simultaneously, the process is simple, the preparation period is short, the equipment requirement is low, the cost is low, net shaping can be realized and convenience is brought for large-scale industrial application.

The invention belongs to the technical field of semi-permeable membrane separation processes, and relates to a composite thin membrane with a multilayer composite structure and a preparation method thereof. The composite thin membrane is formed by coating nano-cellulose and a transition layer which is formed from a polyelectrolyte by a layer-by-layer assembling method on a porous supporting layer substrate in sequence, and then coating a polyamide selective membrane layer which is formed through a common interface polymerization reaction method. A composite thin membrane structure can be applied to preparation of a nano-filtration membrane, a reverse osmosis membrane and a forward osmosis membrane. The application of the composite thin membrane with the multilayer composite structure comprises tap water purification, municipal water supply, sewage purification, brackish water desalination, seawater desalination, drink juice concentration process, dairy industry, blood dialysis medicine industry and semiconductor industry.

The invention relates to a conflict-free, on-demand multiple access method, comprising: central control node announces collisions of node-sent reserved access packets have occurred and starts up conflict resolution stages, where each conflict resolution stage comprises several forecast burst and forecast confirm micro time gaps set in sequence; in the forecast burst micro time gap, each access conflicting node monitors or sends forecast burst packet according its virtual ID number, and the central control node receives the forecast burst packets; in the following forecast confirm micro time gaps, the central control node sends the results, and each access conflicting node monitors the results; after a node succeeds in access, the central control node sends result broadcast packet. And the invention can assure access conflicting nodes quickly connect to channel and obtain the channel use right and increases service packet transmitting time as far as possible, and increases the throughput of channel.

The invention provides a Bi0.92-xHo0.08AExFe0.97Mn0.03O3-Zn1-yNiyFe2O4 ferromagnetic composite film and a preparation method thereof. The ferromagnetic composite film comprises a Bi0.92-xHo0.08AExFe0.97Mn0.03O3 crystalline film and a Zn1-yNiyFe2O4 crystalline film, which are compounded together. The preparation method is as below: first respectively preparing a Zn1-yNiyFe2O4 precursor solution and a Bi0.92-xHo0.08AExFe0.97Mn0.03O3 precursor solution, wherein AE is Sr, Ca, Ba or Pb, x equals to 0.01-0.04, and y equals to 0.1-0.9; preparing a plurality of Zn1-yNiyFe2O4 films on a substrate by spin coating; and then preparing plurality of Bi0.92-xHo0.08AExFe0.97Mn0.03O3 films on the Zn1-yNiyFe2O4 films by spin coating, so as to obtain the ferromagnetic composite film. The method regulates the crystal structure of BiFeO3 by doping, and uses ferromagnetic Zn1-yNiyFe2O4 as the magnetic layer, so as to substantially increase the ferroelectric and ferromagnetic properties of the film, and effectively reduce the leakage current density of the film.

The invention discloses a nano zinc oxide-doped powder and a preparation method thereof. Silicon-aluminum co-doped nano zinc oxide powder is synthesized by using a co-precipitation and calcining one-step method; and the mol ratio of aluminum as a doping element to zinc oxide and the mol ratio of silicon as a doping element to the zinc oxide are (0.03:1)-(0.18:1) respectively. The nano zinc oxide-doped powder disclosed by the invention has the advantages that the whiteness of nano zinc oxide and the light transmittance in a visible light band are improved; the photocatalytic activity of the nano zinc oxide, the dissolving of zinc ions and the particle size increase of the zinc oxide particles in the roasting process are inhibited; and the dispersibility of the nano zinc oxide in water is improved; and the preparation method has the advantages of convenience in operation, simple requirement on equipment, short process flow, low cost and suitability for large-scale industrial production.

The invention belongs to the technical field of mesoporous material preparation, in particular to a mercapto-functionalized organic inorganic hybrid ordered mesoporous silicon material and a synthesizing method thereof. The material has high content of mercapto functional group (0.1 to 15 weight percent), high specific surface area (200 to 500m<2> / g), large pore volume (0.1 to 1.0cm<3> / g), and uniform pore diameter (3 to 12nm), and has a two-dimensional hexagonal mesoscopic structure. The synthesizing method comprises the following steps: carrying out prehydrolysis on an inorganic silicon source and a mercapto-containing organic silicon sources under an acidic condition to form a silicon source precursor; mixing the precursor with nonionic surfactant, adding soluble resin in the mixture, and carrying out self-assembly in the organic solution to obtain the mercapto functionalized-nonionic surfactant composite material; and removing the surfactant through solvent reflux extraction. The material has simple operation and low cost, can be used as an adsorbent for heavy metal ions in wastewater, and opens a new way for treatment of industrial wastewater containing heavy metal.

The invention discloses an electric field aided silicon through hole etching process. The process comprises the following steps of (1) spinning a photoresist on a monocrystalline wafer and performing optical lithography or electron-beam lithography to obtain a photoresist pattern; (2) plating a silver film or a golden film; (3) in an electric field, taking a mixed solution of HF, H2O2 and deionized water as an etching agent to perform metal catalytic etching; (4) removing the photoresist; and (5) removing the residual metal film on the monocrystalline wafer and cleaning the monocrystalline wafer. Through hole structures with various micro nanometer sizes from tens of nanometer to hundreds of nanometer are formed by controlling the strength of the electric field in the etching process.