285 results about "Silicon oxygen" patented technology

The invention provides a low-dielectric glass fiber composition, a low-dielectric glass fiber and a preparation method thereof, and the low-dielectric glass fiber composition comprises the following components in molar percentage: 54 to 60 percent of SiO2, 21 to 32 percent of B2O3, 1.0 to 9.5 percent of Al2O3, 3 to 16 percent of alkaline earth metal oxide, 0.01 to 4.0 percent of ZrO2, 0.1 to 4.0 percent of TiO2, 0.01 to 2.0 percent of LiO2 and 0.5 to 5.0 percent of F2. Wherein the alkaline earth metal oxide comprises CaO and MgO, and according to the molar percentage, the CaO accounts for 0.01%-4.0%, and the MgO accounts for 0.5%-8.0%. According to the glass fiber, SiO2 and B2O3 are taken as main components of the glass, SiO2 can be taken as a network former of a glass structure, on one hand, part of B2O3 can form a [BO4] tetrahedral structure to enter a glass silica network structure so as to play a role in reinforcing a net, and on the other hand, B2O3 can effectively inhibit ion polarization so as to reduce the dielectric constant and dielectric loss of the glass fiber; according to the present invention, the specific type of the alkaline earth metal oxide is added, and the certain content of the Al2O3, the ZrO2, the TiO2, the LiO2 and the F2 is supplemented so as to further reduce the dielectric constant and the dielectric loss of the glass fiber, and the cooperative control of the components is beneficial to the improvement of the glass processing property and the guarantee of the glass fiber drawing stability.

The invention relates to an electrode material additive, a preparation method thereof and a battery, the electrode material additive comprises an end chain and a polymeric chain link containing a silicon-oxygen bond, the end chain is connected with the end part of the polymeric chain link, and the end chain comprises a polar chain segment; the polymerized chain link is rotationally polymerized into a core body, and an end chain forms a shell to coat the core body. The electrode material additive can solve the problems of cracking, powder falling and falling caused by insufficient toughness of a pole piece.

The invention discloses a preparation method of fireproof temperature-resistant special tempered glass, which comprises the following steps: pretreating substrate glass by using a mixed solution of cesium hydroxide and potassium hydroxide, with the cesium hydroxide content of 0.2-15 wt% and the potassium hydroxide content of 0.5-10 wt%; substrate glass is placed in the mixed solution of cesium hydroxide and potassium hydroxide, the mixed solution is placed in a micro-high-pressure environment for 0.5-1 hour, and the micro-high pressure is 10-15 MPa; basic glass is pretreated through a cesium hydroxide and potassium hydroxide mixed solution, under the synergistic effect of cesium hydroxide and potassium hydroxide, a hydroxyl layer on the surface of the glass is more easily removed, a silicon-oxygen network structure is damaged, a silicon-oxygen network is broken, more new diffusion ion channels are formed, and the ion exchange speed is increased; pretreatment is carried out in a micro-high-pressure environment, so that the substrate glass pretreatment speed can be increased, and the pretreatment time is remarkably shortened.

The invention belongs to the technical field of lithium battery silicon-oxygen negative electrode materials, and particularly relates to a porous carbon carrier for a lithium battery silicon-oxygen negative electrode and a preparation method, the preparation method comprises the following steps: 1) pretreating raw oil to obtain a low-condensation-degree carbon-rich precursor; 2) performing oxidation crosslinking treatment on the low-condensation-degree carbon-rich precursor to obtain a heavy condensation polymer; 3) carrying out multistage supercritical extraction separation on the heavy condensation polymer to respectively obtain a component A, a component B and a component C, and drying and mixing the component A, the component B and the component C to obtain a carbon carrier precursor; 4, the carbon carrier precursor is subjected to pre-oxidation, etching and carbonization, and the porous carbon carrier for the silicon-oxygen negative electrode is obtained.The prepared porous carbon carrier for the silicon-oxygen negative electrode of the lithium battery has the advantages of being small in density, light in mass, reasonable in pore size distribution, high in specific surface area and excellent in conductivity.

The invention discloses a radiation refrigeration coating as well as a preparation method and application thereof, and relates to the technical field of material preparation. The preparation method comprises the following steps: sintering hexagonal boron nitride, and removing boron oxide to obtain modified boron nitride powder; the preparation method comprises the following steps: reacting supramolecular polysiloxane with methoxypolyethylene glycol to obtain hyperbranched polysiloxane; the modified boron nitride powder and hyperbranched polysiloxane are subjected to hydrolysis on boron nitride under the alkaline condition, and silane modified boron nitride is obtained; the silane modified boron nitride is added into a polyurethane coating matrix to form the radiation refrigeration coating. The silicon-oxygen modified group is introduced to the surface of the boron nitride, so that the interaction between the boron nitride and the coating group is greatly improved, and the stability of the coating is improved; the coating can be cured under different environmental conditions, and construction on power equipment is facilitated; the formed radiation refrigeration coating is high in sunlight reflectivity, high in mid-infrared emissivity and high in heat dissipation capacity for power equipment.

The invention provides a secondary battery and an electrochemical device, and relates to the field of electrochemical energy storage. The secondary battery comprises an electrolyte and a negative pole piece, the electrolyte comprises a first substance, and the first substance comprises at least one of compounds with a structure as shown in a formula I; the negative pole piece comprises a negative pole material layer; the negative pole material layer comprises carbon black, single-walled carbon nanotubes, carbon fibers and a silicon-based material; the silicon-based material comprises at least one of a silicon-carbon material, a silicon-oxygen material, a silicon alloy material and a pure silicon material. According to the secondary battery, the electrolyte is designed to contain a compound with a specific structure as shown in the formula I, the mass content of the compound is controlled to be 0.5%-30%, and meanwhile, the negative electrode material layer comprises carbon black, single-walled carbon nanotubes and carbon fibers, so that the high-temperature storage performance, the cycle performance and the high-low-temperature fast charging performance of an electrochemical device containing a silicon negative electrode are remarkably improved.

The invention relates to the technical field of silicon-oxygen negative electrode materials, in particular to a low-expansion-rate silicon-oxygen negative electrode material based on a porous carbon carrier and a preparation method thereof.The preparation method comprises the steps that 1, raw oil is pretreated to obtain a low-condensation-degree carbon-rich precursor; 2, sequentially carrying out oxidation crosslinking, molecular cutting, pre-oxidation and activation treatment on the low-condensation-degree carbon-rich precursor to obtain a porous carbon carrier; and step 3, taking the porous carbon carrier as a substrate, and carrying out vapor deposition and pyrolysis treatment to obtain the low-expansion-rate silicon-oxygen negative electrode material. According to the invention, the porous carbon carrier is used as the substrate, and the silicon-oxygen negative electrode material is obtained through vapor deposition and pyrolysis treatment, and has the characteristics of low expansion rate, good cycle stability and the like.

The invention relates to the technical field of photoetching, in particular to an anti-HF photoresist-removing alkali-soluble photoresist and a preparation method thereof. The problems that in the prior art, photoresist is poor in hydrofluoric acid resistance effect, and alkali is difficult to dissolve in the photoresist removing process are solved; the preparation method comprises the following steps: introducing a silicon-oxygen bond to obtain modified phenolic resin, adding a fluorine-containing acrylate monomer to obtain modified acrylate, stirring, dispersing, filtering and removing impurities from the modified phenolic resin, the modified acrylate, propylene glycol methyl ether acetate, a photosensitive substance and an auxiliary agent to obtain a photoresist colloid; stirring and dispersing the photoresist colloid and the modified nano titanium dioxide, and removing impurities to obtain the hydrofluoric acid-resistant degumming alkali-soluble photoresist; rigid silica groups and rigid fluorine-containing groups are introduced, modified nano titanium dioxide is cooperatively used for filling gaps of photoresist resin, the hydrofluoric acid resistance of the photoresist is improved, meanwhile, after acid etching, the resin gaps are used for improving the alkali dissolution rate, and pollutant generation and organic solvent use in the photoresist removing process are reduced.

The invention provides a silicon-oxygen composite material which comprises a silicon-oxygen material matrix and a first doping element distributed in the silicon-oxygen material matrix, at least part of the first doping element exists in the silicon-oxygen material matrix in a crystal form, and the grain size of the crystal is smaller than or equal to 9 nm. Wherein the first doping element meets the condition that the lithium ion diffusion coefficient of the elementary substance of the first doping element at the temperature of 25 DEG C is greater than that of the elementary substance of silicon at the temperature of 25 DEG C.

The invention relates to the technical field of batteries, in particular to a silicon-carbon composite material, a preparation method thereof, a negative plate and a battery. The provided silicon-carbon composite material comprises: an inner core, the inner core comprising silicon carbon; the middle layer is coated on at least part of the surface of the inner core, and the middle layer comprises silica; the first carbon coating layer is coated on at least part of the surface of the middle layer; and the second carbon coating layer coats at least part of the surface of the first carbon coating layer. The negative plate comprises the silicon-carbon composite material. The silicon-carbon composite material disclosed by the invention has good dimensional stability, and is faster in lithium ion diffusion and better in dynamics than an unmodified silicon-carbon material, the resistance of an electrode plate is lower, and the charge-discharge and rate capability of an electrode under high current density can be optimized.

The invention discloses a modified porous silica negative electrode material of a lithium ion battery and a preparation method and application of the modified porous silica negative electrode material, the modified porous silica negative electrode material comprises an inner core layer and a shell layer coating the inner core layer, and the inner core layer is a pre-magnesium silica material, namely porous SiO; the shell layer comprises a carbon nano tube growing on the surface of the porous SiO in situ and a carbon nano tube-nitrogen-doped conductive coating and repairing carbon layer, and the carbon nano tube is embedded in a porous channel of the porous SiO. The modified porous silica negative electrode material is prepared by constructing porous defects on the surface of silicon monoxide, modifying in-situ catalytic growth of carbon nanotubes and doping, coating and repairing a structure; according to the method, the carbon nanotubes can be quickly and uniformly grown on the surface of the porous silica powder and in pore channels, so that firm connection between the inner core layer and the outer shell layer is formed; meanwhile, the electronic conductivity and the ionic conductivity of the material are improved through the point-line-point connection mode. The obtained modified porous silica negative electrode material for the lithium ion battery has relatively high first efficiency, excellent conductivity and cycle rate capability.

The invention provides a dry-method negative pole piece as well as a preparation method and application thereof. The dry-method negative pole piece at least comprises a negative pole current collector, a positive pole piece and a negative pole piece, the dry-method negative electrode active layer is at least arranged on the surface of one side in the thickness direction of the negative electrode current collector, the dry-method negative electrode active layer comprises a negative electrode active material, a conductive agent and a binder, and the uniformity of the binder in the dry-method negative electrode active layer is 85%-96%; the negative electrode active material comprises a silicon material, and the silicon material comprises but is not limited to silicon, a silicon carbon material and a silicon oxygen negative electrode material. According to the dry-method negative pole piece as well as the preparation method and the application thereof provided by the invention, the expansion of the negative active material can be inhibited, and the safety performance can be improved.

The application relates to the technical field of lithium ion battery materials, and discloses a low-expansion silicon-carbon material and a preparation method thereof. The low-expansion silicon-carbon material has a porous core-shell structure, the inner core is graphene / metal-doped amorphous carbon-coated nano silicon, and the shell is boron-doped amorphous carbon. The preparation method comprises the following steps: firstly, a silicon oxide compound, a graphene oxide solution and an organic metal polymer are added into an organic carbon source solution, spray drying is carried out, and an oxidized graphene-coated metal-doped silicon oxide precursor material is obtained through reaction; secondly, a mixed gas of a boron source gas and argon is introduced into the oxidized graphene-coated metal-doped silicon oxide precursor material, and a boron-doped silicon-carbon composite material is obtained through reaction; and thirdly, the boron-doped silicon-carbon composite material is soaked in a hydrofluoric acid solution, and the low-expansion silicon-carbon material is obtained after drying. Through the technical scheme, the problems of high expansion and poor rate performance of the silicon-carbon material in the related art are solved.

The invention belongs to the technical field of preparation of refractory materials, and particularly relates to a method for preparing a mullite-high silica glass multiphase material from hard clay. The preparation method comprises the following steps: (1) mixing hard clay, yellow jade, molybdenum tailings and lepidolite lithium slag to obtain a mixture, and then performing crushing and classified screening to prepare mixture granules with different particle sizes; (2) uniformly mixing the mixed particles with different particle sizes, adding a mixture of sodium dihydrogen phosphate dihydrate, yttrium oxide and tungsten trioxide, and grinding to obtain powder; (3) pressing into a green body and drying; and (4) sintering to prepare the mullite-high silica glass multiphase material. The mullite-high silica glass multiphase material prepared by the method disclosed by the invention has excellent refractoriness and relatively low thermal expansion coefficient.

The invention discloses a method for in-situ growth of SiOx in a carbon nanotube cluster by using a liquid phase method and application, and belongs to the technical field of functional materials. The method comprises the following steps: dissolving silane A and silane B in a hydrochloric acid solution to obtain a silane mixed solution; the preparation method comprises the following steps: dispersing carboxylated carbon nanotubes in deionized water to obtain a carbon nanotube dispersion liquid; adding the carbon nanotube dispersion liquid into the silane mixed solution, stirring and mixing, aging at normal temperature, collecting a precipitate, and drying; and carrying out high-temperature pyrolysis carbonization on the dried product in an inert gas atmosphere to obtain the CNTs (at) SiOx-F (at) C composite material. The carbon nanotubes in the obtained material are intertwined to form a cluster structure due to the crosslinking effect of silane, and SiOx grows on the tube walls of the carbon nanotubes in clusters. The special structure has a rapid electron and ion conduction channel, and internal gaps can relieve volume expansion in the SiOx circulation process, so that the comprehensive electrochemical performance of the silicon-oxygen negative electrode in the lithium ion battery is improved.

The invention provides a silicon-oxygen-carbon composite material as well as a preparation method and application thereof, the surface layer of a silicon-oxygen material of a bulk phase of the composite material is lithiated and reduced into silicon, meanwhile, a double-layer carbon structure ensures the conductivity of the material, a plasma carbon coating layer is formed on the surface of SiO by utilizing a PECVD (Plasma Enhanced Chemical Vapor Deposition) technology before pre-lithiation, and the conductivity of the material is improved. After pre-lithiation, a heteroatom porous carbon coating layer is constructed on the surface of the material, so that a surface conductive layer is kept in contact with the inside, and doping modification is realized while carbon coating is performed. According to the preparation method, the microstructure of the pre-lithiated SiO is optimized, the growth of silicon particles in the pre-lithiation process is reduced, a three-dimensional penetrating conductive network is formed by combining the external carbon layer and the internal carbon layer, a channel is provided for rapid transmission of lithium ions, the conductivity of the material is improved, and volume expansion is relieved. The preparation process is simple, the first efficiency of the material is high, the conductivity is good, and the cycle rate capability is good.

The invention relates to a high-temperature proton exchange membrane, in particular to a semi-interpenetrating high-temperature proton exchange membrane based on imidazolyl polyion liquid and a preparation method of the semi-interpenetrating high-temperature proton exchange membrane. The preparation method comprises the following steps: dissolving polybenzimidazole, a silane coupling agent and the imidazolyl polyionic liquid in dimethyl sulfoxide to obtain a mixture, spreading and drying the mixture to prepare a membrane, and performing acid catalysis to form a silicon-oxygen cross-linked structure, thereby obtaining the semi-interpenetrating high-temperature proton exchange membrane based on the imidazolyl polyionic liquid. A silicon-oxygen cross-linked network structure is introduced into the proton exchange membrane, so that the oxidation resistance and tensile strength of the membrane can be improved, and the swelling rate of the acid-doped membrane can be reduced; the phosphoric acid adsorption rate can be improved by introducing the imidazolyl polyion liquid, so that the proton conductivity is improved.

The invention relates to the technical field of lithium ion batteries, in particular to a negative electrode material of a lithium ion battery and a preparation method of the negative electrode material. The negative electrode material comprises a porous matrix, a conductive carbon material and a coating layer from inside to outside. And the porous matrix is made of silicon, silicon alloy or silicon oxide. The porous substrate comprises a plurality of pores, and at least part of the pores are opened in the surface of the porous substrate. Part of the conductive carbon material is located on the surface of the porous matrix, and part of the conductive carbon material is located in pores of the porous matrix. And the coating layer has ionic conductivity and / or electronic conductivity, and wraps the whole formed by the porous matrix and the conductive carbon material. Based on the lithium ion battery negative electrode material provided by the invention, the damage to the material caused by silicon volume expansion when a silicon material, a silicon alloy material and a silica material are used as the negative electrode material can be reduced, and the conductivity of the negative electrode material can be improved, so that the electrochemical performance of the silicon-based negative electrode material is improved.

The invention relates to the field of electrochemistry, discloses a silicon-oxygen-carbon negative electrode material as well as a preparation method and application thereof, and aims to solve the technical problems of poor conductivity and poor cycling stability of a silicon-oxygen negative electrode material. The preparation method comprises the following steps: dispersing conductive carbon in deionized water, and adding a stabilizer silicon monoxide powder to obtain turbid liquid; the preparation method comprises the following steps: dissolving an amino organic compound in deionized water, adding glacial acetic acid to form a protonated solution A, and adding metal salt to form a solution B; and adding the turbid liquid into the solution B, and carrying out chemical reaction, spray drying and high-temperature carbonization to obtain the silicon-oxygen-carbon negative electrode material. The protonated amino organic matter and a silicon-oxygen Si-O-end bond have an attraction effect, and the amino on the silicon-oxygen surface is further bonded with graphitized carbon such as a carbon tube under the electrostatic action of metal ions to form a graphitized carbon tube and amorphous coated carbon crossed through three-dimensional cross-linked stable carbon layer. According to the invention, the coating uniformity and conductivity of the material are innovatively improved from the material structure, so that the capacity exertion and cycling stability of the lithium ion battery are guaranteed.

The invention provides a method for machining a straight micro through hole in glass through ultrafast laser and a machining system. The method comprises the following steps that three glass workpieces are bonded into a sandwich type workpiece through an optical cement technology; the Bessel beam is focused on the sandwich type workpiece by adjusting the length of the Bessel beam; ultrafast laser irradiates the sandwich type workpiece, so that the material structure of the inner area of the glass is converted into a silicon-oxygen three-membered ring or a silicon-oxygen four-membered ring from a silicon-oxygen six-membered ring, and the sandwich type workpiece with a vertically-through modified microarray area inside is obtained after processing; the sandwich type workpiece after laser processing is separated through the optical cement removing technology, and only the target workpiece in the middle is reserved; putting a target workpiece into an etching solution, introducing ultrasonic oscillation for etching, and corroding a silicon-oxygen three-membered ring or a silicon-oxygen four-membered ring in an internal modified microarray region by an etching agent to form a micro through hole; and cleaning the etched target workpiece. The appearance of a horn mouth can be avoided.

The invention relates to a preparation method and application of an alkali-activated iron tailing geopolymer adsorbent. According to the method, an iron tailing geopolymer is prepared through an alkali activation method, that is, an aluminosilicate structure in iron tailings is destroyed in an alkali activation mode, so that silica tetrahedron and alumina tetrahedron structures of the iron tailings are reconstructed, and a geopolymer material with adsorption capacity is prepared; on the basis, a foaming agent hydrogen peroxide solution is introduced to adjust the performance, and parameters such as modulus, water cement ratio and curing temperature of the alkali activator are respectively adjusted to prepare an optimal sample. The iron tailing geopolymer adsorbent material which is high in adsorption rate and good in stability is obtained, and the effect of adsorbing residual ciprofloxacin in wastewater is remarkable.

The present invention discloses a lithium ion battery negative electrode material, the components and the mass fractions of the components are as follows: 88-105 parts of active material, 0.01%-0.1 parts of single-walled carbon nanotubes, 0.01%-0.5 parts of graphene nanoribbons, less than 1 part of super conductive carbon black, less than 1 part of few-walled or multi-walled carbon nanotubes, 0.05-0.5 parts of dispersant, 1-3 parts of thickener, 1-4 parts of binder, and 25-60 parts of solvent; the active material includes silicon oxide material SiO x and artificial graphite, of which 0

The invention provides a mesoporous silicate molecular sieve as well as a preparation method and application thereof, and belongs to the technical field of molecular sieves. The framework component of the mesoporous silicate molecular sieve provided by the invention is only silica, 14 kinds of topology independent atoms are contained in the framework, a 36-membered ring one-dimensional mesoporous channel system is contained in the crystal structure of the mesoporous silicate molecular sieve, and the material is good in thermal stability and can be applied as a catalyst or an adsorbent.

The application relates to the technical field of battery materials, and particularly discloses a silicon-oxygen negative electrode material, a preparation method and application thereof. The silicon-oxygen material is coated by adopting a'secondary ethyne carbon coating' process, the deposition conditions of ethyne cracking are accurately controlled, the fluorides remaining on the surface of the active substance are fully coated by the secondary carbon layer, direct contact between the fluorides and the electrolyte is isolated, and the high-temperature storage stability of the material is significantly improved. The battery prepared by adopting the material provided by the application has a highest high-temperature storage initial efficiency of 71%, and the high-temperature storage capacity retention rate of a comparative sample (fluoride exposure) without secondary ethyne carbon coating treatment is only 61%. It is shown that the growth range of the interface impedance of the material provided by the application is significantly reduced after high-temperature storage, and it is shown that the interface side reaction is effectively inhibited.

Embodiments of the present application provide a silicon-based composite negative electrode material, a preparation method thereof, a negative electrode sheet and a secondary battery. The preparation method comprises: preparing a precursor fiber by electrospinning a precursor dispersion liquid containing a first silicon source, a second silicon source, a first carbon source and a second carbon source; and obtaining the silicon-based composite negative electrode material by heat treatment of the precursor fiber; the first silicon source is silicon particles; the second silicon source carries one or more of a silicon halogen bond, a silicon oxygen bond and a silicon hydrogen bond in a molecular structure; the first carbon source is a high molecular compound; and the second carbon source is an oxygen-containing small molecule organic compound. The present application adds two silicon sources and oxygen-containing group organic compounds to the spinning precursor dispersion liquid, so as to improve the structural stability and electrochemical performance of the silicon-based negative electrode material, thereby achieving the technical effects of inhibiting volume expansion while ensuring high capacity, significantly improving the cycle stability and safety, and simplifying the preparation process and reducing the cost.

According to the preparation method, the surface of the silica material is coated with the carbon layer by using the solid-phase carbon source, then the carbon nanotubes are grown on the surface of the carbon coating layer in situ by using chemical vapor deposition, the carbon nanotubes are uniformly distributed on the surface of the carbon coating layer and are tightly combined, and a three-dimensional conductive network constructed on the surface of the carbon layer by the carbon nanotubes not only greatly improves the conductivity of the material, but also improves the conductivity of the material. When the composite material is applied to the lithium ion battery, the rate capability and the cycle performance of the lithium ion battery are obviously improved; in addition, no catalyst is used during in-situ growth of the carbon nanotubes, so that the subsequent step of removing the catalyst can be omitted, and the preparation method is simple and low in cost.

The invention discloses a silicon-oxygen negative electrode material, a preparation method of the silicon-oxygen negative electrode material, a negative electrode plate and a lithium ion battery, and relates to the technical field of batteries. The first coating layer is distributed on the surface of the silicon-based material in a discontinuous island-shaped structure; and the second coating layer coats at least part of the surface of the first coating layer and the surface of the silicon-based material which is not covered by the first coating layer through molecular layer deposition. According to the silicon-oxygen negative electrode material provided by the invention, the mechanical stability, the electrochemical performance and the interface durability of an electrode can be improved, so that the defects of single film coating in the aspects of volume expansion adaptability and conductivity are overcome.

The invention provides a silicon heterojunction cell, a preparation method and a photovoltaic module, and the method comprises the following steps: heating a pretreated substrate under a vacuum condition, and obtaining a heated substrate; sequentially growing an intrinsic amorphous silicon passivation layer, n-type doped hydrogenated microcrystalline silica, a transparent oxide conductive film and a metal electrode on the front surface of the heated substrate by adopting a chemical deposition method; sequentially growing an intrinsic amorphous silicon passivation layer, three p-type selective contact layers, a transparent oxide conductive film and a metal electrode on the back surface of the heated substrate by adopting a chemical deposition method; the three p-type selective contact layers comprise a p-type hydrogenated microcrystalline silicon layer, a CO2 lightly doped p-type hydrogenated microcrystalline silicon oxygen layer and a CO2 heavily doped p-type hydrogenated microcrystalline silicon oxygen layer; the three p-type selective contact layers constructed by the invention can provide excellent conductivity, transmittance and contact performance, and the filling factor of the cell is improved, so that the photoelectric conversion efficiency of the cell is improved.

The present invention relates to the field of separation technology, and specifically discloses a double-framework MOFs material MS-MIL-101 (Al) for cobalt ion separation and a preparation method thereof, comprising the following components: molecular sieve (3A), metal ion (Al) source, terephthalic acid, concentrated hydrochloric acid, ethanol and deionized water. Aluminum-oxygen tetrahedrons in silicon-aluminum molecular sieves can provide a good metal ion source for the generation of MOFs, which is conducive to the generation of MOFs skeletons, and silicon-oxygen units with a good skeleton structure provide a natural guarantee for the stability of the MOFs structure. Using terephthalic acid as a ligand, a MOFs material MS-MIL-101 (Al) with a double-framework structure is prepared in one pot by a hydrothermal method, which has the characteristics of simple preparation, low price and high stability.

A silicon-coated oxidation-resistant copper includes a SiCuOx layer includes a silicon (Si)-oxygen (O)-copper (Cu) mixed layer formed by depositing silicon (Si). The silicon-coated oxidation-resistant copper includes: a copper layer; the SiCuOx layer including the silicon (Si)-oxygen (O)-copper (Cu) mixed layer formed on the copper layer; a first silicon (Si)-oxygen (O) mixed layer formed on the SiCuOx layer; a silicon (Si) layer formed on the first silicon (Si)-oxygen (O) mixed layer; and a second silicon (Si)-oxygen (O) mixed layer formed on the silicon layer (Si) layer.