325 results about "Sio2 nanoparticle" patented technology

A process for preparing the nano-SiO2 coated carbonyl iron particles includes such steps as dispersing SiO2 nanoparticles and carbonyl iron particles by grinding, modifying the surface polarity of both particles by soluble caustic substance, coating the SiO2 nanoparticles on the surface of each carbonyl iron particle by physical adsorption, backing in vacuum or protective atmosphere, grinding, sieving and packing.

The invention discloses a method for grafting SiO2 nanoparticles with graphene oxide modified epoxy resin. The method comprises the following steps of: mixing ethyl orthosilicate with tetrahydrofuran, dropwise adding hydrochloric acid, stirring at the normal temperature, adding deionized water and sodium chloride, stirring uniformly, separating by using a separating funnel, removing a lower layer clear solution, adding anhydrous magnesium sulfate into an upper layer organic solution, standing over night, and filtering to obtain SiO2 sol; dropwise adding toluene diisocyanate into an ultrasonically-dispersed graphene oxide solution, adding the prepared SiO2 sol, performing suction filtration under reduced pressure, washing a product with absolute ethyl alcohol, and drying to obtain cinereous powder, i.e., SiO2 nanoparticle grafted graphene oxide; and adding the SiO2 nanoparticle grafted graphene oxide into an epoxy resin substrate, and carrying out a curing reaction to obtain a modified epoxy resin condensate. The method has the advantages of simple process, easiness in operating, environmental friendliness, simple equipment, contribution to reducing cost and applicability to mass production.

A composite SiO2-metal nanoparticle with a core-shell structure for the photothermal therapy of cancer is composed of a SiO2 nanoparticle as core and a coated metal layer as shell, and has the maximal extinctivity (300-2000 nm in wavelength) and the maximal UV absorption (300-2000 nm in wavelength). It's preparing process features that a molecular cross-linking agent is used for cross-linking between SiO2 and metal layer, the metallic nanoparticles are physically adsorbed onto surface of SiO2 nanoparticle, and the solution of relative metal is chemically reduced to cover on the residual surface of SiO2 nanoparticle.

Preparation and application methods for a magnetic core-shell nano composite adsorbent. The invention belongs to the fields of preparation and application of water treatment technology and adsorbents and mainly solves the problem that a conventional adsorbent is difficult to separate, as a solid phase, from a liquid phase and recycle after adsorption. The preparation method includes the steps of: 1) preparing Fe3O4 nano-particles having super paramagnetism through a coprecipitating method; 2) coating the surface of the Fe3O4 nano-particles with a SiO2 layer through a two-phase method to synthesize magnetic core-shell Fe3O4@SiO2 nanoparticles; 3) with the Fe3O4@SiO2 nanoparticles as a carrier and cetyl trimethyl ammonium bromide (CTAB) as a template agent, supporting a CeO2 layer onto the surface of the Fe3O4@SiO2 nanoparticles; 4) washing away the template agent CTAB with acetone to obtain the magnetic core-shell Fe3O4@SiO2@CeO2 nano composite adsorbent which has a mesoporous CeO2 layer. The magnetic core-shell Fe3O4@SiO2@CeO2 nano composite adsorbent has excellent magnetism, large specific surface area and a large number of adsorption sites, has significant removal effect on phosphates in water, is easy to separate, recycle and reuse after adsorption, and has excellent environment and economic benefits.

The invention discloses a preparation method of a modified fluorine-containing acrylic superhydrophobic resin emulsion, which comprises the following steps: preparing an organic hydrophobic modified SiO2 sol by a sol-gel process, and carrying out free-radical polymerization reaction under emulsifying conditions to graft SiO2 onto the fluorine-containing acrylic copolymer resin, thereby obtaining the SiO2 in-situ modified fluorine-containing acrylic superhydrophobic resin emulsion. While free radical emulsion polymerization is utilized to prepare the organic fluorine modified polyacrylate resin, the SiO2 nanoparticles are grafted by the copolymerization reaction, thereby successfully preparing the SiO2 nanoparticle in-situ modified fluorine-containing acrylic resin emulsion, and avoiding the key technical problem of very low modification ratio in the mechanical blending process. After the emulsion is completely dried, the composite coating can have excellent superhydrophobicity, and thus, the emulsion can be abundantly applied to many industrial fields. The reaction technique has the advantages of higher success rate and lower cost, and is simple to operate.

The invention belongs to the technical field of nano materials, and relates to a transparent self-cleaning SiO2 anti-fogging coating and a preparation method thereof. A static self-assembly method is adopted, and hierarchical mesoporous SiO2 nanoparticles and polyelectrolyte are alternately assembled to form the super hydrophilic or hydrophobic transparent self-cleaning SiO2 anti-fogging coating.The coating consisting of the hierarchical mesoporous SiO2 nanoparticles has a hierarchical porous structure and a hierarchical rough structure on the surface; and the hierarchical mesopores of the hierarchical mesoporous SiO2 nanoparticles are positioned on the surfaces of the hierarchical mesoporous SiO2 nanoparticles, and comprise 2-5nm mesopores enclosed by amorphous silicon dioxide frameworkstructures and 5-30nm mesopores enclosed by amorphous silicon dioxide framework structures. Because of the hierarchical mesopores of the hierarchical mesoporous SiO2 nanoparticles and pores among thehierarchical mesopores, the transmittance of a glass plate coated with the hierarchical mesoporous SiO2 nanoparticles is improved from 90.4 percent to 92.0 percent.

The invention relates to a superhydrophobic oleophobic modification method of a porous membrane, and belongs to the technical field of separation membrane. According to the present invention, based on the self-cleaning bionic principle, fluorosilane-modified SiO2 nanoparticles having low surface energy are dispersed in an organic solution to prepare a uniform dispersion liquid, and a porous membrane is subjected to superhydrophobic oleophobic modification by using a dynamic filtration method to prepare the amphiphobic composite membrane having good stability, wherein the water contact angle of the amphiphobic composite membrane surface can achieve 167.3+ / -1 DEG C, the contact angle of diiodomethane can achieve 145.9+ / -1 DEG C, and the good amphiphobic property is presented; and method has characteristics of no requirement of complex equipment, simple and easy-performing process and short preparation period, and the prepared membrane has characteristics of high flux and good pollution resistance.

An extreme-pressure antiwear additive for lubricating oil is prepared from basic oil, SiO2 nanoparticles, disperser and synergist.

The invention discloses a perovskite solar cell based on metal nanoparticle interface modification and a preparation method of the perovskite solar cell. In the perovskite solar cell, a thin layer of silicon dioxide coated gold (Au@SiO2) nanoparticles is additionally arranged between a hole transmission layer and a perovskite active layer of a planar heterojunction perovskite solar cell, the length of the Au@SiO2 nanoparticles is ranging from 20 nanometers to 60 nanometers, and the width of the Au@SiO2 nanoparticles is ranging from 5 nanometers to 25 nanometers; surface plasma resonance can be generated by the Au@SiO2 nanoparticles, so that the optical path of light in the perovskite active layer is increased, the absorption of the perovskite active layer to the light is improved, and the photoelectric conversion efficiency of the perovskite solar cell can be obviously improved; and compared with the perovskite solar cell without the Au@SiO2 nanoparticles, the photoelectric conversion efficiency of the perovskite soalr cell with the Au@SiO2 nanoparticles can be improved by over 35%. The preparation method of the perovskite solar cell based on metal nanoparticle interface modification, disclosed by the invention, is implemented by a solution technique at a low temperature, is high in repeatability and low in cost, and has a wide application prospect.

A composite agricultural chemical is composed of the active component and hollow porous SiO2 nanoparticles. Its preparing process is also disclosed. It may be liquid, emulsion, powder, or dry suspension.

The invention discloses a preparation method of a ratiometric fluorescent probe for bivalent copper ions. The preparation method comprises the following steps: 1) synthetizing cadmium telluride quantum dots: controlling the molar ratio of Cd2<+>:TGA:Te2<-> in a reaction product to be 1:2.5:0.5; 2) synthetizing amino-modified carbon quantum dots; 3) synthetizing blue-fluorescence carbon quantum dots doped with SiO2 nanoparticles: during synthesis, the volume ratio of the amino-modified carbon quantum dots obtained in the step 2), a chitosan solution of which the W / V is 0.5 percent, cyclohexane, Triton X-100, hexyl alcohol, ammonia water, TEOS and APTES is 5:1:750:177:180:5:6:3; 4) dispersing the cadmium telluride quantum dots obtained in the step 1) and the blue-fluorescence carbon quantum dots obtained in the step 3) in an MES buffer solution, adding a mixed solution of EDC and NHS, carrying out stirring, centrifugation and cleaning to obtain the probe. The probe prepared according to the method comprises nano particles containing the cadmium telluride quantum dots and the amino-modified carbon quantum dots, and has nucleus-satellite hybrid spherical structures. The invention further discloses application of the ratiometric fluorescent probe to detection of Cu2<+>. The ratiometric fluorescent probe has the advantages that the detection limit is very excellent, namely only 1.0*10<7>M; the preparation is simple; no expensive equipment is required.

The invention relates to a preparation method of modified silicon dioxide hydrogel, the modified silicon dioxide hydrogel and application of the modified silicon dioxide hydrogel. The preparation method comprises the following steps: under a magnetic stirring condition, dissolving sodium alginate, then adding carboxyl-modified SiO2 nanoparticles, uniformly dispersing the SiO2 nanoparticles into sodium alginate, then adding proper amounts of an initiator and a crosslinking agent, stirring for 10 min, then pouring into a square mould to form a gel, fixing and moulding to obtain carboxyl-modifiedSiO2 hydrogel, and cutting the carboxyl-modified SiO2 hydrogel into small square blocks of 1*1 cm as required. A SiO2 hydrogel material effectively improves the stability of an adsorbent material, can be repeatedly used for multiple times, effectively reduces the cost and solves the adsorbent recycling problem. The modified SiO2 hydrogel provided by the invention is simple in preparation technology, low in cost, high in selectivity and high in adsorption capacity, and has a good application prospect in heavy metal treatment.

The invention relates to the field of nano silica processing treatment and in particular relates to a method for preparing high-expansion nano silica composite microspheres. The method for preparing high-expansion nano silica composite microspheres comprises the following steps: performing surface grafting modification on SiO2 nanoparticles by using a surface modifier; adding the modified SiO2 nanoparticles into an organic solvent, simultaneously adding a dispersing agent, monomer acrylamide, acrylic acid, a cross-linking agent and an initiator, and ultrasonically and uniformly dispersing; introducing nitrogen into the dispersed solution for bubbling to remove oxygen; carrying out a polymerization reaction after oxygen removal; and repeatedly washing by using ethanol, thereby obtaining the composite microspheres. The microspheres disclosed by the invention have high structural stability, even if the solution temperature is close to the boiling point, the microspheres do not split, and the expansion properties are improved; and moreover, the initial size of the microspheres is less than 1 micron, the microspheres can be applied to plugging of tiny cracks, the final expansion ability can be over 10 times, and the microspheres have good salt tolerance, wide application range and reliable plugging capacity.

The invention provides a preparation method of magnetic fluorescent composite nanospheres. The preparation method comprises the steps of (1) preparing CdSe quantum dots by taking Na2SO3, selenium powder, cadmium acetate, N-acetylcysteine and deionized water as raw materials; (2) with FeCl3.6H2O sodium acetate anhydrous and ethylene glycol as raw materials, reacting in an autoclave to obtain Fe3O4 nanoparticles; (3) preparing a Fe3O4@SiO2 product by taking the Fe3O4 nanoparticles, tetraethoxysilane, absolute ethyl alcohol, deionized water and ammonium hydroxide as raw materials; and (4) conducting amino modification on the surface of the Fe3O4@SiO2 by utilizing a silane coupling agent KH-550, then loading CdSe onto the surface of the SiO2 through reaction, so as to obtain the final product magnetic fluorescent composite nanospheres. The preparation method has the characteristics that the prepared CdSe quantum dots have excellent water solubility and excellent fluorescent property and are about 3-4nm in diameter; the Fe3O4 nanoparticles are even in particle size and have good dispersity; the Fe3O4@SiO2 nanoparticles have an obvious core-shell structure, shell layers are evenly coated and are consistent in thickness; the magnetic fluorescent composite nanospheres has strong magnetism and excellent fluorescence property and can be used for site-specific drug transportation in a biological body and the fluorescence imaging of the biological body.

The invention discloses a drug carrier, a preparation method, a pharmaceutical composition made from the drug carrier, and applications of the drug carrier and the pharmaceutical composition. The mesoporous silica-coated gold nanorod (Au@SiO2) carrier is characterized in that: gold nanorods are coated with a layer of mesoporous silica. According to the preparation method, the Au@SiO2 carrier is prepared by taking hexadecyl trimethyl ammonium bromide-coated gold nanorods as raw materials via hydrolytic polymerization with orthosilicate ester, can be used for coating a plurality of drugs and probe molecules, and delivering the drugs and the probe molecules to parts of diseases so as to realize targeting therapy. After absorption of near-infrared laser, the Au@SiO2 carrier, or drug-loaded Au@SiO2 nanoparticles are capable of emitting fluorescence and transforming a part of light energy into heat energy, so that the Au@SiO2 carrier and the drug-loaded Au@SiO2 nanoparticles can be used for bioimaging, light-dependent control drug release (chemotherapy), and thermotherapy. The preparation method of the Au@SiO2 carrier is simple; the Au@SiO2 carrier can be used for a plurality of diagnosis and treatment methods, and the plurality of diagnosis and treatment methods can be combined, so that it is beneficial for avoiding defects of a single diagnosis and treatment method, and the drug carrier and the pharmaceutical composition are especially suitable for tumor diagnosis and treatment with complex requirements.

An extreme-pressure antiwear additive for lubricating oil is prepared from basic oil, SiO2 nanoparticles, disperser and synergist.

The invention discloses an adjustable-refractivity silicon dioxide coated quantum dot nano composite luminescent material which is composed of SiO2 nanoparticles, wherein each SiO2 particle is a nano composite particle formed by coating SiO2 on a single quantum dot or a nano composite particle formed by coating SiO2 on multiple evenly-dispersed quantum dots. The invention also discloses a method for preparing the nano composite particles (each of which is formed by coating SiO2 on a single quantum dot or coating SiO2 on multiple quantum dots) by inverse microemulsion polymerization reaction. In practical use, the technological parameters, such as consumptions of TEOS (tetraethyl orthosilicate), surfactant, catalyst and quantum dots, reaction time and the like, can be adjusted to adjust the thickness of the SiO2 shell and the proportion of the quantum dot core in the SiO2 coated quantum dot nano composite particles, thereby adjusting the refractivity of the SiO2 coated quantum dot nano composite material. The refractivity of the nano composite luminescent material is adjustable within the range of 1.42-1.98.

The invention relates to the field of nano technology and discloses a method for preparing SiO2-PDMAEMA nanoparticles having a core-shell structure. The method comprises the following steps of: selecting 2-bromideisobutyryl bromide with a higher initiation activity or a compound represented by a formula (I) as an initiator by using an atom-transfer radical-polymerization method; and during reaction, mixing CuX2 serving as a passivator, a ligand, SiO2 nanoparticles modified by the initiator, a solvent and diethylaminoethyl methacrylate at first and then adding CuX to perform a grafting reaction to obtain the SiO2-PDMAEMA nanoparticles with the core-shell structure. Experiments show that: the prepared SiO2-PDMAEMA nanoparticles have the advantages of controllable particle size, narrow particle size distribution and controllable molecular weight of the polymer PDMAEMA grafted on the surface of SiO2. Moreover, the preparation method provided by the invention has the characteristics of mild reaction conditions, convenience, feasibility and short preparation period and is easy for mass production.

The present invention provides a fluorescent silica-based nanoparticle that allows for precise detection, characterization, monitoring and treatment of a disease such as cancer The nanoparticle has a fluorescent compound positioned within the nanoparticle, and has greater brightness and fluorescent quantum yield than the free fluorescent compound To facilitate efficient urinary excretion of the nanoparticle, it may be coated with an organic polymer, such as polyethylene glycol) (PEG) The small size of the nanoparticle, the silica base and the organic polymer coating minimizes the toxicity of the nanoparticle when administered in vivo The nanoparticle may further be conjugated to a ligand capable of binding to a cellular component associated with the specific cell type, such as a tumor marker A therapeutic agent may be attached to the nanoparticle Radionuclides / radiometals or paramagnetic ions may be conjugated to the nanoparticle to permit the nanoparticle to be detectable by various imaging techniques.

The invention relates to a frame sealing adhesive. The frame sealing adhesive is prepared from, by weight, 5-10 parts of epoxy resin, 0.5-1.0 part of dispersing agent, 0.5-2.0 parts of SiO2 nanoparticles, 60-70 parts of acrylic resin, 0.5-1.0 part of coupling agents, 5-10 parts of heat curing agents, 0.1-1.0 part of photoinitiator, 0.1-1.0 part of molecular weight regulator, 4-6 parts of organic fillers and 5-10 parts of inorganic fillers. By means of the frame sealing adhesive, the design requirements of a narrow frame can be met, the phenomena of punctures, big heads, sawtooth shapes, nozzle blocking, slivers and burrs are avoided, and the production requirement of high-quality products is met.

The invention discloses a preparation method of mesoporous spherical Sio2 nanoparticles. The template agent used in the method is cetyl trimethyl p-methyl benzene sulfonate, the alkali source used in the method is a binary mixture comprising organic micro-molecular amine and inorganic base, the silica source used in the method is tetra alkyl silicate ester, and the molar ratio of cetyl trimethyl p-methyl benzene sulfonate to organic base to inorganic base to water is 1 to 0.03-0.06 to 0.5-2 to 0.01-0.35 to 80-500. By regulating the molar ratio of organic base to inorganic base, the particle size can be effectively controlled within 50-1000 nm. Compared with the prior art, the method disclosed in the invention has the most significant advantages that using cetyl trimethyl p-methyl benzene sulfonate as the template molecule can greatly reduce the dosage of surfactant, and regulating the molar ratio of the diacidic base can effectively regulate the final particle size. The method has theadvantages of simple processing, short cycle, low cost, and good repeatability, and is an environmental friendly synthetic method.

The invention relates to a preparation method of carbon cloth with the nanoparticle modified surface. The method comprises the steps of putting carbon cloth into an acetone solution, saturating, and drying the carbon cloth after the saturating in the air to obtain a sample A; putting the sample A and concentrated nitric acid into a hydrothermal reaction kettle; putting the hydrothermal reaction kettle into a homogeneous reactor for oxidization, cleaning the taken carbon cloth, and finally carrying out vacuum drying to obtain a sample B; putting the sample B and a silica sol solution into a reaction kettle, and carrying out reaction in a microwave hydrothermal reaction instrument; cooling a reaction system to the room temperature, and washing the sample B taken from the reaction system; finally, carrying out the vacuum drying to obtain the carbon cloth with the nanoparticle modified surface. According to the method, SiO2 nanoparticles can be evenly deposited on the surface of the carbon cloth efficiently; the prepared carbon cloth with the nanoparticle modified surface is high in surface oxygen content; the uniformity of a reticular polymer formed by a linear polymer through cross-linking action in the sulfidation process can be improved; and therefore, the carbon cloth has the superior self-lubricating property, mechanical strength and tribological property.

The invention relates to a preparation method of magnetic Fe3O4@SiO2-NH2 nanoparticles. The preparation method of the magnetic Fe3O4@SiO2-NH2 nanoparticles comprises the step of synthesizing of magnetic Fe3O4 nanoparticles, magnetic Fe3O4@SiO2 nanoparticles and the magnetic Fe3O4@SiO2-NH2 nanoparticles, wherein the magnetic Fe3O4 nanoparticles are spherical, even in particle size and good in dispersibility, the particle sizes of the magnetic Fe3O4 nanoparticles are 5-10 nm, and the heat stability is good. The magnetic Fe3O4@SiO2-NH2 nanoparticles are good in crystal structure, have unique magnetic property and can be used in various biotechnological fields such as magnetofluid, contrast agents, immunodetection, cell separation, biosensors, separation and purification of protein and nucleic acid, diagnostic reagents and enzyme immobilization.

The invention provides a modified SiO2 nanoparticle, a preparation method thereof, a nanofiber membrane containing the modified SiO2 nanoparticle, a gel electrolyte and a lithium metal battery. The modified SiO2 nanoparticle comprises an SiO2 nanoparticle and a specific ionic liquid grafted on the SiO2 nanoparticle. The nanofiber membrane is composed of a vinylidene fluoride-hexafluoropropylene copolymer and fiber consisting of the modified SiO2 nanoparticle. The gel electrolyte comprises the nanofiber membrane and a plasticizer adsorbed inside the nanofiber membrane. An electrolyte of the lithium metal battery is the gel electrolyte. According to the modified SiO2 nanoparticle provided by the invention, the mutual effect of the nanofiber membrane and the plasticizer can be strengthened, the transference number of Li+ is increased, the modified SiO2 nanoparticle is matched with the structure of the nanofiber membrane, and the ionic conductivity and specific capacity of the gel electrolyte and the cycling stability under high rate can be further improved.

The invention provides a method for enabling cement or concrete to have wave absorbing performance and a dense surface by using silicon dioxide (SiO2) coated magnetic nanoparticles. According to the method, in the presence of an externally applied magnetic field, the SiO2 coated magnetic nanoparticles are enabled to penetrate to formed cement and concrete, surfaces are enabled to be hardened, and surface layers with wave absorbing performance are formed; the SiO2 coated magnetic nanoparticles, namely MFe2O4 / SiO2 nanoparticles, are of core / shell structures, are prepared by a Stober method, are relatively small in particle size and relatively strong in magnetic properties and can fully penetrate into the surface and interior of cement and concrete; by using MFe2O4 nanoparticles and SiO2 in a composite manner, the surface of cement and concrete can be hardened and can have wave absorbing performance. The method provided by the invention can be used for carrying out surface treatment on formed cement, concrete materials or existing buildings so as to form the surface layers with wave absorbing performance, is simple in process and low in cost and is applicable to mass production and application.

The invention discloses a super-hydrophobic anti-icing and deicing coating with a photothermal effect and a preparation method thereof. The preparation method comprises the following steps: preparing melanin nanoparticles with the photothermal effect from an ink bag; carrying out hydrophobization modification on SiO2 nano particles by using perfluorodecyl triethoxy silane, so as to prepare hydrophobic SiO2 nano particles; blending melanin nanoparticles and polydimethylsiloxane to prepare a spraying solution, and then spraying the spraying solution to a substrate to prepare the photo-thermal coating; finally, spraying the hydrophobic SiO2 nanoparticle dispersion liquid on the surface of the photo-thermal coating to obtain the super-hydrophobic anti-icing coating with the photo-thermal deicing performance. The coating shows excellent photo-thermal deicing performance and super-hydrophobic ice-resistant performance. The coating can be prepared by adopting a simple spraying method, and compared with a traditional preparation method and the traditional preparation method, the preparation process is simple, the method is easy to implement, the cost is low, and the coating is suitable for being popularized and used in the industry.

The invention discloses a Fe3O4@SiO2@P4VP-PDMS-P4VP hybrid nanoparticle with pH and magnetic responsiveness and a preparation method thereof and an application of the hybrid nanoparticle in a nano oil-water separation emulsion. The Fe3O4@SiO2@P4VP-PDMS-P4VP hybrid nanoparticle is obtained by coupling reaction of a pyridine group on a P4VP block in a P4VP-PDMS-P4VP triblock copolymer with pH responsiveness with a C-I active group on the superparamagnetic iron oxide nanoparticles Fe3O4@SiO2 surface and bonding the P4VP-PDMS-P4VP triblock copolymer into the Fe3O4@SiO2 nanoparticle surface. The invention further specifically discloses the preparation method of the Fe3O4@SiO2@P4VP-PDMS-P4VP hybrid nanoparticle and the application of the Fe3O4@SiO2@P4VP-PDMS-P4VP hybrid nanoparticle in the nano oil-water separation emulsion. Due to the action of the central Fe3O4magnetic nanoparticle, the hybrid nanoparticle absorbing oil content can be easily separated from an aqueous system, and the oil absorbed hybrid nanoparticle can be recycled in an acid aqueous solution after absorption.

A composite photolytic antibacterial agent for antibacterial polymer, fiber and fabrics contains proportionally the nanoparticles of TiO2, SiO2 and Ag. It features that the TiO2 and Ag nanoparticles are wrapped by SiO2 nanoparticles to form a special porous layer.

The invention discloses a synthesizing method for silicon dioxide-silver nano-composite microspheres. The method particularly comprises the steps of preparing a Ag(NH3)2OH solution and preparing the silicon dioxide-silver nano-composite microspheres. According to the method, uniform SiO2 particles are synthesized by adopting a solution-gel method, a silver-ammonia solution and polyvinyl pyrrolidone are added, the silver-ammonia solution is reduced by ascorbic acid, and then the uniformly-dispersed dioxide-silver nano-composite microspheres are successfully prepared; by taking polyvinyl pyrrolidone as a surfactant and a dispersing agent, particle agglomeration in the silver nanoparticle synthesizing process is prevented; by loading silver nanoparticles on the surfaces of SiO2 nanoparticles, the silver using amount in the sterilizing process is decreased, and meanwhile the silver nanoparticles are prevented from being agglomerated in the catalytic process.

The invention belongs to the field of nano material preparation technology and application, and particularly relates to designing of an anti-reflection super-hydrophobic self-cleaning SiO2 nano coating and a preparation method and application of the anti-reflection super-hydrophobic self-cleaning SiO2 nano coating. The nano coating is prepared through a Czochralski method, needed instruments are simple, low in cost and automatic, and the nano coating can be prepared on a large scale and is easy for industrialization. The nano coating is composed of a bilayer nanoparticle system, the first layer is an anti-reflection coating built by small-size solid SiO2 particles, the second layer is a super-hydrophobic coating built by utilizing dendritic SiO2 nanoparticles, and the dendritic particles have hierarchical coarse structures and multiscale duct structures. The nano coating is applied to glass products, highest light transmittance can reach 96.2% which is a great increase than the light transmittance of 90.4% of original glass substrates, lowest light reflectivity can reach 2.4% which is a great decrease than the light reflectivity of 8% of the original glass substrates, and the nano coating has good super-hydrophobic self-cleaning performance.