590 results about "Alkyl trimethyl ammonium bromide" patented technology

The invention discloses a preparation method of a graphene-carbon nanotube compound film based on a three-dimensional network appearance. The method comprises the step of: transferring and stamping graphene and a carbon nanotube onto glass, a tantalum sheet, a silicon chip, a stainless steel plate or a polyethylene glycol terephthalate substrate in the mass ratio (1-10):1 through spraying deposition or vacuum suction filtration, wherein the grapheme is graphene oxide prepared by using an improved Hummers method; and a preparation method of a carbon nanotube solution comprises the following steps of: mixing acids; dispersing surfactants such as sodium lauryl sulfate, sodium dodecyl benzene sulfonate and hexadecyl trimethyl ammonium bromide in an auxiliary way, and the like. The graphene-carbon nanotube compound film prepared by adopting the method has the advantages of adjustable transmission and surface resistance, high uniformity, high stability, simple preparation method process and the like, and can be loaded on a rigid substrate as well as a flexible substrate.

The invention discloses a preparation method of an alumina carrier with a composite pore structure, which comprises the steps of mixing and roasting an aluminum-contained compound and a composite template, wherein the composite template comprises a mesoporous template selected from at least one of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock polymer, polyethylene glycol, dodecylamine, hexadecyl trimethyl ammonium bromide, lauric acid, stearic acid and fatty alcohol polyoxyethylene ether and a macroporous particulate template selected from polystyrene microspheres with the particle size of greater than 50nm, polymethyl methacrylate microspheres, biomaterial particles, asphalt particles or heavy oil residues; and the weight ratio of the mesoporous template to the macroporous particulate template to the aluminum-contained compound (by alumina) is 0.1-2:0.1-0.7:1. The invention also discloses the alumina carrier simultaneously having mesoporous tunnels and macroporous tunnels prepared through the method, wherein mesopores account for 40-90% of the total pore volume, and macropores account for 10-60% of the total pore volume.

The invention relates to a preparation method of a few-layer MoS2/graphene electrochemical storage lithium composite electrode. The preparation method comprises the following steps of: ultrasonically dispersing graphene oxide in de-ionized water; adding octaalkyl trimethyl ammonium bromide cationic surfactant, then adding ammonium thiomolybdate and dropwise adding hydrazine hydrate with stirring; performing reflow reaction at 95 DEG C to reduce the ammonium thiomolybdate and graphene oxide into MoS2 and graphene at the same time respectively; centrifugally collecting a solid product; washing with de-ionized water; drying; thermally treating in a nitrogen/hydrogen mixed atmosphere to obtain the few-layer (two to four layers) MoS2/graphene composite nanomaterial; mixing the few-layer MoS2 and graphene composite nanomaterial and acetylene black as well as polyvinylidene fluoride into paste; and coating on a copper foil for rolling. The method provided by the invention has a simple process, and an organic solvent is not consumed. The few-layer MoS2/graphene composite material is used as the electrochemical storage lithium composite electrode and has high electrochemical storage lithium specific capacity, superior circulation performance and superior high-power charging and discharging characteristic.

The invention relates to a catalytic material of a composite molecular sieve containing micropore Y-zeolite phase and mediated hole MCM- 48 phase, which is produced by taking mixed cationic and non-ion surfactant as template; the invention also relates to a preparation method of the catalytic material. By adopting a method of overgrowth and employing mixed aqueous solution of cationic surfactant: cetylíítrimethyl ammonium bromide(CTAB) and nonionic surfactant: p -octyl polyethylene phenyl ether OP-10 as template, under the alkaline hydrothermal condition the invention synthesizes composite molecular sieve which is provided with Y/MCM-48 with micropore and two-mode mediated holes. The framework ratio Si/Al of microporous phase Y-zeolite of the composite molecular sieve is higher than traditional Y-zeolite, and the ratio Si/Al and the content of the framework of microporous phase can be adjusted by changing synthesis conditions. The method of the invention has simple operation and good repeatability, which provides with optional materials for developing novel catalyst with industrial application prospect, and the synthesis has practical application value.

The invention relates to an inorganic porous material synthesis technology field, and concretely relates to a method for preparing hollow mesoporous lamella spherical silica material. In a mixed solvent of alcohol and water, under the catalytic action of ammonia, using a cationic surface active agent of cetyl trimethyl ammonium bromide as a mesoporous template, the inorganic silicon material self-assembles to be mesoporous uniform spheres on the polyphenylacetylene sphere surface, the surface active agent and the polyphenylacetylene sphere are deprived in high temperature environment, the hollow silica spheres with uniform size from micron to millimeter and mesoporous lamella are obtained. The specific surface area of the obtained hollow silica sphere is 800-2000m<2>/g, the bore diameter is 1.8-3.5nm, and the bore volume is 0.5-0.8 ml/g.

The invention belongs to the field of synthesis of nano materials, relates to the preparation of graphene/mesoporous oxide series of nano composite material, and particularly relates to a preparation method and application of graphene/cellulose/titanium dioxide composite material. The graphene/cellulose/titanium dioxide composite material is prepared by preparing graphite oxide by utilizing an improved Hummers method, carrying out ultrasound to obtain graphene oxide, reducing graphene oxide into graphene by using sodium borohydride; and finally uniformly mixing cellulose, titanium dioxide, a surface active agent (hexadecyl trimethyl ammonium bromide) and grephene. According to the invention, the synthesis method is simple, the prepared graphene/cellulose/titanium dioxide composite material is taken as an adsorbent, and a malachite green dye solution is taken as an adsorption object, the experiment shows that the composite material has an excellent adsorption removal effect. The composite material is applied to the treatment of dyes in sewage water, has the advantages of simplicity in operation, convenience, easiness in availability, high adsorption rate and the like, and has good industrially practical value.

The invention belongs to the technical field of trace amount detection, in particular relates to a method that surfaces functionalized nanogold particles are used for potential fingerprint appearance. The invention provides the method that the different surface functionalized nanogold particles (probe) are used for the potential fingerprint appearance. The particles are the hydrophobixated nanogold particles decorated by alkyl hydrosulfide, the hydrophobixated nanogold particles protected by surface active agent cetane trimethyl ammonium bromide (CTAB), the water-soluble nanogold particles protected by the CTAB and the water-soluble nanogold particles protected by L-cysteine respectively. The probe and the ingredients in the residual sweat in the potential fingerprint generate the absorption and static functions or the condensation reaction, then an argentation is utilized to lead potential fingerprint samples to colorate in the argentation liquid, the nanogold particle signals for the ingredient identification in the fingerprint are magnified and the reduced argentum particles deposite at the grain position of the fingerprint samples to further present black, thereby forming the clear fingerprint image that can be observed by naked eyes. The method is simple, fast and high in sensitivity and has no harmful side effects.

The invention provides a gold nanoparticle triangular plate preparing method and a method for preparing gold nanoparticle discs and gold nanoparticle hexagonal pieces on the basis of the gold nanoparticle triangular plate preparing method, relates to the technical field of gold nanoparticle preparing, and aims at providing the method which is easy and convenient to operate, high in repeatability and efficiency and is used for preparing gold nanoparticle triangular plates, gold nanoparticle discs and gold nanoparticle hexagonal pieces. The gold nanoparticle triangular plate preparing method includes the steps of preparing a gold nanoparticle seed solution through a sodium citrate aqueous solution, a tetrachloroauric acid aqueous solution and a sodium borohydride aqueous solution, preparing a gold nanoparticle triangular plate solution through the preapraed seed solution, a cetyl trimethyl ammonium bromide aqueous solution, a tetrachloroauric acid aqueous solution, a potassium iodide or sodium iodide aqueous solution, a sodium hydroxide aqueous solution and a ascorbic acid aqueous solution, and obtaining gold nanoparticle triangular plates after the liquid supermatant is abandoned. The method is easy and convenient to operate and high in repeatability and controllability, the prepared gold nanoparticle plates are unified in size, gold nanoparticle plates of different types and sizes can be synthesized, and the purity reaches 95% or higher.

The invention relates to a gemini anion surfactant and a preparation method thereof. The surfactant has two synthesis routes: one is alkylated reaction which uses bromoalkane and diphenyl ether as raw materials to produce intermediate alkyl diphenyl ether under the catalysis of lewis acid AlCl3; the other is phase transfer catalytic reaction which uses alkylphenol and oxygen ether vinylicus as raw materials to produce alkylphenol oxygen ether vinylicus under the catalysis of the phase transfer catalyst of hexadecyl trimethyl ammonium bromide. Sulfonation and neutralization are conducted to the produced intermediate to acquire Gemini anion surfactant. With good surface activity, the surfactant has good synergistic effect with other surfactants, and can be widely applied in tertiary recovery.

The invention provides a preparation method for a hierarchical porous ZSM-5 molecular sieve. According to the preparation method for the hierarchical porous ZSM-5 molecular sieve, in a synthesis system of a silicon source, an aluminum source, an organic structure directing agent and deionized water, a proper amount of cationic surfactant cetyl trimethyl ammonium bromide is added to serve as a softtemplate agent, full stirring and uniform mixing are carried out so as to form molecular sieve synthesis sol-gel, then the sol-gel is dried so as to obtain dry glue, and then the hierarchical porousZSM-5 molecular sieve is prepared by using a dry glue conversion method. The preparation method for the hierarchical porous ZSM-5 molecular sieve has the advantages of being mild in preparation conditions, simple, convenient to use, high in efficiency, free of emission of synthetic waste liquid, environmentally friendly and capable of realizing industrial production, the good catalytic performanceis realized in the reaction of preparing the low-carbon olefins through catalytic cracking of n-octane, and therefore, remarkable environmental benefits and economic benefits can be achieved, and theindustrial production prospect is good.

The invention discloses a preparation method of hollow titanium dioxide microspheres. The invention is realized through the following technical scheme: first preparing polymer microspheres through using a method of soap-free emulsion polymerization and using styrene as a monomer, methyl acrylic acid as a comonomer, deionized water as a reaction medium, and potassium persulfate as an initiator; forming an emulsion through ultrasonic dispersion of the prepared polymer microspheres, cationic surfactant cetyl trimethyl ammonium bromide, absolute ethyl alcohol, and the deionized water; adding a mixed solution of ethanol, butyl titanate and triethylamine, obtaining core shell particles through reflux reaction for 4 hours at 50 DEG C with mechanical stirring, and finally obtaining the hollow titanium dioxide microspheres through calcining. According to the preparation method, the triethylamine is used as an inhibitor, titanium dioxide smoothly and uniformly coats surfaces of the polymer microspheres through control of hydrolysis rate of the butyl titanate, and the hollow titanium dioxide microspheres with a higher yield are obtained.

The invention discloses a heterojunction material formed by supporting a single-layer Bi2WO6 nanosheet on a g-C3N4 (Graphite-phase C3N4) nanosheet as well as a preparation method and an application of the heterojunction material. Adopting the single-layer Bi2WO6 nanosheet modified g-C3N4 nanosheet as a supporter, the heterojunction material is of a hierarchical sheet structure. The preparation method of the heterojunction material comprises the steps of adding the g-C3N4 nanosheet and cetyl trimethyl ammonium bromide to a Bi(NO3)3.5H2O solution, then adding a Na2WO4.2H2O solution, and performing a hydrothermal reaction on the obtained mixed solution to obtain the heterojunction material. The heterojunction material has the advantages of being high in photocatalytic activity, stable, recyclable and the like, and the preparation method of the heterojunction material has the advantages that operation is simple and convenient, raw material cost is low, energy consumption is low and the like. The heterojunction material can be used for degrading antibiotics in wastewater and has the advantages that the degradation effect is good, the application method is simple and easy to operate and the like.

The invention belongs to the field of lithium ion battery silicon-carbon anode materials, and discloses a silicon-carbon composite material and a preparation method thereof, and application of a silicon-carbon composite material. The preparation method of the silicon-carbon composite material comprises the following steps of: (1) uniformly mixing metal magnesium powder, diatomite powder and a moderator, then performing redox reaction, cooling, washing and drying to obtain a silicon-based material; (2) dispersing a silicon-based material in a solvent, adding an alkaline catalyst and tetraethoxysilane, performing stirring for reaction, washing and drying to obtain a silicon dioxide-coated silicon-based material; (3) dispersing the silicon dioxide coated silicon-based material in water, adding cetyl trimethyl ammonium bromide and an alkaline catalyst for uniform stirring, adding the mixture into resorcinol and formaldehyde, performing stirring for reaction, washing, drying, and calciningat a high temperature to obtain the carbon and silicon dioxide coated silicon-based material; and (4) etching the carbon and silicon dioxide coated silicon-based material. The silicon-carbon compositematerial provided by the invention has a good electrochemical performance and high reversible specific capacity.

The invention relates to a nano-composite molecular sieve and a preparing method thereof. Silica sol and sodium metaaluminate are taken as silicon source and aluminum source respectively, and step-by-step synthesis of crystallization is adopted by utilizing surfactant hexadecyl trimethyl ammonium bromide (CATB) and tetraethyl ammonium hydroxide (TEAOH) used for synthesizing a porous Beta molecular sieve as a template agent; in the first step of crystallization, an additive is added for controlling the solvent of the silicon source and the aluminum source to synthesize nano Beta latex; low-temperature dynamic crystallization is adopted in the second step; at the temperature of 30 to 40 DEG C, a composite molecular sieve is synthesized; finally a Beta/MCM-41nano-composite molecular sieve with grain size being 50 to 100 nanometers is produced after the processing steps of filtering, washing, drying and roasting.

The invention discloses a single-layer bismuth tungstate nano-sheet composite photocatalyst modified by carbon quantum dots, a preparation method of photocatalyst and an application. The composite photocatalyst comprises single-layer bismuth tungstate nano-sheets and the carbon quantum dots, the single-layer bismuth tungstate nano-sheets are modified by the carbon quantum dots, and the weight ratio of the carbon quantum dots to the single-layer bismuth tungstate nano-sheets is 0.03-0.05:1. The carbon quantum dots, hexadecyl trimethyl ammonium bromide, bismuth nitrate solution and sodium tungstate solution are mixed and react in a hydrothermal manner to obtain the composite photocatalyst. The composite photocatalyst has the advantages of wide visible light response range, high degradation efficiency, good photocatalyst stability and reusable performance and the like. The preparation method of the photocatalyst has the advantages that the preparation method is simple and convenient to operate, low in raw material cost and less in energy consumption, large-scale preparation can be achieved and the like. The composite photocatalyst belongs to green synthetic technique and can be used for treating antibiotic wastewater.

The invention discloses a method for preparing two-dimensional silver nanosheets of different shapes. Firstly, a silver mirror reaction is adopted, glucose serves as a reducing agent, a quantitative silver-ammonia solution and the quantitative glucose solution are sequentially added into a beaker to be mixed, then cetyl trimethyl ammonium bromide serves as a surface active agent, the cetyl trimethyl ammonium bromide solution is added into the mixed solution, then high-temperature reaction is carried out on the mixed solution, and a solution of the two-dimensional silver nanosheets of the different shapes is prepared by adjusting the concentration ratio of the cetyl trimethyl ammonium bromide solution and the silver-ammonia solution. The method has the advantages that operation is easy, cost is low, equipment is simple, and the prepared silver nanosheets are uniform in grain size, good in water solubility and free of obvious gathering.

The present invention provides one kind of cuboidal nanometer Pd material and its preparation process. The preparation process includes the following steps: mixing 10 mM concentration water solution of chloropalladic acid and 12.5-25 mM concentration water solution of ammonium hexadecyl trimethyl bride in the volume ratio of 1 to 20, heating to 65-95 deg.c, adding 100 mM concentration water solution of ascorbic acid in the volume ratio to the water solution of chloropalladic acid of 0.16 to 1 to react for 30 min, centrifugal separation to collect precipitate, water washing, and drying to obtain cuboidal nanometer Pd material. The process is simple, and the prepared cuboidal nanometer Pd material is used in catalyzing, preparing nanometer material and other fields.

The invention relates to a silver loaded mesoporous silicon oxide coated ternary cathode material, and a preparation method and applications thereof. The preparation method comprises the following steps: dissolving lithium salts, nickel salts, cobalt salts, and manganese salts into a uniform medium, wetting the mixture by two chelating agents, adding ammonia liquor, adding a solution of two chelating agents into the inorganic salt uniform medium, heating the mixture under stirring to prepare dry gel; grinding the dry gel into powder, calcining the powder to obtain a ternary material; adding a water solution of the ternary material into tetraethyl orthosilicate, ethanol, and surfactant (cetyl trimethyl ammonium bromide), carrying out centrifugal precipitation, drying the precipitates, calcining the precipitates to obtain a silica-ternary shell-core cathode material; dissolving silver oxide into water to obtain a solution A; dissolving PVP into water to prepare a solution B; dropwise adding the solution B into the solution A to obtain a solution C; adding the silica-ternary shell-core cathode material into the solution C to obtain a solution D; dropwise adding a reducing agent into the solution D, and finally carrying out washing, suction filtration, and drying to obtain the final product. The preparation method is simple, the technological conditions are easy to realize, the energy consumption is low, and the preparation is pollution-free.

The invention relates to a method for preparing a cerium oxide nanometer slice, which belongs to the technical field of the preparation of inorganic nanometer materials, and comprises the main steps as follows: (1) the preparation of a cerium salt mixture liquor: chemometry cerium salt of 0.3-1.0mmol and hexadecyl trimethyl ammonium bromide are dissolved by using an appropriate amount of deionized water and made into a mixture liquor; (2) hydro-thermal reaction: the obtained mixture liquor is added with an appropriate amount of ammonia and subjected to ultrasonic dispersion, and then hydro-thermal reaction is carried out for 1-3 days at the temperature of 100-180 DEG C; afterwards, centrifuge separation is carried out, the obtained precipitate is washed by using deionized water so as to lead the pH value to be 7 and neutral, and then drying is carried out at 60 DEG C so as to obtain the cerium oxide nanometer slice. The shape of the cerium oxide nanometer slice obtained by the method is square, or rhombus, or hexagon, with the size of 20-80nm and the thickness of 3-5nm.

The invention provides a preparation method of a zinc oxide nanorod/g-C3N4 nanosheet composite photocatalyst material. The zinc oxide nanorod/g-C3N4 nanosheet composite photocatalyst material is prepared by adopting melamine, zinc acetate dehydrate, sodium hydroxide, hexadecyltrimethyl ammonium bromide and absolute ethyl alcohol as main raw materials through a hydro-thermal synthesis method; zinc oxide in the composite material is a one-dimensional zinc oxide nanorod with uniform morphology; the morphology of g-C3N4 is a two-dimensional nanosheet structure. The product respectively degrades an organic pollutant rhodamine B under simulated sunlight and visible light (lambda is larger than 420nm), so that the photocatalyst material is proved to have an excellent photocatalytic performance. The morphology and the size of the zinc oxide nanorod prepared by the method are uniform, and the thickness of the g-C3N4 nanosheet is less, so that the zinc oxide nanorod and the g-C3N4 nanosheet are tightly combined, the migration of photo-induced electron is facilitated, and the photocatalysis efficiency is improved. The material has good response in ultraviolet and visible light areas, so that the material not only has a better application prospect on the environmental protection field such as water pollution control, but also has a better development prospect on developing and utilizing renewable resources such as solar energy.

A high-performance chemical-structured modified emulsified binding water-proofing material for bituminized bridging floor takes AH-90# petroleum asphalt and water as main raw material in proportion of 1.2-1.8, and it takes cation surface activator 1631 and 1831 and cocoanut oil propylene bisamine and OPin proportion of 4:5:4:3, it selects SBS and SBR latex in proportion of 3.5:1.5 as chemical modified mother, and it uses epoxy-resin emulsion as additive. It has better binding ability, excellent low and high-temperature resistances and no environmental pollution.

The invention discloses a composite material with a high conductivity intercalation structure and a preparation method thereof, namely a method for preparing a polypyrrole/graphite oxide composite material. The preparation method comprises the following steps: (1) firstly, dispersing the graphite oxide in a hydrochloric acid aqueous solution with pH of between 1 and 3, adding a surface active agent, namely hexadecyl trimethyl ammonium bromide into the mixed solution, carrying out ultrasonic treatment for 30 to 60 minutes at room temperature to obtain a colloidal dispersion solution; and (2) adding a pyrrole monomer into the colloidal dispersion solution of the step (1), under magnetic stirring, adding ammonium persulfate into the mixed solution, carrying out emulsion polymerization for 3 to 24 hours at a temperature of between 0 and 5 DEG C, filtering the product, washing the product by acetone and deionized water, and drying the product to obtain the polypyrrole/graphite oxide composite material with the high conductivity intercalation structure.

The present invention relates to a preparation method of mesohole Ce 0.8 Zr 0.2 O2 powder body with nano structure and CuO/Ce0.8 Zr0.2 O2 catalyst and its application for catalyzing CO low-temperature oxidation. It is characterized by that it uses cationic surfactant cetyltrimethyl ammonium bromide (CTAB) as template agent, and adopts a simple one-step process to prepare mesohole nano Ce 0.8 Zr 0.2 O2 powder body which can be used a high-activity catalyst carrier and CuO/Ce 0.8 Zr 0.2 O2 catalyst.

The invention relates to a method for preparing a flower-shaped copper sulfide (CuS) nanocrystal, which comprises the following steps of: dissolving a dissoluble copper salt into deionized water to obtain a solution A; adding sulfourea into the solution A to obtain a solution B; adding hexadecyl trimethyl ammonium bromide into the solution B to form a precursor solution C; pouring the precursor solution C into a microwave hydrothermal reaction kettle, sealing the reaction kettle, putting the reaction kettle into a temperature and pressure dual-control microwave hydrothermal reactor, and carrying out natural cooling to room temperature after the reaction is finished; and opening the hydrothermal reaction kettle, carrying out centrifugal collection on a product, then, washing the production by respectively using deionized water and absolute alcohol, and drying to obtain the flower-shaped copper sulfide nanocrystal. According to the method for preparing the flower-shaped copper sulfide nanocrystal, flower-shaped copper sulfide nanocrystals with different grain sizes are prepared through changing the concentration of an added surfactant, i.e. the hexadecyl trimethyl ammonium bromide, the grain size controllable preparation of the flower-shaped copper sulfide nanocrystals is achieved, and then, copper sulfide semiconductor materials with different optical and electrical properties are prepared; and CuS grains prepared by the method are of a flower-shaped structure formed by assembling flake-shaped crystals with the thickness of 20-50 nm, so that the CuS grains have larger surface areas and can be applied to the catalytic field.

The invention discloses a method for preparing a comby stannous oxide nanometer material. The method comprises the following steps of: putting stannous chloride dehydrate in a hexadecyl trimethyl ammonium bromide aqueous solution under the condition of stirring by adopting a hydro-thermal synthesis method to obtain a mixed solution; then, dropwise adding a sodium hydroxide aqueous solution to the mixed solution; stirring to obtain a final mixed solution, wherein in the final mixed solution, the molar concentration of the stannous chloride dehydrate is controlled to be between 0.10mol/L and 0.15mol/L, and the molar ratio of the stannous chloride dehydrate to hexadecyl trimethyl ammonium bromide to sodium hydroxide is 1:1:(2-4); putting the final mixed solution in a reaction kettle, wherein the degree of filling is 80-90 percent, and performing a hydrothermal reaction for 12-15h at the temperature of 120-160 DEG C; and performing centrifugation, washing and drying on the obtained product to prepare the comby stannous oxide nanometer material. The prepared comby stannous oxide nanometer material has an even porous structure and can be applied in the aspects of lithium ion battery anode materials, chemical synthesis catalysts and the like. The method disclosed by the invention has the characteristics that the operation is simple, the cost is low, the pollution is low and industrial large-scale production can be easily realized.