90results about How to "Has catalytic properties" patented technology

The invention belongs to the field of catalysts, and discloses a monatomic catalyst, and a preparation method and an application thereof. The preparation method comprises the following steps: (1) synthesizing a SiO2-coated GO composite material by coating SiO2 nanospheres with graphene oxide; (2) synthesizing a SiO2-coated GO-coated PDA composite material by coating the SiO2-coated GO composite material with polydopamine; (3) synthesizing an RGO-coated NC composite material by coating reduced graphene oxide with nitrogen-doped carbon; and (4) synthesizing an RGO-coated NC/Pd monatomic catalystby loading the RGO-coated NC composite material with Pd monatoms. According to the preparation method disclosed by the invention, the overall process flow of the preparation method is set, and the reaction conditions and parameters of each key process step are improved, so that the dispersity, the catalyst activity and the cycling stability of metallic single atom can be effectively improved.

The invention relates to a method for modifying an inorganic membrane, in particular to a method for modifying a water treatment inorganic catalytic membrane. The method aims to solve the problems that an existing inorganic membrane is poor in pollution resisting capacity and has no catalytic performance. According to the method, one method comprises the steps that the inorganic membrane is soaked in pure water, is soaked in solutions after being taken out and then is taken out, and the modified inorganic membrane with the catalytic performance is obtained; the other method comprises the steps that target substances plate the function layer of the inorganic membrane on the basis of a pulse laser deposition technology, then the inorganic membrane plated with the target substances is soaked into the solutions and taken out, and the modified inorganic membrane with the pollution resisting capacity and the catalytic performance is obtained. The membrane interception rate of the obtained modified inorganic membrane can reach 99%-100%, the flux recovery rate can reach 80%-85%, and the catalytic oxidation phenol removing rate is 50%. The method is applied to the field of water treatment.

The present invention discloses a preparation method of zeolite molecular sieve membrane reactor coated with noble metal. Said preparation method includes the following steps: stainless steel tube treatment, preparing binding agent, preparing coating liquor, utilizing gas auxiliary coating technique to obtain the stainless steel tube coated with zeolite molecular sieve membrane, using tin dichloride, hydrochloric acid and deionized water to prepare sensitizing agent, using palladium chloride or chloroplatinic acid or silver nitrate, hydrochloric acid and deionized water to prepare activating agent, sensitizing and activating the stainless steel tube coated with zeolite molecular sieve membrane, mixing the solution untaining noble metal ions and complexing agent, and using ammonia water and deionized water to regulate pH, injecting plating liquor into the interior of stainless steel tube coated with zeolite molecular sieve membrane, drop-adding reduction agent to make plating, introducing hydrogen gas or nitrogen gas, baking so as to obtain the invented zeolite molecular sieve membrane reactor coated with noble metal.

The invention relates to a palladium-doped nano titanium dioxide anti-bacterial agent and a preparation method and an application thereof, belonging to the technical field of antibacterial material. The preparation method comprises the following steps: dropwise adding PdCI2 solution to the mixed solution of tetrabutyl titanate and isopropanol; after ageing, washing and drying the mixture to gel; grinding the mixture before carrying out calcination, thus obtaining the palladium-doped nano titanium dioxide anti-bacterial agent. The invention features simple production technology, high product purity, small grain diameter, good thermal stability, strong antibiotic property and can catalyze part of palladium catalytic reaction.

The invention belongs to the field of fertilizer and provides a fertilizer synergist and a preparation method and application thereof. The fertilizer synergist is prepared from, by weight, 80-90% of activated carbon and 10-20% of rare earth inorganic salt, the total weight of the components accounts for 100%. The preparation method of the fertilizer synergist comprises the following steps that an activated carbon material is smashed and screened to obtain activated carbon, the components are weighed according to the formula of the fertilizer synergist, and the activated carbon and the rare earth inorganic salt are mixed.

The invention discloses a preparation method and application of a carbon sphere/Au (copper) nanometer composite material. The preparation method comprises the following steps of firstly, preparing a carbon sphere, modifying the surface of the carbon sphere by PDDA (poly diallyldimethylammonium chloride), enabling the surface of the carbon sphere to carry positive charges, and utilizing electrostatic attraction to uniformly and quickly adsorb AuC14<-> onto the surface of the carbon sphere in the heating and stirring process with an H2O and DMF mixed solvent; finally, under the protection action of PVP (polyvinylpyrrolidone), using N,N-DMF (N,N-dimethylformamide) as a reduction agent, enabling Au to grow along a particular crystal face, and further reducing in situ in one step, so as to obtain the uniformly loaded carbon sphere/Au nanometer composite material. Compared with the prior art, the preparation method has the advantages that a gold nanoparticle is loaded by using the green, low-price and easily-synthetic carbon sphere as a substrate, the reaction time is short, the operation is simple and convenient, and the repeatability is high; by changing the adding amount of HAuC14, the carbon sphere/Au nanometer composite material with controllable loading amount is obtained; the carbon sphere/Au nanometer composite material has catalyzing property, and especially has excellent catalyzing property on the reduction of 4-nitrophenol.

The invention provides a catalytic purification composite material and a preparation method and application thereof. Activated carbon loaded manganese sand particles are used as a basic framework of the material, and mixed metal oxides as active components are loaded on the outermost layer of the framework. The preparation method of the material comprises the following steps: pretreating manganese sand and removing impurities on the surface of the manganese sand; taking wooden activated carbon or shell activated carbon as an activated carbon precursor; roasting in an inert atmosphere; preparing a porous carbon structure which uses the manganese sand as a framework; and modifying the surface of the manganese sand-porous carbon structure by using the metal oxides to form the novel composite purification material with adsorption and electro-catalyst composite functions. When the catalytic purification composite material is used, the composite material effectively adsorbs and catches low-concentration organic matters in micro-polluted raw water at first, so that pollutants are adsorbed on the surface of the material, then the composite material with adsorption saturation is guided into an electrolytic bath for electrochemical oxidation, the pollutants on the surface of the composite material are desorbed and decomposed, and are thoroughly mineralized into carbon dioxide and water, and meanwhile, recycling of the composite material is realized.

The invention provides a method for preparing a nano-nickel/carbon fiber (Ni/CF) catalyst from a chemical nickel-plating waste liquid. The method comprises the following steps: on the basis of taking a conductive CF as a matrix material, and covalent-grafting ethylenediamine (EDA) on the conductive CF by a potentiostatic method so as to obtain an EDA/CF composite material; then grafting ethylenediamine tetra-oxaloacetic acid on the EDA/CF composite material by virtue of amido reaction, and then adding tripolycyanamide and formaldehyde so as to obtain chelate resin/EDA/CF by virtue of polymerization reaction; and placing the obtained chelate resin/EDA/CF in the chemical nickel-plating waste liquid to adsorb nickel ions, and reducing the nickel ions in situ by an electrochemical process so as to finally obtain the nano-Ni/CF catalyst. The method provided by the invention has the advantages of lowering the energy consumption, simplifying the processing steps, improving the added value ofa product and establishing a new approach for effective resource utilization of the chemical nickel-plating waste liquid, thus having higher economic value and higher environmental protection value.

The invention relates to a preparation method of a TiO2 quantum dot nano-material and relevant products. The TiO2 quantum dot nano-material is prepared from absolute ethyl alcohol, TiCl4 and benzyl alcohol under nitrogen protection. The preparation process is simple, obtained nanometer titania particles are uniform, the size is about 10 nm, and the nanometer titania particles are the nano-material which has a catalytic characteristic and can stably exist. Prepared nanometer titania can be widely applied to multiple technical fields of catalysis, nano-energy, composites, adsorption materials and the like.

The invention relates to a gypsum product with photocatalytic activity and an application thereof. Titanium white gypsum produced by utilizing a sulfuric acid method of a titanium white plant is taken as a raw material for converting the titanium white gypsum into semi-hydrated gypsum, so that strength of the gypsum is increased; a qualified building block or a plate material with waterproof performance is manufactured by adding a waterproof agent, a retarder and a foaming agent, and an exterior-wall thermal insulation layer is prepared by adding the foaming agent. Catalytic oxidization ability of titanium dioxide and iron oxide in the titanium white gypsum is utilized, so that catalytic activity of the gypsum after adding natural iron ore is strengthened, and therefore, the semi-hydrated gypsum can be used for degrading toxic organic pollutants of a building material in the sun or the visible light.

The invention discloses a preparation method and application of a MnOOH/Ag nano-composite material. The preparation method is characterized by comprising the steps of decorating the surface of MnOOH with polystyrene sodium sulfonate (PSS) by adopting HCHO or hydrazine hydrate as a reducing agent, and uniformly and rapidly adsorbing Ag<+1> onto the surface of MnOOH in the stirring process; adding the reducing agent under the protection of PVP, enabling Ag to grow along a specific crystal plane, and carrying out in-situ reduction on the Ag in one step to obtain the MnOOH/Ag nano-sheet composite material with novel morphology. Compared with the prior art, the preparation method has the advantages that the method is carried out under a normal temperature condition, the reaction time is relatively short, the operation is simple, and the repeatability is relatively high. By changing the type of the reducing agent, the MnOOH/Ag nano-composite material with different morphologies can be obtained. The prepared MnOOH/Ag nano-composite material has catalytic performance and has excellent catalytic performance of catalytically reducing 4-nitrophenol.

The invention provides a preparation method of inorganic biological composite nano-catalyst Au@A beta 2535. The preparation method includes steps of 1, preparing polypeptide solution dispersed by hexafluoroisopropanol; 2, preparing polypeptide powder; 3, preparing polypeptide solution; 4, preparing catalyst Au@A beta 2535. The preparation method is simple and moderate; the prepared gold/ polypeptide inorganic biological composite nano-catalyst is uniform and controllable in structure, and good in catalytic effect; meanwhile, the solution and polypeptide form can be changed; different forms of catalysts with different catalytic rates can be prepared.

The invention discloses biomass granular fuel, which is prepared from the following components: sawdust, crop straw, a corncob, rice hull powder, attapulgite clay, montmorillonite and red mud. The biomass granular fuel provided by the invention is reasonable in componential compatibility; the slagging phenomenon of a present biomass granular fuel is greatly ameliorated; the emission of pollution gas is greatly reduced and the combustion rate of the biomass granular fuel is improved.

The invention discloses a method for preparing a porous adsorption material by a magnetic control nano motor cluster gel method. The method comprises the following steps: adding an alcohol-acid organic mixture into 700-1500 DEG C smelting slag, sufficiently mixing and reacting, uniformly mixing the reaction solution and a silicon-coated magnetic micro-nano particle solution after the reaction is completed, adding the mixture into a surfactant solution, and in the presence of a magnetic field, reacting for 0.5-24 hours at the temperature of 80-180 DEG C, aging for 16-24 hours from the room temperature to 30 DEG C, collecting solids, heating and drying to obtain the porous adsorption material. The method overcomes the problems of low utilization rate of slag, single function of preparing the adsorption material and low adsorption capacity at present, realizes maximum utilization of solid waste resources, and has good environmental benefits, social benefits and economic benefits.

The invention relates to a preparation method for a disubstituted styrene derivative. The objective of the invention is to solve the problems of complicated steps, low yield and pollution to the environment for a conventional method for synthesizing the disubstituted styrene derivative. The preparation method provided by the invention comprises the following steps: dissolving a styrene derivative,an aniline compound, a diphenyl diselenide compound and a photocatalyst into an organic solvent at room temperature under a nitrogen or oxygen atmosphere, carrying out uniform mixing, placing an obtained mixture under blue LEDs lamps for a reaction, after the reaction is completed, carrying out rotary evaporation to remove a solvent, and carrying out separation and purification so as to obtain the disubstituted styrene derivative. The invention provides a simple one-step synthetic method. The method provided by the invention solves the problems of the need of heating for conventional synthesis, low yield caused by a transition metal catalyst system and poor environmental friendliness of a method, and seeks a synthetic route with greenness, high efficiency, mild conditions, simple method and convenient operation. The preparation method provided by the invention is applied to the field of organic synthesis.

The invention relates to a method for preparing continuous SiO2/nanocrystalline metal aerogel fiber with catalytic performance by adding nanocrystalline metal in situ. The method comprises the steps that salicate is prepared into a spinning solution, then, a nanocrystalline metal catalyst is added into the spinning solution, the spinning solution is added into coagulating bath, reaction wet spinning is conducted, orthosilicic acid/silicate fiber containing the nanocrystalline metal catalyst is obtained, winding and room temperature ageing are conducted, the orthosilicic acid/silicate fiber is washed to be neutral through deionized water, solvent replacement is conducted through deionized water or ethyl alcohol, drying is conducted, and the continuous SiO2/nanocrystalline metal aerogel fiber is obtained. The method has the advantages that raw materials are low in price and easy to obtain, the reaction process is simple, and spinnability is good. The continuous SiO2/nanocrystalline metal aerogel fiber with catalytic performance prepared through the method has abundant holes, and is high in specific surface area, and resistant to high temperature and chemical corrosion; the specific surface area of the fiber and the content of nanocrystalline metal in the fiber are adjustable, and the method has application prospects in catalysis and other fields.