78results about How to "Catalytic strong" patented technology

The invention discloses a carbon-loaded super-small-size precious metal nanoparticle catalyst and a preparation method. The preparation method comprises the following steps: firstly enabling commercial active carbon to be mixed with a precious metal precursor, wherein precious metal contained in the precious metal precursor is one or any two of Pt, Pd, Ru or Rh; then adding water and ethyl alcohol, and forming turbid liquid; and adequately ultrasonic-dispersing, rapidly atomizing and drying in a high temperature, finally acquiring a solid powder-like precursor; calcining the solid powder-likeprecursor in a reducing atmosphere, enabling precious metal ions adsorbed on the surface thereof to be nucleated in situ and forming super-small-size precious metal nanoparticles which are loaded on the surface of a commercial active carbon carrier, to obtain the catalyst. The method is pollution-free, and low in cost. An average diameter of the loaded precious metal nanoparticles does not exceed3 nm, and the precious metal nanoparticles are uniformly loaded on the surface of the active carbon carrier. The catalyst has a higher effective catalytic activity area and excellent catalytic capacity.

The invention discloses high-solubility compound protein powder and a preparation method thereof. Soybean protein isolate, whey protein concentrate and phospholipid are taken as main raw materials, stevia rebaudiana is processed into a stevia rebaudiana extract at low temperature, the effective ingredients and the bioactive ingredients of the stevia rebaudiana can be maximumly retained, the extraction rate is high, the flavor is pure, the color and cluster are natural, no licorice taste exists, the stevia rebaudiana extract is scientifically compounded with main materials, antifreeze polypeptides, dietary fiber flour, bee pupa hydrolysates and wheat malt powder are added, and then the compound protein powder which is appropriate in mouthfeel, good in solubility, comprehensive in nutrition, high in bioactivity and wide in suitable crowd is prepared. According to the preparation method, a non-thermal processing technique is adopted, the working efficiency is high, energy consumption is little, environmental friendliness is achieved, no pollution is generated, introduction of food additives and chemical auxiliaries is reduced, the food safety is effectively improved, the product quality is improved, the production cost is reduced, the low-carbon production objective is achieved, and large-scale and industrialized development can be achieved.

The invention discloses a drinking water deep purification method, which is economic, effective, simple and practical to prepare catalytic materials, catalyze ozonation pollutants with a catalyst and regenerate the catalytic materials. Permanganate, manganese salt, ferric salt, ferrous salt and the like are treated as raw materials, and ferric manganese compound oxide with good catalytic activity is loaded on a base body material through in situ reactions to be manufactured into a catalyst. The catalyst is applied to catalytic ozonation processes and can effectively improve removal effects of ozone on pollutants difficult to degrade in water. When the catalyst is inactivated or washed away, a simple in situ regeneration method can be used for leading active materials to be loaded and regenerated.

The invention discloses a composite protein powder capable of improving immunity and a preparation method thereof. Using soybean protein isolate, concentrated whey protein and phospholipids as main raw materials, stevia is processed into stevia extract at low temperature, which can retain Active ingredients and bioactive ingredients of stevia, high extraction rate, pure flavor, natural color, no licorice taste, scientifically compounded with main ingredients, and added antifreeze polypeptide, dietary fiber powder, bee chrysalis enzymatic hydrolyzate, wheat germ Powder, to prepare a compound protein powder with suitable taste, good solubility, comprehensive nutrition, strong biological activity, suitable for a wide range of people, and capable of improving immunity. The preparation method adopts non-thermal processing technology, which has high work efficiency, low energy consumption, environmental friendliness, no pollution, reduces the introduction of food additives and chemical additives, effectively improves food safety, improves product quality and reduces production costs , achieved the goal of low-carbon production, and can be scaled and industrialized.

The invention relates to a titania porous micro tube optical catalyst for degrading fenol in water and relative preparation. The inventive catalyst is TiO2 porous micro tube with specific structure composed from direct deposit method, that using titanic chloride as titanium source, directly hydrolyzing and depositing, in the condition with some dispersers, to be filtered, washed, dried, baked and activated to obtain final TiO2 optical catalyst containing nitrogen. The inventive catalyst has specific structure, integral appearance, and uniform aperture, thereby improving the ability for degrading fenol, with high activity in optical catalysis, the ability for degrading fenol into water and carbon dioxide, and wide application.

The invention discloses a nitrogen-doped graphene/cobaltous oxide composite material. Graphite oxide, a cobaltous acetate solution and ammonium carbonate are taken as the main raw materials, and cobaltous oxide is loaded on nitrogen-doped graphene by adopting a water bath-hydrothermal-calcining method to obtain the nitrogen-doped graphene/cobaltous oxide composite material. Compounding of nitrogen-doped graphene and cobaltous oxide is proposed initially in the invention, the obtained composite material is high in cobaltous oxide purity, and a synergistic effect between cobaltous oxide and nitrogen-doped graphene can be achieved, so that an excellent catalytic ability on a fuel cell negative electrode oxygen reduction reaction can be achieved; meanwhile, the material cost of a catalyst is greatly lowered; and the involved preparation method is simple, high in repeatability and suitable for popularization and application.

The invention discloses preparation and application of a marine biological waste oyster shell-supported palladium catalyst. Oyster shells are used as calcium, cetyltrimethylammonium bromide is used asa porogen to synthesize hydroxyapatite by a hydrothermal method, and a heterogeneous palladium catalyst which can be recycled is prepared. The preparation of the marine biological waste oyster shell-supported palladium catalyst has the following advantages that (1) the oyster shells and phosphate are used as raw materials, the oyster shells and the phosphate are low in cost, easy to obtain, widely available and environmentally friendly, and the process is simple; (2) a Heck reaction of aryl halides such as iodobenzene and bromobenzene with olefin can be can efficiently (90% or above) catalyzed, after repeated six-time use of the catalyst, the activity is almost not reduced, and the product yield is still 90% or above; (3) excellent catalytic ability is achieved on Sonogashira coupling; and (4) compared with other carrier materials, hydroxyapatite carrier materials have the significant advantages that good chemical stability, thermal stability, low solubility and adjustable surface acid and base are achieved, the structure is easy to modify, and ion exchangeability is high.

The invention discloses compound protein powder long in storage life and a production method thereof. The production method is characterized in that isolated soybean protein, concentrated whey protein and phospholipid are used as main raw materials; stevia rebaudiana is subjected to low-temperature processing to obtain stevia rebaudiana extract, so that the effective components and the bioactive components of the stevia rebaudiana can be kept to the maximum extent, high extraction rate is achieved, and the stevia rebaudiana extract is pure in flavor, natural in color and free of radix glycyrrhizae flavor; the stevia rebaudiana extract is scientifically compounded with the main raw materials and anti-freeze peptides, dietary fiber powder, honey bee pupae insect enzymatic hydrolysate and wheat malt powder are added to produce the enzymatic hydrolysate which is appropriate in taste, good in solubility, comprehensive in nutrition, high in bioactivity, widely applicable to people and long in storage life. The production method has the advantages that the non-thermal processing technology is used, and the method is high in working efficiency, low in energy consumption, environmentally friendly, free of pollution, capable of reducing the introduction of food additives and chemical auxiliaries, capable of effectively increasing food safety, capable of increasing product quality and lowering production cost, capable of achieving a low-carbon production goal and capable of achieving large-scale and industrial development.

The invention discloses a cerium-based metal organic framework derivative material with a synergistic effect with low-temperature plasma and an application method of the cerium-based metal organic framework derivative material. According to the method, the advantage that the morphological structure of a metal organic framework material (MOFs) is adjustable and controllable is utilized, a cerium-based sacrificial template (Ce-BTC) is synthesized through a room-temperature self-assembly method, then the structure and properties of the cerium-based material are modulated by controlling the roasting temperature, and the catalyst with high specific surface area and multiple pore channels is prepared. When the catalyst is applied to a plasma field, mass transfer and reaction of high-activity species and reactant molecules in the plasma field in the catalyst are facilitated, and a synergistic effect with plasma is achieved. The method has the advantages of mild preparation conditions, no need of adding other surfactants or template agents and the like, simplicity in operation, low cost and facilitation of realization of industrial large-scale production, and can be applied to the fields of volatile organic compound purification and the like under the synergistic effect with plasmas.

The invention relates to a preparation method of (S)-(+)-3,4,8,8a-tetrahydro-8a-methyl-1,6-(2H,7H)-naphthoquinone. According to the preparation method, an L-proline derivative is used as a chiral catalyst and microwave radiation is introduced into chiral preparation of the (S)-(+)-3,4,8,8a-tetrahydro-8a-methyl-1,6-(2H,7H)-naphthoquinone for the first time through asymmetric Robinson cyclization reaction under conventional conditions or microwave irradiation conditions. Under proper power, an L-prolinamide type catalyst can keep excellent catalysis performance and the catalysis reaction time isshortened; compared with room-temperature stirring conditions, the synthesis efficiency is greatly improved. The molecular collision is aggravated through the microwave radiation and an intermediatecan more easily pass through an energy barrier to form a transition state, so that the reaction time is remarkably shortened, the preparation efficiency of the (S)-(+)-3,4,8,8a-tetrahydro-8a-methyl-1,6-(2H,7H)-naphthoquinone is greatly improved and the synthesis period is shortened. The method is low in cost, simple and rapid, high in yield and good in stereoselectivity.

The invention belongs to the field of catalytic materials, and particularly relates to a copper-doped nitrogen-modified carbon material. The copper-doped nitrogen-modified carbon material is preparedby the following steps: (1) dissolving citric acid and magnesium nitrate into water, and performing drying at 80-150 DEG C to obtain a yellow solid, wherein the yellow solid is used as a precursor; and (2) uniformly grinding and mixing the precursor obtained in the step (1), melamine and a copper salt, performing a reaction for 0.5-3 h under the protection of nitrogen and a temperature of 700-1000DEG C, performing cooling to room temperature, and performing uniform grinding to obtain the Cu-N-C catalyst, that is, the copper-doped nitrogen-modified carbon material. The material provided by theinvention exhibits good catalytic ability and stronger substrate compatibility in the process of oxidizing aromatic amines by oxygen to synthesize symmetric and asymmetric azobenzenes; and the copper-doped nitrogen-modified carbon material as well as a method for synthesizing the material and a catalytic application of the material provided by the invention have important significance.

The invention belongs to the technical fields of novel nanomaterials, immunoassay and biosensing detection and provides a preparation method and application of an mHPBs-Hemin/rGO marked electrochemical immunosensor. According to the preparation method, a mesoporous hollow Prussian-blue nanocube spaced hemin functional graphene porous composite is used as a current signal amplifying mechanism and introduced into construction of the electrochemical immunosensor for the first time, a current response signal is amplified efficiently, and quantitative and sensitive detection of aflatoxin is realized. The electrochemical immunosensor is easy and convenient to operate, low in cost, high in sensitivity and wide in detection range and has important scientific significance and application value forquantitative and sensitive detection of aflatoxin.