88results about How to "Increase catalytic rate" patented technology

The invention discloses a hydrogen storage material hydrolysis and hydrogen releasing system taking a monodispersed or supported phosphorus-containing metal compound as a catalyst. The system comprises a hydrogen storage material and water, and further comprises a catalyst, wherein the catalyst is one or multiple of a monodispersed multi-metal phosphide, a supported multi-metal phosphide, a monodispersed single-metal and multi-non-metal phosphorus-containing compound, a supported single-metal and multi-non-metal phosphorus-containing compound, a monodispersed multi-metal multi-non-metal phosphorus-containing compound and a supported multi-metal multi-non-metal phosphorus-containing compound. Alkali is added into an aqueous solution of the monodispersed or supported phosphorus-containing metal to improve the catalytic rate of the catalyst and shorten the induction period. The catalysis efficiency of the supported catalyst is higher than that of the monodispersed catalyst. The system provides a batch of efficient novel catalysts for hydrolysis and hydrogen releasing of the hydrogen storage material, and provides a method for increasing the hydrolysis rate of the hydrogen storage material under the catalysis of the phosphorus-containing metal compound.

The invention discloses a hydrogen storage material decomposing and hydrogen release system. The system comprises a hydrogen storage material, a catalyst and a solvent, wherein the catalyst is a mixture of two or more of metal compounds mixed in any proportion. The invention provides the cheap and stable catalytic hydrogen storage material decomposing and hydrogen release system, and the raw materials for catalyst preparation are cheap. The catalyst has stable properties and high hydrogen release efficiency when applied to catalysis of a hydrogen storage material; the catalytic hydrogen release system is heterogeneous catalytic reaction, and the catalyst is convenient to recycle; if the catalytic hydrogen release system is conducted in an organic solvent, the catalytic reaction can be conducted at a temperature of 273 K or lower; in the catalytic hydrogen release system, when the hydrogen storage material is ammonia borane and methanol is used as a solvent, ammonia borane can be obtained again from NH4B(OCH3)4 obtained after alcoholysis under certain conditions.

The invention discloses a porous organic polymer containing bidentate phosphoramidite ligands, as well as a preparation method and application thereof. The polymer has a general formula as shown in the specification, and is prepared from compounds through polymerization. After being formed from the porous organic polymer containing bidentate phosphoramidite ligands and transition metal salt, a catalyst can be used in hydroformylation of terminal olefin and isomerization-hydroformylation reaction of nonterminal olefin, has high catalyzing speed and good selectivity and cyclicity, and has practical values.

The invention discloses a Co-B/NGO composite nanometer material. The Co-B/NGO composite nanometer material is prepared by firstly performing in-site reduction on nitrogen-doped graphene and inorganiccobalt salt through sodium borohydride and then performing freezing-drying, the specific area is 40-100 m<2>g<-1>; the material is magnetic, and can be attracted by a magnet. When the composite nanometer material is used as a catalyst for hydroboron hydrogen generation by hydrolysis, the hydrogen desorption rate is 500-1700mL/min<-1>g<-1>, and the hydrogen production rate is 100%; the material canbe adsorbed and recycled by the magnet, the recycling rate reaches 99.5%, and the hydrogen production rate after being circulated is maintained at 100-1530mL min<-1>g<-1>, namely, maintaining 50-85%of the initial hydrogen production rate. The preparation method comprises the following steps: 1) precursor preparation: adding nitrogen-doped graphene and inorganic cobalt salt in an aqueous solutionfor ultrasonic dispersion mixing, reducing by using sodium borohydride, and finally centrifuging and washing to obtain a precursor; 2) preparation of the Co-B/NGO composite nanometer material: freeze-drying the precursor to obtain the Co-B/NGO composite nanometer material. The Co-B/NGO composite nanometer material disclosed by the invention is simple in preparation, has more excellent catalysis performance, and has an extensive application prospect in the application field of the hydroboron hydrogen generation by hydrolysis.

The invention provides a preparation method of a PVP modified prussian blue nanometer material. The method concretely comprises the following steps of (1) dissolving PVP and precursors into water formixing; (2) adding hydrochloric acid for regulating the pH to an acid state; (3) performing reaction under the electromagnetic induction heating; (4) performing ethanol water centrifugal washing, dialysis and freeze drying to obtain a finished product. According to the method, magnetic inner heat is used for replacing an ordinary external heating mode; in a shorter reaction time, the high-qualityprussian blue nanometer material can be obtained. The PVP modified prussian blue nanometer material prepared by the method has the advantages of small polydispersity coefficient, uniform particle dimension distribution, higher magnetism and higher nanometer enzymatic activity.

The invention discloses a GO (graphene oxide) and g-C3N4 composite modified membrane material. A preparation method includes steps: activating an original membrane to recover original membrane flux; adding a surfactant into GO and g-C3N4 mixed dispersion liquid to obtain mixed liquid; soaking the activated original membrane into the mixed liquid to realize ultrafiltration adsorption, and soaking the membrane into aniline hydrochloric acid solution; taking out after soaking is finished, and soaking in hydrochloric acid solution of ammonium persulfate immediately to enable interface polymerization reaction; finally, drying the membrane to obtain the composite modified membrane material. By an ultrafiltration adsorption and interface polymerization combined modification method, GO and g-C3N4are combined for surface composite modification of the membrane material, and a visible light responsive catalytic modified membrane is developed. The novel modified membrane is low in preparation cost and recyclable, pollution resistance is remarkably improved, firmness in modifying agent and photocatalyst loading is achieved, the visible catalytic performance and hydrophilic performance are remarkably enhanced, the forbidden bandwidth of a membrane function layer is decreased, the problem of secondary pollution is avoided, and a promising application prospect is achieved.

The invention discloses a spiroketal frame bidentate phosphoramidite ligand as well as a preparation method and an application thereof. The ligand is the compound shown in a formula I or II or the enantiomer, racemate or diastereoisomer of the compound; and the ligand is prepared by condensation reaction of the compound in the formula I or II, and phosphorus-chlorine compounds. The spiroketal frame bidentate phosphoramidite ligand disclosed by the invention and transition metal salt form a complex, and the complex can be used for terminal olefine hydroformylation or isomerization-hydroformylation of internal olefins; and moreover, the spiroketal frame bidentate phosphoramidite ligand has high catalytic rate, good selectivity and practical value.

The invention discloses a first-class porous organic polymer containing a phosphine ligand as well as a preparation method and application of the first-class porous organic polymer. The polymer comprises the following formula I; the polymer is prepared by polymerizing compounds in the formula. After reacting with transition metal salt to generate a catalyst, the porous organic polymer containing the phosphine ligand is used for catalyzing hydroformylation reaction of alkyne; the porous organic polymer containing the phosphine ligand is high in catalyzing rate, high in selectivity and cycling performance and high in practical value.

Provides an artificial enzyme obtained by improving upon a sequence of a natural nicotine dehydrogenase, wherein the improvement comprises replacing at least one amino acid hindering product release with an amino acid with smaller side chains, thereby improving a catalytic rate.

The invention relates to a stirring device, in particular to the stirring device for refining petroleum in Chemical industry. The technical problem to be solved in the invention is to provide the stirring device for refining petroleum in Chemical industry with uniform stirring, impurity filtering and high catalytic speed. In order to solve the technical problem, the invention provides the stirringdevice for refining petroleum in Chemical industry, which comprises a bottom plate and the like, wherein a catalytic tank is arranged at the top of the bottom plate, and a cover plate is connected atthe top of the left side of the catalytic tank in a hinging way; a screen plate is arranged in the middle of the inside of the catalytic tank, and a mixing device is arranged at the upper part of thecatalytic tank; a stirring device is arranged at the lower part of the catalytic tank. The stirring device for refining petroleum in Chemical industry provided by the invention achieves the effects of stirring evenly, filtering impurities and increasing the catalytic speed. The device firstly mixes the crude oil and the catalyst by a stirring roller, then filters the impurities through the screenplate, and then stirs the crude oil and the catalyst by the stirring device to achieve the effect of fully catalyzed mixing.

The invention relates to methods and compositions for generating, modifying, adapting, and optimizing polynucleotide sequences that encode proteins having Rubisco biosynthetic enzyme activities which are useful for introduction into plant species, agronomically-important microorganisms, and other hosts, and related aspects.

The invention provides a preparation method for synthesizing a melamine high aluminum catalyst, and particularly relates to a preparation method of high aluminum-silica gel with the advantages of higher specific surface area, larger pore volume, higher strength and low wear rate. According to the preparation method disclosed by the invention, sodium metasilicate, sulfuric acid and pseudo boehmite are used as main production raw materials, wherein the sodium metasilicate and the sulfuric acid are gelatinized and then need to be subjected to aging and reaming, acid soaking and water washing, so that higher specific surface area, larger pore volume and larger pore diameter of the catalyst are guaranteed, and the activity of the catalyst is effectively improved; high-quality pseudo boehmite is added in beaten silica gel slurry, so that the content of activated aluminum oxide in the catalyst and the strength of the catalyst are effectively improved. By adopting the preparation method provided by the invention, the high-quality silica gel required by industry can be produced: the specific surface area is greater than or equal to 300 m<2>/g, the pore volume is 0.4 to 0.7 cm<3>/g, and the wear rate is smaller than or equal to 1.5 percent; the key problem of producing alumino silica gel with the high specific surface area, the high pore volume, the high strength and the low wear rate is solved; the preparation method has the advantages of simple steps, convenience in operation and high practicality.

The invention belongs to the technical field of harmful gas treatment, and especially relates to a harmful gas treatment system for metal material hot working. The harmful gas treatment system is provided to solve the problems that when existing harmful gas treatment devices are used, a large amount of dust in harmful gas is inconvenient to filter in advance, harmful gas which is just generated istoo high in temperature and is inconvenient to directly treat and discharge. The system comprises a shell, a first dust removal shell, a purification shell and a water tank are installed in the shell, a second dust removal shell is installed in the first dust removal shell, one side of the second dust removal shell is communicated with one end of a gas inlet pipe, the other end of the gas inlet pipe penetrates through the first dust removal shell and the shell, and the other side of the second dust removal shell is communicated with one end of a first gas outlet pipe. When the system is used,a large amount of dust in harmful gas can be filtered in advance, the harmful gas with over-high temperature is cooled, catalytic reaction and low-temperature gas emission are facilitated, and a catalyst can be uniformly added.

The invention provides a preparation method of nanoparticles of amphoteric ionized dendrimer inclusion gold. The preparation method mainly comprises the following steps: adding dimethyl sulfoxide into a fifth generation polyamide-amine dendrimer (G5 PAMAM); adding maleic anhydride to obtain fifth generation polyamide-amine dendrimer-maleic anhydride (G5M); then, adding mercaptoethylamine into a G5M water solution to obtain fifth generation polyamide-amine dendrimer-maleic anhydride-mercaptoethylamine (G5MC); adding a chloroauric acid water solution into a G5MC water solution; after stirring for 10min to 70min, adding sodium borohydride and adjusting the pH (Potential of Hydrogen) of a mixed solution to be neutral by utilizing 1M hydrochloric acid, so as to obtain the nanoparticles of the amphoteric ionized dendrimer inclusion gold (Au-G5MC). The preparation method has moderate preparation conditions and is simple to operate; a reaction process is easy to control and the stability of the nanoparticles is effectively protected.

The invention provides a photoelectrocatalytic metal-supported boron-doped diamond. The metal-supported boron-doped diamond comprises a substrate and a boron-doped diamond layer arranged on any side of the substrate, and the boron-doped diamond layer comprises a flat bottom layer, a conical structure layer perpendicular to the flat bottom layer, and a metal nanoparticle catalyst uniformly loaded at the tip of the conical structure layer. The photoelectrocatalytic metal-supported boron-doped diamond has the advantages of high catalytic activity, high stability, high selectivity in a chemical process, and great increase of the selectivity and efficiency of the catalytic process.

The invention belongs to the technical field of photocatalysis, and particularly relates to a preparation method and application of erbium-doped zinc cobaltate photocatalyst powder. The general formula of the photocatalyst is ZnEr2xCo2 (1-X) O4 where x is equal to 0.02 to 0.06. The preparation method is to use zinc cobaltate as a matrix which is doped with an erbium element, and the crystalline form of the doped matrix is not affected. The photocatalyst powder obtained is high in purity, and the photocatalysis performance is greatly improved. The preparation process realized by adopting direct sintering is simple and easy to operate, the calcination temperature is low, and the conditions are mild and easy to control. The sample prepared has the advantages of high purity, high yield and no need of adding precipitant and low cost, and is suitable for industrial production. The erbium-doped zinc cobaltate photocatalyst powder disclosed by the invention can be applied to increasing the photocatalytic degradation rate of Congo red.

The invention discloses an intracellular scaffold, plasmids constructed by the intracellular scaffold and an application of the plasmids. The intracellular scaffold consists of a DNA scaffold sequenceand a TALE-target molecule fusion protein; the DNA scaffold sequence includes a binding sequence BM1, a binding sequence BM2 and a binding sequence BM3; the TALE-target molecule fusion protein includes a TALE1-target molecule fusion protein, a TALE2-target molecule fusion protein and a TALE3-target molecule fusion protein; the TALE1-target molecule fusion protein is bound to the binding sequenceBM1, the TALE2-target molecule fusion protein is bound to the binding sequence BM2, and the TALE3-target molecule fusion protein is bound to the binding sequence BM3. The DNA scaffold sequence is constructed on pSB1C3, BBa-J63009 or pSB4A5 plasmids, the TALE-target molecule fusion protein is constructed on pET28a (+) plasmids, and the obtained transformed plasmids are co-transformed into escherichia coli, IPTG-induced expression is performed, and the obtained plasmids can be used for improving the yield of mevalonic acid in mevalonic acid synthesis reaction.

The invention discloses a nanometer porphyrin catalyst. The nanometer porphyrin catalyst takes a cationic surface active agent and ZnTPyP as main raw materials, and is formed through water bath self-assembly; the nanometer porphyrin catalyst has better peroxidase activity and can be effectively utilized to catalyze and oxidize 3,3',5,5'-tetramethylbenzidine (TMB) to generate a colorless-to-blue color development reaction. The nanometer porphyrin catalyst has the advantages that rapid color development is achieved, the catalytic efficiency is high, the synthetic cost is low, and the catalytic effect of DTAB self-assembled ZnTPyP is higher than that of a pure surface active agent DTAB and much higher than that of the ZnTPyP, and the nanometer porphyrin catalyst has an important application prospect.

The invention relates to an engineering bacterium for whole-cell catalytic production of 5-aminopentanoic acid and a preparation method of the 5-aminopentanoic acid. Compared with a starting strain, the engineering strain has the same expression as a gamma-aminobutyraldehyde dehydrogenase abD gene, a lysine dehydrogenase cadA gene and a butanediamine oxidase puO gene. The 5-aminopentanoic acid whole-cell catalytic engineering bacterium with high catalytic rate and high catalytic concentration is constructed through combination optimization of the expression of the gamma-aminobutyraldehyde dehydrogenase abD, the lysine dehydrogenase cadA and the butanediamine oxidase puO and selection of an optimal host bacterium.

The invention provides a preparation method of an iron-based MOFs oxygen evolution electrocatalyst with a high-activity crystal face proportion, and the catalyst, and belongs to the technical field of oxygen evolution electrocatalysts. The method comprises the following steps: weighing ferric salt and an organic ligand fumaric acid according to the molar ratio of iron ions to fumaric acid of 1: (64-128), dissolving the ferric salt and the organic ligand fumaric acid in an N, N-dimethylformamide solvent, and uniformly stirring to obtain a mixed solution; carrying out solvothermal reaction on the obtained mixed solution at a certain reaction temperature for a period of time, and naturally cooling to room temperature; and washing the obtained product with absolute ethyl alcohol, and then drying and collecting to obtain the product which is the iron-based MOFs oxygen evolution electrocatalyst. The iron-based MOFs electrocatalyst with the high active crystal face exposure proportion can be synthesized in situ by regulating and controlling the proportion of the metal Fe ions and the organic ligand fumaric acid and using a mild solvothermal method, the preparation method is mild, simple and easy to operate, and the purpose of regulating and controlling the crystal face can be achieved without additionally introducing a surfactant.

The invention relates to a method for increasing the activity of enterococcus faecium Glutamate Decarboxylase by using D101 macroporous adsorption resin, and belongs to the technical field of biology. According to the method disclosed by the invention, the D101 microporous adsorption resin is used as an enzyme activity accelerator of enterococcus faecium GAD, and a D101 microporous adsorption resin-GAD composite catalytic system is constructed according to a proportion that the mass of the D101 macroporous adsorption resin to the volume of a substrate solution to the volume of an enterococcus faecium bacterial suspension solution or a GAD free enzyme solution is 1 to 1 to 1; when the D101 microporous adsorption resin-GAD composite catalytic system is subjected to reaction in a water bath oscillator of which the temperature is 37 to 43 DEG C at 80r/min or stirring reaction in a stirring tank at a low speed for 24 to 36 hours, the yield of GABA (Gamma-Aminobutyric Acid) can be increased by 18.54 to 149.11 percent; the D101 macroporous adsorption resin is capable of remarkably increasing the activity of the GAD, an exchange adsorption function of the D101 microporous adsorption resin on the GABA is also a purifying process of the GABA, a downstream extracting and purifying technology is simplified, and the production cost is reduced; the method is simple, green and environment-friendly.

The various embodiments of the present invention relate generally to compositions, systems, and methods for altering rates of catalysis. More particularly, the various embodiments of the present invention are directed toward compositions, systems, and methods for enzymatic hydrolysis of polysaccharides, such as cellulose and starch. An aspect of the present invention comprises a method for altering the rate of conversion of a substrate into a product comprising: providing a substrate in a carrier; mixing a reactant and a co-factor with the carrier to form a substantially homogeneous mixture of the reactant, the co-factor, and the substrate in the carrier; and reacting the reactant with the substrate in the presence of the co- factor to convert at least a portion of the substrate into the product, wherein the reaction rate of the reactant with the substrate in the presence of the co-factor is different than the reaction rate of the reactant with the substrate in the absence of the co-factor.