5results about How to "Shorten the compositing time" patented technology

The invention discloses a preparation method of a Pt / TiO2 catalyst and its application in NH3-SCO reaction. The preparation method comprises the following steps: providing nano titanium dioxide; mixing a platinum source, water and alcohol to prepare a platinum source solution; placing the nano titanium dioxide in the platinum source solution, turning on ultraviolet light for photodeposition reaction, and then filtering and drying the precipitate to obtain a Pt / TiO2 catalyst. The method can prepare a Pt / TiO2 catalyst with low noble metal loading, high and low temperature activity and high N2 selectivity.

The invention discloses a supported catalyst with a strong-coupling bimetallic nanoparticle active center, a preparation method of the supported catalyst and application of the supported catalyst in selective dehydrogenation of isopropanol. The preparation method comprises the following steps: mixing a dimethyl sulfoxide solution containing acetylacetone metal salt A and acetylacetone metal salt B with a dimethyl sulfoxide solution containing a carrier powder sample, carrying out ultrasonic treatment to a transparent colloid shape, drying, and roasting to obtain the supported catalyst with the strong coupling bimetallic nanoparticle active center. The prepared catalyst shows excellent catalytic efficiency in the selective dehydrogenation reaction of isopropanol, the yield of acetone in an isopropanol dehydrogenation product can be kept at 90% or above at a wide temperature window (100-200 DEG C), and the acetone generation rate of the catalyst at 200 DEG C is increased by 10.5 times compared with that of a traditional Pd-based catalyst.

The present invention discloses a VN x O y / V2O3 nanoparticles and PEDOT:PSS organic-inorganic thermoelectric composite film method, using melamine and vanadium pentoxide as precursors to prepare VN x O y / V2O3 nanoparticles, VN x O y / V2O3 nanoparticle powder was mixed with PEDOT:PSS to prepare an organic-inorganic thermoelectric nanocomposite film with excellent thermoelectric performance, with a conductivity of 8278.4S / cm, a Seebeck coefficient of 48.8μV / K at 105 degrees Celsius, and a power factor of 1995.7μWm ‑1 K ‑2 .

The invention relates to a carbon quantum dot fluorescent material synthesized by efficient catalysis of cuprous oxide and a preparation method of the carbon quantum dot fluorescent material, and provides a synthesis method for preparing a bright carbon quantum dot fluorescent material by efficient catalysis of a dehydration decomposition reaction of isopropanol and organic amine by taking a Cu2O colloidal solution simultaneously synthesized by a one-step method as a catalyst. Copper salts such as copper chloride and copper acetate are used as starting raw materials of catalysts, isopropanol is used as a carbon source and a solvent, and organic amines such as ethylenediamine, o-phenylenediamine and 2, 3-diaminonaphthalene are used as nitrogen sources and organic alkali. Cu < 2 + > is hydrolyzed into a Cu (OH) 2 colloidal solution under the action of organic alkali; the Cu (OH) 2 colloidal solution is reduced into a Cu2O colloidal solution by glucose at a certain temperature; the Cu2O colloidal solution efficiently catalyzes the dehydration decomposition reaction of isopropanol and organic amine to synthesize the bright fluorescent carbon quantum dot material. According to the synthesis method, the reaction temperature and time for synthesizing the carbon quantum dots by a solvothermal method are greatly reduced. The method provided by the invention is an efficient, green and environment-friendly preparation method for synthesizing carbon quantum dot fluorescent materials with various colors.

This invention provides a method for synthesizing Silicalite-1 molecular sieves using n-butylamine as a template agent, relating to the field of molecular sieve technology. The invention involves mixing n-butylamine, water, a silicon source, Silicalite-1 molecular sieve seed crystals, and sodium hydroxide to obtain an initial gel mixture. The silicon source includes one or more of silica, silica sol, silica gel powder, and tetraethyl orthosilicate. The initial gel mixture is then subjected to hydrothermal crystallization to obtain Silicalite-1 molecular sieves. This invention uses n-butylamine as a template agent and employs a seed-assisted synthesis method for Silicalite-1 molecular sieves, which significantly reduces the amount of n-butylamine used and the synthesis time. Compared with existing technologies, the synthesis method provided by this invention features inexpensive raw materials, low organic template agent usage, high product crystallinity, short synthesis time, and high yield, overcoming the disadvantages of existing synthesis methods that require expensive and large amounts of template agents.