35results about How to "Highly active and stable" patented technology

The present invention discloses a catalyst used for preparing methanol by hydrogenation of carbon dioxide and a preparation method thereof, relating to a palladium-zinc catalyst which takes a carbon nanotube base material as an accelerating agent and a preparation method thereof; the catalyst contains main components of Pd and Zn and an accelerating agent of the carbon nanotube base material, the chemical formula is PdiZnj-x percent (CNT or y percent of Pd / CNT), and in the formula, i and j are mole ratio coefficients of relevant metallic elements in the main components of Pd-Zn, and x percent is masspercent of the accelerating agent of carbon nanotube base material in the catalyst; and the mass percentage of all the components is as follows: 2 percent to 25 percent of Pd, 55 percent to 90 percent of Zn and 6 percent to 20 percent of the accelerating agent of the carbon nanotube base material. During the preparation, the main components of Pd and Zn and the accelerating agent are coprecipitated and react and are dried and roasted so as to prepare the methanol. The activity of the catalyst is high and stable; the selectivity of the product of methanol is high; the conversion rate of hydrogenation of CO2 and space time yield of the methanol are obviously higher than the existing similar catalyst; the manufacturing is simple and convenient and the repetitiveness is good.

The invention relates to a SO42- / TiO2-C nanotube, and a preparation method and application thereof, belonging to the field of nanotubes. The SO42- / TiO2-C nanotube comprises TiO2 with the percentage mass content of 85 to 98%, carbon with the percentage mass content of 1 to 12%, and sulfate radical with the percentage mass content of 0.5 to 5.5%, wherein 93% to 98% of carbon in percentages by mass is covered on the inner surface of a TiO2 nanotube. The preparation method comprises the following steps: weighing TiO2 powder, then adding an alkali liquid with a concentration of 5% to 40%, and carrying out a hydrothermal reaction at 100 to 180 DEG C for 12 to 48 hours so as to obtain a hydrothermal product; carrying out filtering and washing, and carrying out drying at 40 to 85 DEG C so as to obtain a solid containing titanic acid; then carrying out contacting with an organic polymer so as to obtain a contact product; subjecting the contact product to calcination under inert gas entrained with organic alcohol so as to obtain a TiO2-C composite nanotube; and carrying out contacting with a sulfuric acid aqueous solution, carrying out drying, and carrying out calcination under inert gas so as to obtain a SO42- / TiO2-C nanotube catalyst. The catalyst is applied in reactions of esterification, hydrolysis and dehydration, and has good activity and long service life. The nanotube catalyst comprises mesoporous channels, and facilitates to diffusion of reactants and products; and the surface of the catalyst is not easy to coke.

The invention discloses a catalyst used for preparing synthetic natural gas by using coal derived synthesis gas and a preparation method thereof, relates to a catalyst for preparing synthetic natural gas by hydrogenation and methanation of the coal derived synthesis gas, and provides a catalyst which has high and stable low temperature activity, can effectively improve the conversion rate of synthesis gas and the perpass yield of methane, and is used for preparing synthetic natural gas by using coal derived synthesis gas and a preparation method thereof. The catalyst is an ytterbium-promptingcoprecipitation nickel-zirconium base catalyst and comprises the main components Ni and Zr as well as an accelerator Yb. The method comprises the following steps of: mixing Ni(NO3)2.6H2O, Zr(NO3)4.3H2O and Yb(NO3)3.6H2O, then adding water in the mixture to prepare a solution A; dissolving K2CO3 into water to prepare a solution B; injecting the solutions A and B into a container for a reaction; filtering a feed liquid to obtain precipitates; and washing with deionized water until ion concentration of K<+> in a leacheate is below 0.1ppm, then filtering, drying, roasting to obtain the catalyst.

Streptomyces olivaceus strain GDMCC No.60272. A microbial inoculant prepared from the above strains. The preparation method of the above-mentioned microbial bacterial agent and the application of the prepared microbial agent in promoting the growth of plants in saline soil environment. The streptomyces strain of the invention has high activity and stability, and can effectively promote the growth of plants in saline soil environment. The microbial agent of the invention has simple preparation method, low production cost, no pollution and is suitable for large-scale application. Irrigation of plants with the microbial agent of the present invention can promote the growth of plants in the saline soil environment, thereby improving the saline soil, with low cost, simple use, no pollution, no toxin residue, and no harm to humans, animals and the environment.

The invention discloses a supermolecule composite photo-thermal reagent and an application thereof in photo-thermal treatment and near-infrared imaging, and belongs to the technical field of cancer treatment and imaging medicine preparation. Based on the poor self heat stability and water solubility of indocyanine green and other characteristics, Organic photo-thermal reagent indocyanine green and sodium dodecyl sulfate are intercalated between hydrotalcite layers together through a low-temperature coprecipitation synthesis method of a methyl alcohol-water mixed solvent, the composite nano photo-thermal reagent with indocyanine green existing in a high dispersion mode is obtained by adjusting the proportion of indocyanine green to sodium dodecyl sulfate, the reagent is applied to cancer treatment and near-infrared imaging study, and a good effect is achieved. Meanwhile, an identical synthetic method is adopted for intercalating indocyanine green, sodium dodecyl sulfate and targeted molecular folic acid between the hydrotalcite layers together, and the effect of treatment and near-infrared imaging is further enhanced. The supermolecule composite photo-thermal reagent is irradiated by 1.1W / cm<2> near-infrared light of 808 nm for 12 min in the concentration of 8 micrograms / ml, and the survival rate of cancer cells is generally lower than 15%.

The invention discloses a method for degrading bisphenol A by activating sodium percarbonate with nanometer zero-valent iron, and catalytically activating sodium percarbonate to degrade bisphenol A after preparing nanometer zero-valent iron. The reaction conditions are mild and easy to operate; nanometer zero-valent iron is used as the reaction system The catalyst activates the oxidant sodium percarbonate to generate OH and O 2 ·‑ Free radicals degrade bisphenol A, the degradation process is simple, and the degradation efficiency is high; the catalyst can be recycled and reused, and the oxidant is convenient for storage and transportation, with high activity and stability.