6 results about "Oxygen atmosphere" patented technology

The invention discloses a method for preparing a 2-iodine amyl -2-ene-1,4-diketone derivative by adopting visible light catalysis. The method comprises the steps of adding allene, perfluorobutyl iodide, an additive and a photocatalyst as shown in a formula (I) to an organic solvent at the molar ratio of 1:(1-2):(1-2):(0.005-0.1), stirring under the conditions of an oxygen atmosphere, visible light illumination, room temperature and ordinary pressure for 10-20h, carrying out post-treatment on a reaction liquid to obtain a 2-iodine amyl -2-ene-1,4-diketone derivative as shown in a formula (II), wherein the additive is NaI, NH4I or KI; the organic solvent is ethanol, dichloromethane, benzene, methylbenzene, tetrahydrofuran or acetonitrile; the photocatalyst is selected from one of the following components: Ir(ppy)3, Eosin Y, Rose Bengal, [Ir(dF-CF3-ppy)2(dtbbpy)]PF6, [Ir(ppy)2(tbbpy)]PF6, Ru(bpy)3(BF4)2. The method is mild in reaction condition, simple in operation, high in selectivity and good in yield; a substituent group can be expanded; and visible light catalysis is adopted, so that the method has the characteristics of being free of pollution and environment-friendly. The formulas are as shown in the specification.

The invention relates to a plating method for an anti-reflection film with high transmittance and low reflectivity, wherein the method is the key technology of window glasses and filters of digital cameras, and the technology can further be applied in fields of radiation protection glasses, thermal insulation glasses, window glasses, solar energy utilization and the like. The method comprises the following steps in vacuum plating equipment: (1) pumping vacuum; (2) heating; (3) cleaning ions (Ar and O2); (4) plating SiO2; (5) etching under full oxygen atmosphere (only introducing O2); (6) plating TiO2; and (7) etching under full oxygen atmosphere (only introducing O2), and repeated performing the steps of (4)-(7) until the film system is completed. According to the present invention, the transmittance of the anti-reflection film in the optical wavelength region of 400-700 nm is improved without improvement of vacuum plating equipment requirements, and the reflectivity is further reduced.

The invention provides a preparation method of a radial structure spherical NCM811 type ternary positive electrode material. The preparation method comprises the following steps: preparing a nickel salt, cobalt salt and manganese salt solution used as a solution 1, wherein a molar ratio of Ni:Co:Mn is 8:1:1; taking a precipitant, and preparing a solution 2; taking a complexing agent, and preparinga solution 3; adding the complexing agent solution into a reaction kettle as a base solution; adding the solution 1, the solution 2, and the solution 3 into the reaction kettle, introducing an inertgas to carry out protection, controlling the total ammonia concentration of the reaction system to be 0.5-1.5 mol/L, and performing aging under a pH value of 11.3-11.7 at a temperature of 45-55 DEG Cfor 5-15 h; washing the obtained reaction product, performing suction filtration, and drying the reaction product to prepare a precursor; grinding and uniformly mixing the precursor and a lithium saltwhich are used as raw materials; placing and sintering the obtained mixture in a muffle furnace in an oxygen atmosphere, wherein the sintering process comprises sintering at 400-500 DEG C for 4-8 h,and sintering at 700-780 DEG C for 10-15 h; and cooling the sintered mixture to room temperature to prepare the positive electrode material. The material obtained by the invention has the advantages of stable structure, excellent electrochemical performances, and reduction of the industrialization cost.

The invention relates to a method for preparing high-purity porous graphite, which comprises the following steps of: graphitizing amorphous carbon by using an electrochemical method to obtain a graphite-based composite material embedded with MX particles, performing oxidation treatment on the obtained composite material in an oxygen-containing atmosphere, cooling the solid subjected to oxidation treatment, washing to remove electrolyte impurities in the solid, and drying to obtain the high-purity porous graphite. The porous graphite material is obtained. The method can be suitable for impurity removal of amorphous carbon with high heteroatom content after electrochemical graphitization, the source of the amorphous carbon precursor is greatly expanded, renewable resources can be used, and the method is more energy-saving and environment-friendly; the impurity removal effect is good, the electrolyte can be completely removed, and the porous graphite with extremely high purity is obtained; the obtained porous graphite has accumulated pores among lamellar graphite, and the lamellar graphite is also provided with pores, so that the porous graphite can be applied to various fields. When applied to an ion-embedded electrode material, the material has good capacity and rate capability.

The invention discloses a synthesis method of an indole-2,3-dione compound. The method comprises the following steps that a raw material as shown in a formula I is added into a Schlenk reactor, then acatalyst bis(acetonitrile)dichloropalladium (PdCl2(CH3CN)2), an oxidizing agent silver acetate (AgOAc) and a solvent methylbenzene are added, reaction is carried out under an oxygen atmosphere at 120-150 DEG C for 8-36 hours, a TLC board is used for monitoring the reaction, and after the reaction is carried out completely, the indole-2,3-dione compound as shown in a formula II is obtained throughpost-treatment.