3results about How to "Pore ​​structure high" patented technology

This invention discloses a method for preparing functional carbon materials with atomically dispersed Lewis acid-base sites, comprising: (1) polymer preparation to obtain a polymer sample; (2) polymer modification to obtain a modified polymer sample; (3) polymer carbonization: the modified polymer sample is heat-treated in a non-oxidizing atmosphere to carbonize the modified polymer sample; after carbonization, the system is naturally cooled; then, after washing and drying, the target functional carbon material is obtained. This invention utilizes atomically dispersed Lewis acidic metal sites and basic N sites to modify carbon materials in situ. The prepared functional carbon material has a large specific surface area, well-developed pore structure, abundant acid-base sites, and an atomically distributed structure, which can significantly improve the density of functional sites on the surface of the carbon material and its adsorption efficiency for boron, phosphorus, and metal impurities. Its application in the purification of chlorosilanes can greatly reduce the load of subsequent distillation and impurity removal, and improve the yield and quality of high-purity chlorosilanes.

The invention relates to the technical field of denitration catalysts, and discloses a high alkali metal / alkaline earth metal resistant denitration catalyst, which comprises a carrier, a modified substance, an active substance and a cocatalyst, wherein the active substance and the cocatalyst are loaded on the carrier to protect the carrier, so that the carrier has high alkali metal / alkaline earth metal poisoning resistance; the carrier is TiO2 nanoparticles, the modified substance is Ce ions, and the active substance and the cocatalyst are transition metal oxides; according to the mass ratio of the metal to the carrier, the loading capacities of the modified substance, the active substance and the cocatalyst are all 3%-30%. The TiO2 nano-particles are modified, so that the TiO2 nano-particles have excellent alkaline earth metal / high alkali metal poisoning resistance and are suitable for flue gas denitration treatment of a coal-fired power plant, the denitration efficiency is greatly improved, the service life is greatly prolonged, the production efficiency is improved, the replacement cost of the catalyst is reduced, and the preparation method of the catalyst is simple, safe and easy to operate.

The invention discloses manganese-chlorine co-doped carbon nitride and a photocatalytic hydrophobic self-cleaning coating based on the manganese-chlorine co-doped carbon nitride. A preparation method comprises the following steps: firstly, uniformly grinding melamine, ammonium chloride and manganese chloride to obtain mixed powder; according to the method, due to the fact that the atomic radius of manganese and chlorine is large, the interlayer spacing of the carbon nitride is effectively increased, a larger space is provided for photo-generated electrons and photo-generated holes, the recombination probability between the photo-generated electrons and the photo-generated holes is reduced, the migration ability of carriers is improved, and the performance of the carbon nitride is improved. The photocatalytic reaction efficiency is enhanced; new energy levels and band gaps are formed in the doping process, the forbidden band width of the carbon nitride is reduced, the visible light utilization rate of the material is effectively improved, the manganese and chlorine co-doped carbon nitride of the petal-shaped structure is obtained, the specific surface area of the material is effectively increased, and the photocatalytic activity of the coating is remarkably improved. A photocatalytic hydrophobic self-cleaning coating based on the super-hydrophobic self-cleaning photocatalyst has good super-hydrophobic performance.