85results about How to "Increase surface active sites" patented technology

The invention relates to a multifunctional composite material with a heterostructure as well as a preparation method and application of the multifunctional composite material with the heterostructure, and belongs to the technical field of photocatalysis. The preparation method comprises the following steps of: dissolving an graphene oxide in water, carrying out ultrasonic processing to obtain a graphene oxide dispersion liquid, and dripping a silver nitrate solution into the graphene oxide dispersion liquid while stirring, so as to obtain a mixed solution A; slowly dripping ammonia water into the mixed solution A to obtain a mixed solution B; stirring the mixed solution B, and slowly dripping a disodium hydrogen phosphate solution into the mixed solution B to obtain a mixed solution C; then slowly dripping a P25 solution into the mixed solution C under the magnetic stirring condition to be continuously stirred, transferring the obtained mixed solution C into a hydrothermal reaction kettle, and cooling the obtained mixed solution C till the temperature of the obtained mixed solution C drops to the room temperature after the hydrothermal reaction; and carrying out the vacuum drying on a resultant to obtain a composite material after the resultant is centrifuged and rinsed. The prepared composite material can not only absorb pollutants in water, but can also rapidly degrade organic pollutants of certain concentration under the irradiation of visible light. Moreover, the prepared composite material has efficient broad spectrum sterilization activity to various common bacteria.

The invention provides a CO-SCR denitration catalyst and a preparation method and application thereof.The preparation method comprises the steps that a precipitant is added into a solution of mixed metal salt to obtain precipitate, ball-milling treatment is conducted on the precipitate to obtain powder, and the powder is heated to 450-850 DEG C to be calcined; wherein the mixed metal salt is a manganese salt and other metal salts, and the other metal salts are one or more of a copper salt, an iron salt, a cerium salt, a cobalt salt and a nickel salt. The catalyst provided by the invention hasgood water resistance, effectively solves the problem of CO + O2 competition in the CO-SCR catalytic process, and overcomes the defect of low catalytic NOx removal efficiency of an existing material under the double interference conditions of water vapor and oxygen.