2results about How to "Good visible light response performance" patented technology

A method for visible-light catalytic degradation of trace organophosphorus pesticides in aquatic environments involves first preparing functionalized nitrogen carbide materials via high-temperature pyrolysis. Then, zirconium-based MOFs are grown in situ on the surface of the functionalized nitrogen carbide materials, and a highly efficient heterogeneous composite photocatalyst is designed and synthesized. Finally, the trace organophosphorus pesticides in the aquatic environment are rapidly and stably degraded under visible light. The advantages of this invention are: the process is reasonable and easy to implement; the zirconium-based MOFs-modified functionalized nitrogen carbide heterogeneous composite photocatalyst prepared by this method exhibits good visible-light responsiveness and stability for organophosphorus pesticide degradation, achieving efficient adsorption and rapid mass transfer of organophosphorus pesticides; this degradation technology possesses high adsorption capacity, multiple catalytic activities, and strong practicality, greatly facilitating the visible-light degradation of trace organophosphorus pesticides, improving the efficiency of heterogeneous composite photocatalysts, and broadening the application range of functionalized nitrogen carbide materials and zirconium-based MOFs.

The invention discloses a CeO2 / ZnMn2O4Z type heterojunction photocatalyst as well as a preparation method and application of the CeO2 / ZnMn2O4Z type heterojunction photocatalyst. The CeO2 / ZnMn2O4 Z type heterojunction photocatalyst is prepared from CeO2 and ZnMn2O4, wherein the mass ratio of the CeO2 to the ZnMn2O4 is (0.25 to 1) to 1. The CeO2 / ZnMn2O4Z type heterojunction photocatalyst is prepared by the following two steps: firstly, preparing long-strip-shaped ZnMn2O4 by adopting a coprecipitation-calcination method, then adding a cerous nitrate solution to uniformly disperse the long-strip-shaped ZnMn2O4, obtaining a precipitate mixture under the precipitation action of ammonia water, and finally performing pyrolysis to obtain the CeO2 / ZnMn2O4Z type heterojunction photocatalyst. The catalyst is provided with a Z-type heterojunction, separation of photon-generated carriers is promoted, the recombination process of the photon-generated carriers is effectively inhibited, and the catalyst has high photocatalytic degradation efficiency and reaction stability on tannic acid under simulated sunlight illumination.