3results about How to "Good visible light response" patented technology

The invention discloses a visible light photocatalyst for in-situ synthesis of hydrogen peroxide and a preparation method and application thereof, belonging to the technical field of photocatalytic material preparation; the invention adopts a wet impregnation method to impregnate a covalent organic polymer with chloroauric acid so that the chloroauric acid is evenly distributed on the inner surface of the covalent organic polymer, thereby assisting sodium borohydride reduction to obtain gold nanoparticles and loading them on the covalent organic polymer to synthesize a gold-loaded covalent organic polymer (Au / COFs) visible light photocatalyst; the photocatalyst can significantly improve the absorption capacity of visible light, has good visible light photoresponse and excellent photocatalytic performance, and can efficiently reduce oxygen to synthesize hydrogen peroxide in situ under visible light; the photocatalyst can be applied to the environmental field of sustainable development and the field of clean production, sterilizes water bodies by combining with advanced oxidation technology, and the preparation method is simple, the synthesis efficiency is high, meets the actual production needs, and has high practical value and good environmental significance.

The application discloses a Bi2O2CO3 / MIL-68-NH2 composite material and a preparation method and application thereof, and belongs to the technical field of photocatalytic materials and the field of water environment treatment. The composite material is formed by loading Bi2O2CO3 on the surface of MIL-68-NH2 to form a heterojunction structure; the MIL-68-NH2 is a regular hexagonal rod-shaped crystal with a length of 10-20 microns; and the Bi2O2CO3 is a sphere with a diameter of 2-3 microns, and the surface is a carnation-shaped hierarchical stacking structure and is dispersed and loaded on the surface of the MIL-68-NH2. The composite material prepared by the application has the advantages of simple preparation method, strong visible light absorption capacity, stable catalytic performance, high degradation efficiency and the like, and has a potential application prospect in the field of water treatment.

The invention discloses a preparation method and application of a TiO2 nano array composite electrode, and belongs to the technical field of photoelectrocatalysis composite materials. The method comprises the following steps: (1) carrying out ultrasonic washing on the titanium foil, and then polishing; (2) carrying out electrolytic oxidation by taking a titanium foil as an anode and a titanium plate as a cathode, washing the oxidized titanium foil, and carrying out annealing treatment to obtain an anatase type TiO2 nanotube; (3) dissolving bismuth nitrate pentahydrate and potassium bromide in ethylene glycol, stirring, and then adding ferric nitrate nonahydrate to obtain a Fe / BiOBr precursor solution; and (4) carrying out hydrothermal reaction on the Fe / BiOBr precursor solution obtained in the step (3) and the anatase type TiO2 nanotube obtained in the step (2), and then washing and drying a reaction product to obtain the TiO2 nano array composite electrode. The composite electrode prepared by the invention has relatively high catalytic activity, and efficient degradation of 99.2% and 97.6% of EE2 and CAP is realized respectively.