3results about How to "Improve visible light absorption" patented technology

This invention belongs to the field of photocatalyst materials technology, specifically relating to a three-dimensional graphene aerogel photo-self-propelled Fenton catalyst, its preparation method, and its application. The preparation method includes: mixing a graphene dispersion containing ethylenediamine with a phenolic resin prepolymer containing ferrocene, phenols, and an alkaline catalyst; followed by a one-step hydrothermal reaction, washing, and freeze-drying to obtain the three-dimensional graphene aerogel photo-self-propelled Fenton catalyst. This catalyst can be used to degrade organic pollutants in water under visible light irradiation.

The application relates to preparation of a fluorine-containing triazine group covalent organic framework material and application of hydrogen peroxide production. Three imine bond connected covalent organic framework materials are prepared to solve the problems of low photocatalytic performance and low solar energy conversion efficiency of existing covalent organic framework materials. The method is as follows: 1,3,5-tris(3-fluoro-4-formylphenyl)benzene and 2,4,6-tris(4-aminophenyl)-1,3,5-triazine are prepared into TFBTAPT-COF by a solvent method. The preparation process is simple and effective, reagent consumption is low, and the yield is high; and the photocatalyst provided by the application can effectively improve the hydrogen peroxide production performance. The application is applied to photocatalytic preparation of hydrogen peroxide, and experiments show that the material TFBTAPT-COF has excellent photocatalytic hydrogen peroxide production performance, and the hydrogen peroxide performance can reach 8750mmol g ‑1 h ‑1 under visible light irradiation.

This invention relates to an In2S3 / In2MnS4 photoelectrocatalyst for the production of H2O2 or HClO and its preparation method, belonging to the field of high-value-added chemicals and catalyst production technology. In2S3 hollow hierarchical microtubes are obtained through a solvothermal method, and Mn is converted into hydrogen through ion exchange. 2+ Partial exchange In 3+ An In2S3 / In2MnS4 photocatalyst was obtained. An In2S3 / In2MnS4 / PVDF / NF photocathode was obtained by loading In2S3 / In2MnS4 onto PVDF-modified nickel foam, and an In2S3 / In2MnS4 / CP photoanode was obtained by drop-coating In2S3 / In2MnS4 onto carbon paper. Under visible light irradiation and a specific additional bias voltage, the yields of H2O2 and HClO produced by the catalytic process reached 2107.8 μmol / L and 28.5 mg / L, respectively, within 90 min. This invention is simple, efficient, and low-cost, and can be applied to the photoelectric production of H2O2 and HClO.