Covalent organic framework-based composite photocatalyst for degrading organic pollutants in water and preparation method of photocatalyst

• Main Authors: ZENG JIALI, WANG FEI, DU YEYE, WU MEIFENG, WU MINGMIN, TAN RONG, GONG BAICHUAN
• Format: Patent
• Language: Chinese; English
• Published: 12.07.2019
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a covalent organic framework-based composite photocatalyst for degrading organic pollutants in water and a preparation method of the photocatalyst. The method comprises the following steps: performing ice bath on a covalent organic framework crystalline triazine-based organic framework (CTF-1) solution and a 4-aminobenzoic acid solution, performing stirring, performing washing, and performing vacuum drying to prepare a benzoic acid functionalized CTF-1, wherein the benzoic acid functionalized CTF-1 is labeled as CFB; and performing ball milling to compound the CFB with phosphotungstic acid (H3PW12O40) according to different ratios to obtain H3PW12O40/CFB, that is, the covalent organic framework-based composite photocatalyst used for degrading the organic pollutants in the water. According to the method provided by the invention, the covalent organic framework CTF-1 is subjected to benzoic acid functional modification, and the phosphotungstic acid is immobilized into the CTF-1, so that m