Visible Light-Induced Photocatalysis:Self-Fenton Degradation of p-CIPhOH Over Graphitic Carbon Nitride by a Polyethylenimine Bifunctional Catalyst

作     者：Yuan Bai Shuangjun Li Bolin Yin Jinpeng Zhao Hexing Li Yuan Bai;Shuangjun Li;Bolin Yin;Jinpeng Zhao;Hexing Li

作者机构：Key Laboratory of Resource Chemistry of Ministry of EducationShanghai Key Laboratory of Rare Earth Functional MaterialsCollege of Chemistry and Materials ScienceShanghai Normal UniversityShanghai 200234China 

出 版 物：《Transactions of Tianjin University》 (天津大学学报（英文版）)

年 卷 期：2024年第30卷第2期

页      面：130-139页

核心收录：

学科分类：080602[工学-钢铁冶金] 081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 08[工学] 070304[理学-物理化学(含∶化学物理)] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 070207[理学-光学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the National Key Research and Development Program of China (No. 2020YFA0211004) Key Grant of Nation Science Funding of China (No. 22236005) Nation Science Funding of China (No. 22376141) Ministry of Education of China (No. PCSIRT_IRT_16R49) “111” Innovation and Talent Recruitment Base (D18020) Shanghai Government (No. 20ZR1440700) Shanghai Engineering Research Center of Green Energy Chemical Engineering (No. 18DZ2254200) Scientific and Technological Innovation Team for Green Catalysis and Energy Materialien Yunnan Institutions of Higher Learning, and Surface project of Yunnan Province science and technology Department (No. 20210 A070001-050) 

主　　题：Fe-PEI-CN bifunctional catalyst Photo-Fenton p-chlorophenol(p-ClPhOH)degradation Synergetic effect 

摘      要：Deep degradation of organic pollutants by sunlight-induced coupled photocatalytic and Fenton (photo-Fenton) reactions is of immense importance for water purification. In this work, we report a novel bifunctional catalyst (Fe-PEI-CN) by codoping graphitic carbon nitride (CN) with polyethyleneimine ethoxylated (PEI) and Fe species, which demonstrated high activity during p-chlorophenol (p-ClPhOH) degradation via H_(2)O_(2) from the photocatalytic process. The relationship between the catalytic efficiency and the structure was explored using diff erent characterization methods. The Fe modification of CN was achieved through Fe-N coordination, which ensured high dispersion of Fe species and strong stability against leaching during liquid- phase reactions. The Fe modification initiated the Fenton reaction by activating H_(2)O_(2) into ·OH radicals for deep degradation of p-ClPhOH. In addition, it eff ectively promoted light absorption and photoelectron-hole (e-h ^(+) ) separation, corresponding to improved photocatalytic activity. On the other hand, PEI could significantly improve the ability of CN to generate H_(2)O_(2) through visible light photocatalysis. The maximum H_(2)O_(2) yield reached up to 102.6 μmol/L, which was 22 times higher than that of primitive CN. The cooperation of photocatalysis and the self-Fenton reaction has led to high-activity mineralizing organic pollutants with strong durability, indicating good potential for practical application in wastewater treatment.