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

Yuan Bai ¹Shuangjun Li ¹Bolin Yin ¹Jinpeng Zhao ¹Hexing Li¹

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作者信息

1. Key Laboratory of Resource Chemistry of Ministry of Education,Shanghai Key Laboratory of Rare Earth Functional Materials,College of Chemistry and Materials Science,Shanghai Normal University,Shanghai 200234,China
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Abstract

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 dur-ing p-chlorophenol(p-ClPhOH)degradation via H2O2 from the photocatalytic process.The relationship between the catalytic efficiency and the structure was explored using different 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 H2O2 into OH radicals for deep degradation of p-ClPhOH.In addition,it effectively 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 H2O2 through visible light photocatalysis.The maximum H2O2 yield reached up to 102.6 pmol/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.

Key words

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

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基金项目

国家重点研发计划(2020YFA0211004)

Key Grant of Nation Science Funding of China(22236005)

Nation Science Funding of China(22376141)

教育部项目(PCSIRT_IRT_16R49)

高等学校学科创新引智计划(111计划)(D18020)

Shanghai government(20ZR1440700)

Shanghai Engineering Research Center of Green Energy Chemical Engineering(18DZ2254200)

Scientific and Technological Innovation Team for Green Catalysis and Energy Materialien Yunnan Institutions of Higher Learning()

Surface project of Yunnan Province science and technology Department(20210A070001-050)

出版年

2024

天津大学学报(英文版)

天津大学

天津大学学报(英文版)

影响因子：0.343

ISSN：1006-4982

参考文献量44

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