Photoelectrocatalytic hydrogen evolution and synchronous degradation of organic pollutants by pg-C_(3)N_(4)/β-FeOOH S-scheme heterojunction  

作　　者：LI XiBao HAN Tao ZHOU YingTang XIE Yu LUO YiDan HUANG JunTong CHEN Zhi DENG Fang 

机构地区：[1]School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China [2]National-Local Joint Engineering Research Center of Heavy Metal Pollutants Control and Resource Utilization,Nanchang Hangkong University,Nanchang 330063,China [3]Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control,National Engineering Research Center for Marine Aquaculture,Marine Science and Technology College,Zhejiang Ocean University,Zhoushan 316022,China

出　　处：《Science China(Technological Sciences)》2024年第4期1238-1252,共15页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.22262024,22272070,and 52272063);Jiangxi Province Academic and Technical Leader of Major Disciplines(Grant No.20232BCJ22008);Key Project of Natural Science Foundation of Jiangxi Province(Grant No.20232ACB204007);Double Thousand Talent Plan of Jiangxi Province,State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering(Grant No.2022-K31);the Zhejiang Province Key Research and Development Project(Grant No.2023C01191)。

摘　　要：Crafting photoelectrocatalytic materials with robust oxidation-reduction properties for simultaneous hydrogen evolution and pollutant degradation poses a formidable challenge.In this study,a pg-C_(3)N_(4)/β-FeOOH S-scheme heterostructure with a special energy band structure was developed by anchoring porous pg-C_(3)N_(4)on needle shapedβ-FeOOH.Functioning as a hole extraction layer,needle-leaf-likeβ-FeOOH can facilitate efficient hole migration and enhance charge transport.Remarkably,the optimized 0.2-pg-C_(3)N_(4)/β-FeOOH could degrade 78%of ofloxacin(OFLO)in 90 min.The organic pollutants could absorb a large number of holes,which prompted a greater proportion of photogenerated electrons to actively participate in the hydrogen evolution reaction at the cathode.Consequently,the hydrogen production of 0.2-pg-C_(3)N_(4)/β-FeOOH reached 1452.88μmol cm^(-2)h^(-1),exhibiting a notable increase of 61.81-165.12μmol cm^(-2)h^(-1)compared with that in the absence of pollutants.Experimental and theoretical calculation results underscore that this investigation is grounded in a distinctive electron and hole dual channel transfer mechanism.These findings offer novel insights for the future development of S-scheme heterojunction photoelectrocatalytic materials capable of concurrently degrading pollutants and promoting hydrogen evolution.

关 键 词：PHOTOELECTROCATALYSIS hydrogen evolution degradation SYNCHRONOUS S-scheme heterojunction 

分 类 号：X703[环境科学与工程—环境工程] TQ116.2[化学工程—无机化工] TQ426