文献类型：期刊文献

英文题名：Iodine doped Z-scheme Bi2O2CO3/Bi2WO6 photocatalysts: Facile synthesis, efficient visible light photocatalysis, and photocatalytic mechanism

作者：Qiang, Zhuomin[1];Liu, Ximeng[1];Li, Feng[1,2];Li, Taihai[1,2];Zhang, Meng[3];Singh, Harishchandra[2];Huttula, Marko[2];Cao, Wei[2]

机构：[1]Xiangtan Univ, Coll Chem, Key Lab Environm Friendly Chem & Applicat, Minist Educ, Xiangtan 411105, Peoples R China;[2]Univ Oulu, Nano & Mol Syst Res Unit, Fac Sci, POB 3000, FIN-90014 Oulu, Finland;[3]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2021

卷号：403

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20203108996516);WOS:【SCI-EXPANDED(收录号:WOS:000579752500056)】；

基金：The work was financially supported by the Academy of Finland (311934), Funds for the Central Universities (Nos. 222201714018) and China Scholarship Council.

语种：英文

外文关键词：Photocatalytic; I-doped Bi2O2CO3/Bi(2)WO(6)d; Solvothermal; Z-scheme; Density functional theory calculation

摘要：The Bi-based hierarchical multi-component photocatalytic system is an important player in energy and environmental catalysis due to its full-spectrum light absorption and stable separation of photo-generated charges. In this study, a novel family of iodine doped Bi2O2CO3/Bi2WO6 heterojunctions was successfully developed by a facile ionic liquid assisted solvothermal method. A visible light photocatalytic H-2 production rate of 664.5 mu mol g(-1) h(-1) (0.3I-Bi2O2CO3/Bi2WO6 with 3% Pt) has been durably obtained, much higher than those of pristine and undoped counterparts. The photocatalysts are also capable for persistent pollutant and dye degradation. Through electrochemical and spectroscopic tests and density functional theory calculation, the enhanced photocatalytic activity is attributed to formation of the Z-scheme photocatalyst. Therein, the lowered and indirect bandgap and heterojunctional band alignment spontaneously benefit visible light harvesting, electron-hole pair separation, and proton reduction. Besides a facile synthesis for effective photocatalysis, the Z-scheme mechanism is hoped to facilitate the design and realization of similar systems for photocatalytic H-2 evolution and organic hazards decontamination.