Fabrication of a Z-Scheme Heterojunction Polyhedral-Shaped BiOIO3/MIL-53(Fe) Photocatalyst for Enhancing Gaseous Hg0 Removal

被引：25
作者：
Guo, Jianwen [1 ]
Wu, Jiang [1 ,3 ]
Guan, Yu [2 ]
Wang, Jianmin [1 ]
Liu, Qizhen [4 ]
Mao, Xu [1 ]
Qi, Xuemei [1 ]
He, Ping [1 ]
Wang, Huaning [1 ]
机构：
[1] Shanghai Univ Elect Power, Coll Energy & Mech Engn, Shanghai 200090, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Energy & Power Engn, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
[3] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
[4] Shanghai Environm Monitoring Ctr, Shanghai 200030, Peoples R China
来源：
ENERGY & FUELS | 2021年 / 35卷 / 04期
基金：
上海市自然科学基金; 中国国家自然科学基金;
关键词：
D O I：
10.1021/acs.energyfuels.0c03376
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A Z-scheme heterojunction polyhedral-shaped BiOIO3/MIL-53(Fe) photocatalyst is prepared by a solvothermal method. The samples are characterized by XRD, XPS, SEM, TEM, FT-IR, UV-vis, PL, and other material characterization analysis methods. The photocatalytic performance of photocatalysts is studied for removal of vapor-phase mercury (Hg-0) under visible-light irradiation. The results suggest that the Hg-0 removal efficiency of the BiOIO3/MIL-53(Fe) composite is significantly improved compared with that of MIL-53(Fe). When the molar ratio of BiOIO3 and MIL-53(Fe) is 2:1, the BiOIO3/MIL-53(Fe) composite photocatalyst exhibits the best Hg-0 removal efficiency, reaching 74.19%. BiOIO3 and MIL-53(Fe) form a Z-scheme heterojunction with a suitable energy band structure, which results in the effective separation of photoinduced electron-hole pairs and delays their recombination. Finally, the photocatalytic oxidation mechanism of Hg-0 by the BiOIO3/MIL-53(Fe) composite is proposed, which paves the way for the study of the built-in electric field and electron transport channels between binary photocatalyst materials.
引用
收藏
页码：3252 / 3265
页数：14
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