In Situ Quantification of H2O2 Generated on Photocatalytic BiVO4 Films by Chemical Micromotors

被引：2

作者：

Duan, Shifang ^{[1
]}

Lu, Weilong ^{[2
,3
]}

Peng, Yixin ^{[1
]}

Xie, Yingxu ^{[4
]}

Kuang, Ting ^{[5
]}

Zhang, Guan ^{[4
]}

Wang, Wei ^{[1
]}

机构：

[1] Harbin Inst Technol Shenzhen, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China

[2] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 101400, Peoples R China

[3] Univ Chinese Acad Sci, Sch Nanosci & Technol, Beijing 100049, Peoples R China

[4] Harbin Inst Technol Shenzhen, Sch Civil & Environm Engn, State Key Lab Urban Water Resource & Environm, Shenzhen 518055, Peoples R China

[5] Harbin Inst Technol Shenzhen, Educ Ctr Expt & Innovat, Shenzhen 518055, Peoples R China

来源：

ACS APPLIED NANO MATERIALS | 2024年 / 7卷 / 12期

基金：

中国国家自然科学基金;

关键词：

photocatalysis; hydrogenperoxide; in situquantification; micromotor; sensing; HYDROGEN-PEROXIDE; REAL-TIME; MOTION; PH;

D O I：

10.1021/acsanm.4c02031

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Silver-coated Janus micromotors that self-propel in H2O2 are used to measure the H2O2 concentration produced on the surface of a photocatalytic BiVO4 film, because the motor speeds correlate linearly with the H2O2 concentration in the range of 0.5-1 mM. After UV exposure (780 mW/cm(2) for 40 s), a local H2O2 concentration of 0.72 mM on the film surface was inferred from the motor speeds, 75 times higher than the bulk average measured by iodometry. The micromotor sensors also help identify the optimal Pt loading on a BiVO4 film for highest H2O2 production and regions of high photocatalytic activity on a nonuniform BiVO4 film.

引用

页码：13936 / 13942

页数：7

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