Z-scheme photocatalytic production of hydrogen peroxide over Bi4O5Br2/g-C3N4 heterostructure under visible light

被引：248

作者：

Zhao, Xuesong ^{[1
,3
,4
]}

You, Yingying ^{[2
,5
]}

Huang, Shaobin ^{[2
,5
]}

Wu, Yixiao ^{[2
,5
]}

Ma, Yiyang ^{[1
,3
,4
]}

Zhang, Guan ^{[6
]}

Zhang, Zhenghua ^{[1
,3
,4
]}

机构：

[1] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Inst Environm Engn & Nanotechnol, Shenzhen 518055, Guangdong, Peoples R China

[2] South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Minist Educ, Guangzhou 510006, Peoples R China

[3] Tsinghua Univ, Guangdong Prov Engn Res Ctr Urban Water Recycling, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Guangdong, Peoples R China

[4] Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China

[5] South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Sch Environm & Energy, Guangzhou 510006, Peoples R China

[6] Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen HITSZ, Shenzhen 518055, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 278卷

基金：

中国国家自然科学基金;

关键词：

Hydrogen peroxide; Bi4O5Br2; Carbon nitride; Z-scheme heterostructure; Visible light photocatalysis; GRAPHITIC CARBON NITRIDE; BI-RICH BI4O5BR2; H2O2; PRODUCTION; G-C3N4; NANOSHEETS; EFFICIENT PHOTOCATALYST; SELECTIVE PRODUCTION; CO2; CONVERSION; GRAPHENE; ULTRATHIN; WATER;

D O I：

10.1016/j.apcatb.2020.119251

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photocatalytic production of hydrogen peroxide from water and oxygen is a promising technique due to the green and sustainable solar-to-chemical energy conversion. However, in the absence of organic sacrificial agents as electron donors, the relatively low photocatalytic H2O2 productivity is still far from satisfactory. Herein, we present a Z-scheme photocatalytic production of hydrogen peroxide over Bi4O5Br2/g-C3N4 heterostructure under visible light without additive organics. The obtained Bi4O5Br2/g-C3N4 heterostructure exhibited a highest H2O2 production of 124 mu M in 60 min by a Z-scheme photocatalytic mechanism. The photoinduced electrons of Bi4O5Br2 combine with the holes of g-C3N4 at the contact interface, and the e(-) and h(+) of the heterostructure are mainly derived from the conduction band of g-C3N4 and valence band of Bi4O5Br2, respectively. As such, more e(-) and h(+) of Bi4O5Br2/g-C3N4 heterostructure are available to reduce oxygen and oxidize water, respectively, with more O-center dot(2)- and (OH)-O-center dot generated and thus more H2O2 produced.

引用

页数：11

共 63 条

[1] Ultrathin Bi4O5Br2 nanosheets for selective photocatalytic CO2 conversion into CO [J].