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

By Xuesong Zhao, Yingying You, Shaobin Huang, Yixiao Wu, Yiyang Ma, Guan Zhang, Zhenghua Zhang. 2020

260 citations recorded by the source corpus.

Abstract 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 μM 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 ·O2− and ·OH generated and thus more H2O2 produced.

View Paper: https://www.semanticscholar.org/paper/abee43e95387304956d082dc0f36e6eeaae037ce