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Type: Journal article
Title: Z-scheme g-C₃N₄/Bi₄NbO₈Cl heterojunction for enhanced photocatalytic hydrogen production
Other Titles: Z-scheme g-C(3)N(4)/Bi(4)NbO(8)Cl heterojunction for enhanced photocatalytic hydrogen production
Author: You, Y.
Wang, S.
Xiao, K.
Ma, T.
Zhang, Y.
Huang, H.
Citation: ACS Sustainable Chemistry and Engineering, 2018; 6(12):16219-16227
Publisher: American Chemical Society
Issue Date: 2018
ISSN: 2168-0485
Statement of
Yong You, Shuobo Wang, Ke Xiao, Tianyi Ma, Yihe Zhang, and Hongwei Huang
Abstract: Photocatalytic water splitting is promising for sustainable energy development, but it is severely challenged by the low charge separation efficiency and slashing redox potentials requirement. Fabricating a Z-scheme heterojunction as an effective strategy for solving the aforementioned troubles gains enormous efforts. In this work, we develop high-efficiency Z-scheme catalyst g-C3N4/Bi4NbO8Cl based on a facile high-energy ball-milling method to form an intimate interface between the two phases. It exhibits an enormously promoted photocatalytic activity for H2 production with visible-light illumination (λ > 420 nm), and the H2 evolution rate is 6.9 and 67.2 times higher than those of bare g-C3N4 and Bi4NbO8Cl, respectively. The stronger photoabsorption of g-C3N4/Bi4NbO8Cl (beyond 500 nm) allows generation of more photons than does g-C3N4. More importantly, the separation and transfer of photoexcited charge carriers were greatly improved between g-C3N4 and Bi4NbO8Cl, as revealed by the photoelectrochemical and time-resolved photoluminescence decay results. The Z-scheme charge transfer mechanism of g-C3N4/Bi4NbO8Cl was also manifested by electron spin resonance (ESR). The work furnishes a new solution to fabrication of high-efficiency Z-scheme catalysts for countering energy issues.
Keywords: Photocatalytic; g-C3N4 Bi4; NbO8Cl; Z-scheme; hydrogen production
Rights: © 2018 American Chemical Society
DOI: 10.1021/acssuschemeng.8b03075
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Chemistry and Physics publications

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