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https://hdl.handle.net/2440/128867
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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 2168-0485 |
Statement of Responsibility: | 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 |
Published version: | http://dx.doi.org/10.1021/acssuschemeng.8b03075 |
Appears in Collections: | Aurora harvest 4 Chemistry and Physics publications |
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