- Title
- Z-scheme g-C₃N₄/Bi₄NbO₈Cl heterojunction for enhanced photocatalytic hydrogen production
- Creator
- You, Yong; Wang, Shuobo; Xiao, Ke; Ma, Tianyi; Zhang, Yihe; Huang, Hongwei
- Relation
- ACS Sustainable Chemistry & Engineering Vol. 6, Issue 12, p. 16219-16227
- Publisher Link
- http://dx.doi.org/10.1021/acssuschemeng.8b03075
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2018
- Description
- 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.
- Subject
- photocatalytic; g-C₃N₄; Bi₄NbO₈Cl; Z scheme; hydrogen production
- Identifier
- http://hdl.handle.net/1959.13/1408967
- Identifier
- uon:35911
- Identifier
- ISSN:2168-0485
- Rights
- This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see: http://dx.doi.org/10.1021/acssuschemeng.8b03075
- Language
- eng
- Full Text
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