Activation of photocatalytic water oxidation on N-doped ZnO bundle-like nanoparticles under visible light

Zong, Xu and Sun, Chenghua and Yu, Hua and Chen, Zhi Gang and Xing, Zheng and Ye, Delai and Lu, Gao Qing (Max) and Li, Xinyong and Wang, Lianzhou (2013) Activation of photocatalytic water oxidation on N-doped ZnO bundle-like nanoparticles under visible light. The Journal of Physical Chemistry C, 117 (10). pp. 4937-4942. ISSN 1932-7447

Abstract

Nitrogen-doped ZnO bundle-like nanoparticles were prepared by heating ZnOHF precursor at different temperatures under an ammonia atmosphere. ZnOHF gradually transformed to N-ZnO with the increase of the heating temperature, and the as-prepared N-ZnO nanoparticles preserved the original morphologies of ZnOHF at moderate heating temperature. The N-ZnO nanoparticles demonstrated drastically enhanced absorption in the visible region compared with the commercial ZnO and N-ZnO derived from commercial ZnO. Theoretical calculations indicated that the contribution of nitrogen to the top of the valence band (VB) of ZnO plays the major role of extending the absorption of ZnO to the visible region. The as-prepared N-ZnO showed high photocatalytic activity for the visible-light-induced water oxidation, and the activity can be further greatly enhanced by loading IrO2 cocatalyst. To our knowledge, this is the first report of realizing photocatalytic water oxidation on non-metal-doped ZnO under visible light without applied bias, thus adding new value to the band gap engineering of benchmark ZnO for efficient solar energy utilization.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 19 Jun 2017 05:41
Last Modified: 19 Jun 2017 05:41
Uncontrolled Keywords: ammonia atmosphere; band gap engineering; enhanced absorption; heating temperatures; high photocatalytic activities; photo-catalytic; theoretical calculations; water oxidation; inorganic compounds; chemical reactions; chemistry; nanotechnology; naval vessels; energy utilization; atmospheric properties
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030302 Nanochemistry and Supramolecular Chemistry
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/jp311729b
URI: http://eprints.usq.edu.au/id/eprint/31714

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