Correlation between the photocatalysis and growth mechanism of SnO2 nanocrystals

Zhan, Hongquan and Deng, Ce and Shi, Xiao-Lei ORCID: https://orcid.org/0000-0003-0905-2547 and Wu, Chuanqi and Li, Xiaohong and Xie, Zhipeng and Wang, Changan and Chen, Zhi-Gang ORCID: https://orcid.org/0000-0002-9309-7993 (2020) Correlation between the photocatalysis and growth mechanism of SnO2 nanocrystals. Journal of Physics D: Applied Physics, 53 (15):154005. pp. 1-9. ISSN 0022-3727

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Abstract

Due to the special structural defects, SnO2-based nanomaterials show full potentials for applying to photocatalysis. In this work, we explore the relationship between photocatalysis and growth mechanism of SnO2 nanocrystals. Through a pH-modifying method, the growth of SnO2 nanocrystals follows Ostwald Ripening (OR) mode at pH=9, and Oriented Attachment (OA) mode at pH=1.5, respectively. We comprehensively studied the structural characteristics of SnO2 nanocrystals by investigating high-resolution transmission electron microscope, X-ray diffraction, Brunauer–Emmett–Teller nitrogen physisorption, UV-vis diffuses reflectance, and photoluminescence spectra, and the results with growth dynamic simulation show that OA mode is obviously different from OR mode, and the photocatalytic performance of SnO2 nanocrystals varies under different growth mechanisms. The factors including crystal structure, particle size, and defects are all responsible for the variation of photocatalytic performance during OR or OA growth. Our study indicates that the photocatalytic performance of SnO2 nanocrystals can be tuned by the controlling of crystal growth mode.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 22 Jun 2020 00:37
Last Modified: 10 Feb 2021 22:05
Uncontrolled Keywords: Growth mechanism; Photocatalysis; SnO2
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
Identification Number or DOI: https://doi.org/10.1088/1361-6463/ab6b96
URI: http://eprints.usq.edu.au/id/eprint/37947

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