期刊
SYMMETRY-BASEL
卷 13, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/sym13091682
关键词
heterogeneous photocatalysis; faceted anatase; decahedral anatase; octahedral anatase; morphology; symmetry; photocatalytic activity
资金
- National Natural Science Foundation of China (NSFC) [51802087]
- Natural Science Foundation of the Hubei province of China [2019CFB524]
- Ministry of Education and Culture, Sport, Science and Technology-Japan (MEXT)
- Ministry of Education and Science of Poland
Different properties like particle aspect ratio, density of electron traps, and morphology have been found to control the photocatalytic activity in various reaction systems, impacting water oxidation, methanol dehydrogenation, and oxidative decomposition of acetic acid. While morphology plays a significant role, symmetry does not seem to control the photocatalytic performance in this study.
Decahedral anatase particles (DAPs) have been prepared by the gas-phase method, characterized, and analyzed for property-governed photocatalytic activity. It has been found that depending on the reaction systems, different properties control the photocatalytic activity, that is, the particle aspect ratio, the density of electron traps and the morphology seem to be responsible for the efficiency of water oxidation, methanol dehydrogenation and oxidative decomposition of acetic acid, respectively. For the discussion on the dependence of the photocatalytic activity on the morphology and/or the symmetry other titania-based photocatalysts have also been analyzed, that is, octahedral anatase particles (OAP), commercial titania P25, inverse opal titania with and without incorporated gold NPs in void spaces and plasmonic photocatalysts (titania with deposits of gold). It has been concluded that though the morphology governs photocatalytic activity, the symmetry (despite its importance in many cases) rather does not control the photocatalytic performance.
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