期刊
SOLID STATE SCIENCES
卷 62, 期 -, 页码 112-120出版社
ELSEVIER
DOI: 10.1016/j.solidstatesciences.2016.11.006
关键词
Titanium dioxide; Photocatalyst; Ag-decorated; Ag decoration; Photodegradation
资金
- National Chi Nan University
- Ministry of Science and Technology, Taiwan
Ag decoration on TiO2 is favorable to absorption of visible light and wider absorption range. Ag nanoparticles playing the role of electron receivers on TiO2 surface enhance photodegradation. However, excess Ag nanoparticles caused reduced specific surface area of photocatalysts and increased probability of charge recombination, resulting in lower photocatalytic efficiency. In this study, the influence of various Ag decoration concentrations on photocatalytic activity was investigated. Surface treatment by nitric acid after Ag decoration was performed to avoid excessive Ag deposition. The extent of Ag elimination and its impacts on photocatalytic activity were also explored. An optimum Ag content in the photocatalyst was achieved and photocatalytic efficiency was obviously improved. It was found that the number of calcination times affected the crystallinity and stability of photocatalysts. Better photocatalytic efficiency could be obtained after twice calcinations. (C) 2016 Elsevier Masson SAS. All rights reserved.
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