期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 182, 期 8, 页码 2061-2067出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2009.03.022
关键词
Home-made water-soluble tantalum precursor; Tantalum-doped ZnO nanocrystals; Visible light; Photocatalytic degradation; Methylene blue decomposition
资金
- Natural Science Foundation of China and Jiangsu Province [50672036, 10704035, BK2006122]
- State Key Program for Basic Research of China [2006CB921805, 2009ZX02101-4, 2009CB929500]
- 333 Talents in Jiangsu Province and SRF for ROCS, SEM
This paper describes a novel catalyst of the Ta-doped ZnO nanocrystals prepared by a modified polymerizable complex method using the water-soluble tantalum precursor as the sources of Ta. The catalysts were characterized by means of various analytical techniques as a function of Ta content (x = 0-4 mol%) systematically. A remarkable advantage of the results was confirmed that dopant Ta enhanced the visible-light absorption of ZnO and the low-solubility tantalum doping could restrain the growth of crystal and minish the particle size. The relationship between the physicochemical property and the photocatalytic performance was discussed, and it was found that the photocatalytic activity in the photochemical degradation of methylene blue under visible-light irradiation (lambda >= 420nm) was dependent on the contents of the dopant, which could affect the particle size, concentration of surface hydroxyl groups and active hydrogen-related defect sites, and the visible-light absorption. The highest photocatalytic activity was obtained for the 1.0 mol% Ta-doped ZnO sample. (C) 2009 Elsevier Inc. All rights reserved.
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