期刊
THIN SOLID FILMS
卷 539, 期 -, 页码 23-28出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2013.04.135
关键词
Zinc oxide; Thin films; Superhydrophilic; Photocatalysis; Growth mechanism
类别
资金
- National Natural Science Foundation of China [11004071]
- Key Foundation of Educational Commission of Anhui Province [KJ2012A250, KJ2010A306]
- Natural Science Foundation of Anhui Province [11040606 M10, 11040606 M64]
- Huaibei Science and Technology Development Funds [20110305]
Superhydrophilic functional materials have been found to be of great value for a variety of practical applications in recent years. In this paper, zinc oxide (ZnO) microrod films have been directly synthesized on a large-area zinc substrate via a simple solution method. Morphological and structural observation and crystallinity of the grown products were carried out using scanning electron microscopy, X-ray diffraction, energy dispersive spectrometer, transmission electron microscopy, ultraviolet (UV)-vis diffuse reflectance spectroscopy and photoluminescence (PL) spectroscopy. The influence of reaction time on the size and shapes of the as-prepared ZnO samples was studied. It was found that superhydrophilic ZnO films at reaction time of 20 h were made up of uniform pure ZnO microrods with 600 nm in average diameter and 6 mu m in length. Room-temperature PL spectra of the ZnO products showed a UV emission and a broad green band. Photocatalytic performance and sample stability were studied. Under UV light irradiation over 95% of methylene blue was degraded by ZnO microrod films in 4 h, ZnO microrod film can be easily separated from the solution, and no observable performance degradation was observed after 5 cycles. (C) 2013 Elsevier B.V. All rights reserved.
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