Structure, chemical state and photocatalytic activity of TiO2-x nanostructured thin films by glancing angle deposition technique
Structure, chemical state and photocatalytic activity of TiO2-x nanostructured thin films by glancing angle deposition technique
复制标题
掠射角沉积TiO2-x纳米结构薄膜的结构、化学态和光催化活性
DOI：
10.1016/j.jallcom.2017.05.041
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发表时间：
2017-09-05
影响因子：
6.2
通讯作者：
Shao, Jianda
中科院分区：
文献类型：
--
作者：
Wang, Bin;Qi, Hongji;Shao, Jianda
Nonstoichiometric titanium dioxide nanostructured thin film (TNF) has attracted a range of interest in the green energy field. In this paper, we introduce the glancing angle deposition (GLAD) technique to produce the amorphous TNFs with discrete nanoscale columnar structures. In order to improve the crystallinity and/or gain the Ti3+ doped states, amorphous TNFs were annealed at 400 C-omicron in air or H-2. XRD, SEM, AFM, XPS and PL were used to characterize the crystallization structure morphology, chemical state, PL properties of the TNFs with different annealing conditions. Photocatalytic activities of the samples were reflected by decolorization experiments of methylene blue (MB) solution irradiated by the simulated sunlight light of AM 1.5 G. The photocatalytic activity of amorphous TNF is higher than that of conventional TiO2 thin film, indicating the prominent properties of nanostructures. Compared with annealing in air, the photocatalytic activity of TiO2-x nanostructures annealed in hydrogen is further increased and higher. The results demonstrated that Ti3+ and oxygen vacancies were beneficial and played the dominant role for the enhancement of photocatalytic activity. (C) 2017 Published by Elsevier B.V.
