High photocatalytic capability of self-assembled nanoporous WO3 with preferential orientation of (002) planes
High photocatalytic capability of self-assembled nanoporous WO3 with preferential orientation of (002) planes
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DOI：
10.1021/es062546c
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发表时间：
2007-06-15
影响因子：
11.4
通讯作者：
Chen, Shuo
中科院分区：
文献类型：
--
作者：
Guo, Yafeng;Quan, Xie;Chen, Shuo
在0.2wt%NaF和0.3%（V/V）HF（1：1）的混合溶液中，通过阳极氧化在钨片上成功地合成了具有（002）择优取向的纳米多孔氧化钨（WO 3）。高度有序的自组装结构的孔具有约70 nm的平均尺寸。X射线衍射分析表明，WO 3晶体为单斜晶系，（002）晶面择优取向良好。在高压汞灯照射下，自组装纳米多孔WO 3的最大光电转换效率为17.2%。在高压汞灯和紫外灯照射下，自组装纳米多孔WO 3光催化剂对五氯苯酚（PCP）的光催化降解性能优于WO 3薄膜和TiO 2纳米管阵列。
Self-assembled nanoporous tungsten oxide (WO3) with preferential orientation (002) planes was successfully synthesized on the tungsten sheet by anodization in a 0.2 wt % NaF and 0.3% (V/V) HF mixture solution in a 1:1 ratio. The pores, of a highly ordered self-assembled structure, had an average size of approximately 70 nm. X-ray diffraction identified a monoclinic WO3 structure and fine preferential orientation of (002) planes. A maximum photoconversion efficiency of 17.2% was obtained for the self-assembled nanoporous WO3 under high-pressure mercury lamp illumination. The photocatalytic (PC) degradation of pentachlorophenol (PCP) in aqueous solution using the self-assembled nanoporous WO3 photocatalyst, performed under both high-pressure mercury lamp and Xe lamp illumination, showed more excellent PC capability than WO3 film and TiO2 nanotube arrays.