Superior photocatalytic performance by vertically aligned core–shell TiO2/WO3 nanorod arrays
Superior photocatalytic performance by vertically aligned core–shell TiO2/WO3 nanorod arrays
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DOI：
10.1016/j.catcom.2009.01.010
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发表时间：
2009-03
影响因子：
3.7
通讯作者：
Wilson A. Smith;Yiping Zhao
中科院分区：
文献类型：
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作者：
Wilson A. Smith;Yiping Zhao
采用两种不同材料、不同沉积角度的连续掠射角沉积方法，制备了WO 3-核-壳结构的TiO 2纳米结构，其光催化性能比非晶单层TiO 2薄膜提高了70倍，比晶态（α）TiO 2薄膜提高了13倍，比c-TiO 2/a-WO 3双层薄膜提高了3倍。TiO 2负载量少得多。我们认为，光催化增强的机制是从增加的电荷分离的电子-空穴对的密度由WO 3层，两层之间的界面面积，和大的表面积从多孔纳米结构的辅助。
Using two consecutive regarding glancing angle depositions at different deposition angles and with different materials, a WO3-core TiO2-shell nanostructure has been fabricated and has photocatalytic enhancement up to 70 times over amorphous single layer TiO2thin films, 13 times enhancement over crystalline (anatase) TiO2thin films, and 3 times enhancement over c-TiO2/a-WO3two-layer thin films, with much less the load of TiO2. We believe that the mechanism for the photocatalytic enhancement is from the increased density of charge separated electron-hole pairs aided by the WO3layer, the interfacial area between the two-layers, and the large surface area from the porous nanostructure.