Optimization of energy storage TiO2-WO3 photocatalysts and further modification with phosphotungstic acid
Optimization of energy storage TiO2-WO3 photocatalysts and further modification with phosphotungstic acid
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DOI：
10.1016/j.jelechem.2004.07.012
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发表时间：
2004-12-01
影响因子：
4.5
通讯作者：
Tatsuma, T
中科院分区：
文献类型：
--
作者：
Ngaotrakanwiwat, P;Tatsuma, T
能量存储TiO 2-WO 3光催化剂，保持防腐和杀菌效果，即使在黑暗中，在还原能量存储在WO 3的基础上，优化的表观量子产率，容量和比容量（x在HxWO 3）的光电化学充电的膜在气相中。当W/Ti比为0.5，膜厚大于或等于10 μ m时，获得最大的表观量子产率（接近8%）。当W/Ti = 0.5时，薄膜的容量最大，且随着薄膜厚度的增加而增加。在所考察的范围内，比容量（近似于0.10）几乎与参数无关。虽然在干燥条件下（湿度接近10%RH）充电速率和容量很低，但用磷钨酸对优化后的TiO 2-WO 3光催化剂进行改性，大大改善了这些特性。(C)2004 Elsevier B. V.保留所有权利。
Energy storage TiO2-WO3 photocatalysts, which retain anticorrosion and bactericidal effects, even in the dark, on the basis of reductive energy stored in WO3, are optimized in terms of apparent quantum yield, capacity and specific capacity (x in HxWO3) for photoelectrochemical charging of the film in the gas phase. The maximal apparent quantum yield (similar to8%) is obtained at a W/Ti ratio of 0.5, and a film thickness greater than or equal to 10 mum. The capacity is largest at W/Ti = 0.5, and increases with the film thickness. The specific capacity (similar to0.10) is almost independent of the parameters in the range examined. Although the charging rate and capacity are very low under dry conditions (humidity similar to10% RH), modification of the optimized TiO2-WO3 photocatalysts with phosphotungstic acid greatly improves these characteristics. (C) 2004 Elsevier B.V. All rights reserved.