Charge-discharge behavior of TiO2-WO3 photocatalysis systems with energy storage ability
Charge-discharge behavior of TiO2-WO3 photocatalysis systems with energy storage ability
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DOI：
10.1039/b304181f
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发表时间：
2003-01-01
影响因子：
3.3
通讯作者：
Fujishima, A
中科院分区：
文献类型：
--
作者：
Ngaotrakanwiwat, P;Tatsuma, T;Fujishima, A
与WO 3结合的TiO 2已被报道为储能光催化剂，即使在黑暗中也能部分发挥作用。WO 3可以在UV光照射下用在TiO 2处产生的还原能量充电。在这项工作中，充电-放电行为的TiO 2-WO 3薄膜在空气中进行了研究，并与在液体（0.1 M NaCl和水）。评价了其充电速率、放电容量、表观量子产率和自放电速率。在空气中充电的TiO 2-WO 3薄膜，湿度控制这些因素时，紫外光强度为10 mW cm（-2），其中光子供应并不单独控制充电过程。膜上的吸附水层通过膜表面的质子传导和阳极反应所需的水供应，在充电过程中起着重要的作用。
TiO2 coupled with WO3 has been reported as an energy storage photocatalyst, which functions partially even in the dark. The WO3 can be charged with reductive energy generated at the TiO2 under UV light illumination. In this work, charge-discharge behavior of the TiO2-WO3 films in air was studied and compared with that in liquids (0.1 M NaCl and water). Charging rate, discharge capacity, apparent quantum yield and self-discharging rate for electron storage were evaluated. In the charging of the TiO2-WO3 film in air, humidity controls those factors when the UV light intensity was 10 mW cm(-2), where photon supply does not solely control the charging process. The adsorbed water layer on the film should play an important role in the charging process, via the proton conduction at the film surface and water supply for the anodic reaction.