SUSTAINED WATER CLEAVAGE BY VISIBLE-LIGHT
SUSTAINED WATER CLEAVAGE BY VISIBLE-LIGHT
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DOI：
10.1021/ja00411a010
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发表时间：
1981-01-01
影响因子：
15
通讯作者：
GRATZEL, M
中科院分区：
文献类型：
--
作者：
BORGARELLO, E;KIWI, J;GRATZEL, M
通过使用由Pt和RuOz组成的双功能氧化还原催化剂，并由胶体tio2颗粒共负载，在水溶液中实现了4量子可见光对水的持续裂解。采用Ru (bpy) 32+为敏化剂，甲基紫素（MV2+）为电子继电器的光化学模型体系，考察了催化剂组成、敏化剂浓度、pH和温度对光致水分解效率的影响。无电子继电器系统也表现出高的光活性。在没有增敏剂和继电器的情况下，紫外光的直接带隙照射可导致有效的水裂解。
Sustainedcleavage of water by 4 quanta of visible light is achievedin aqueous solutions by using a bifunctional redox catalyst composed of Pt and RuOz cosupported by colloidalTi02 particles. A photochemical model system containing Ru (bpy) 32+ as a sensitizer and methyl viologen (MV2+) as an electron relay is used to test the effect of catalyst composition, sensitizer concentration, pH, and temperature on the efficiency of light-induced water decomposition. Electron relay free systems also exhibit high photoactivity. Direct band gap irradiation by UV light leads to efficient water cleavage in the absence of sensitizer and relay.