Electrochemically assisted photocatalysis: titania particulate film electrodes for photocatalytic degradation of 4-chlorophenol
Electrochemically assisted photocatalysis: titania particulate film electrodes for photocatalytic degradation of 4-chlorophenol
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DOI：
10.1021/j100137a033
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发表时间：
1993-09
期刊：
影响因子：
--
通讯作者：
K. Vinodgopal;S. Hotchandani;P. Kamat
中科院分区：
文献类型：
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作者：
K. Vinodgopal;S. Hotchandani;P. Kamat
市售的 TiO[sub 2] 粉末（Degussa P25）已用于在导电玻璃板上制备微粒薄膜。这些半导体颗粒膜具有光电化学活性，具有类似于n型半导体的性质。可以通过施加外部阳极偏压来抑制光生电荷载流子之间的复合。电子清除剂，例如氧气，通过竞争光生电子来影响光电流的产生。这些颗粒薄膜提供了一种通过施加外部偏压来加速光催化反应的便捷方法。例如，当 TiO[sub 2] 颗粒膜电极在紫外光解过程中保持在外部阳极偏压（0.6 V vs SCE）时，4-氯苯酚的光催化降解速率大大增加。 26 个参考文献，6 个图。
A commercially available TiO[sub 2] powder (Degussa P25) has been used to prepare thin particulate films on conducting glass plates. These semiconductor particulate films are photoelectrochemically active with properties similar to an n-type semiconductor. The recombination between the photogenerated charge carriers can be suppressed by applying an external anodic bias. Electron scavengers, such as oxygen, affect the photocurrent generation by competing for the photogenerated electrons. These particulate films provide a convenient method for accelerating the photocatalytic reaction by applying an external bias. For example, the rate of photocatalytic degradation of 4-chlorophenol greatly increases when the TiO[sub 2] particulate film electrode is maintained at an external anodic bias (0.6 V vs SCE) during the UV photolysis. 26 refs., 6 figs.