Photocatalytic degradation of organic pollutants with Ag decorated free-standing TiO2 nanotube arrays and interface electrochemical response
Photocatalytic degradation of organic pollutants with Ag decorated free-standing TiO2 nanotube arrays and interface electrochemical response
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Ag修饰自支撑TiO2纳米管阵列光催化降解有机污染物及界面电化学响应
DOI：
10.1039/c0jm02404j
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发表时间：
2011-01-01
影响因子：
--
通讯作者：
Liang, Changhao
中科院分区：
文献类型：
--
作者：
He, Xingliang;Cai, Yunyu;Liang, Changhao
通过金属纳米颗粒修饰TiO 2允许制造在光电化学应用中具有增强性能的新型纳米复合电极。在这篇文章中，我们报告了一种简便的方法来合成独立的，高度定向的二氧化钛纳米管（TiO 2-NT）阵列的一种新的两步电化学阳极氧化方法，和一个有效的装饰均匀尺寸的Ag纳米粒子的外，内表面的二氧化钛纳米管通过湿-热分解路线。与纯TiO 2-NTs阵列相比，Ag/TiO 2-NTs复合阵列纳米电极对亚甲基蓝染料和五氯苯酚的光催化降解效率提高，Ag纳米颗粒抑制了电子/空穴对的复合，加速了表面电荷转移，从而改善了电极的电化学响应。
Decoration of TiO2 by metal nanoparticles allows for the fabrication of a new nanocomposite electrode with enhanced performance in photo-electrochemical applications. In this article, we report a facile way to synthesize free-standing, highly orientated TiO2 nanotube (TiO2-NT) arrays by a new kind of two-step electrochemical anodization method, and an efficient decoration of uniform sized Ag nanoparticles onto the outer and inner surface of TiO2 nanotubes through a wetting-thermal decomposition route. In particular, compared with pure TiO2-NT arrays, the testing of nanoelectrode made with Ag/TiO2-NTs composite arrays presents enhanced efficiency in photocatalytic degradation of methylene blue dye and organic pollutant of pentachlorophenol, and improved electrochemical responses as results of the suppression of electron/hole pairs from recombination and acceleration of surface charge transfer by Ag nanoparticles.