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Ag/TiO2纳米管阵列光电催化性能研究
发表时间：2018-01-15 浏览量：1799 下载量：250
| 全部作者： | 薛鹏，尹云超，万俊，刘恩周，胡晓云，樊君 |
| 作者单位： | 西北大学化工学院；西北大学物理学院 |
| 摘 要： | 通过两步阳极氧化法和微波辅助化学还原法制备负载Ag的TiO2纳米管阵列（Ag/TiO2 nanotube arrays，Ag/TiO2 NTs）。研究发现，Ag/TiO2 NTs在紫外-可见光区吸收强度明显提高，且在可见光范围内产生新的吸收峰，这归因于Ag的局域表面等离子体效应。此外，Ag/TiO2 NTs复合物中光生电子-空穴对的复合率降低。实验表明，Ag/TiO2 NTs展现出更高的光电流密度，Ag/TiO2 NTs的光致发光（photoluminescence，PL）强度远低于纯TiO2 NTs的PL强度，这表明Ag/TiO2 NTs的光生电子和空穴的复合被抑制。Ag/TiO2 NTs对亚甲基蓝的降解结果表明其光电催化效果最好。 |
| 关 键 词： | 化学反应工程；TiO2纳米管阵列；Ag纳米粒子；等离子体效应；阳极氧化法 |
| Title： | Study of photoelectrocatalytic activities of Ag/TiO2 nanotube arrays |
| Author： | XUE Peng, YIN Yunchao, WAN Jun, LIU Enzhou, HU Xiaoyun, FAN Jun |
| Organization： | School of Chemical Engineering, Northwest University; School of Physics, Northwest University |
| Abstract： | Highly ordered TiO2 nanotube arrays (TiO2 NTs) were prepared by a two-step anodization method and Ag nano-particles (Ag NPs) were loaded on the surface of TiO2 nanotube arrays (Ag/TiO2 NTs) through a microwave-assisted chemical reduction route. A stronger absorption in the ultraviolet-visible light region and a new absorption in the visible region were observed, which were attributed to local surface plasma effect of Ag NPs. Furthermore, the recombination of photo-induced electron-hole pairs was suppressed after depositing Ag nanoparticles. The results showed that the photocurrent density of Ag/TiO2 NTs was greater than that of bare TiO2 NTs. Besides, the photoluminescence (PL) intensity of Ag/TiO2 NTs was much lower than that of bare TiO2 NTs, revealing a decrease in recombination of photo-induced electron-hole pairs. It was observed that the Ag/TiO2 NTs showed the highest photoelectrocatalytic activity during the degradation of methylene blue (MB). |
| Key words： | chemical reaction engineering; TiO2 NTs; Ag NPs; plasma effect; anodization method |
| 发表期数： | 2018年1月第1期 |
| 引用格式： | 薛鹏，尹云超，万俊，等. Ag/TiO2纳米管阵列光电催化性能研究[J]. 中国科技论文在线精品论文，2018，11（1）：67-72. |
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