您的位置:首页  > 论文页面

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:1199  下载量:134
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.
 
1 评论数 0
暂无评论
友情链接