化工进展2019，Vol.38Issue(3)：1403-1410,8.DOI:10.16085/j.issn.1000-6613.2018-0582
Au@TiO2纳米管阵列的制备及光催化性能
Preparation and photocatalytic properties of Au@TiO2 nanotube arrays
摘要
Abstract
A simple, feasible and controllable method is presented to prepare uniform Au@TiO2 nanotube arrays by depositing Au nanofilms on the top of the TiO2 nanotube arrays via magnetron sputtering. The TiO2 nanotube arrays is obtained using the anodization process at room temperature, followed by heat treatment at 450℃ in air for 2 h. The heat treatment leads to the migration of Au atoms into TiO2 nanotube arrays, resulting in the formation of the Au nanocrystals on the outer surface of the TiO2, i.e. the Au@TiO2 nanotube arrays. The microstructure of the prepared Au@TiO2 nanotube arrays is characterized by using scanning electron microscopy, energy dispersive spectrometer, X-ray diffraction and transmission electron microscopy. Also, the emporal evolution of photocurrent response, photoluminescence emission spectrum, UV-vis diffuse reflection spectra and photodegration of the methylene blue are used to evaluate its photoelectric and photocatalytic properties. Compared with pure TiO2 nanotube arrays, the Au@TiO2 nanotube arrays catalysts have much higher photocatalytic activity in the aqueous methylene blue solution under visible light irradiation. Such behavior can be contributed to the enhanced electro-hole separation and the reduced recombination of them through the localized surface plasmon resonance (LSPR) of Au nanoparticles.关键词
Au@TiO2纳米管/Au纳米粒子/纳米薄膜制备/阳极氧化/磁控溅射/催化剂/光催化性能Key words
Au@TiO2 nanotube arrays/Au nanoparticles/nanofilms preparation/anodization/magnetron sputtering/catalyst/photocatalytic property分类
化学化工引用本文复制引用
周琱玉,李涛涛,王辉,乔珺威,梁伟..Au@TiO2纳米管阵列的制备及光催化性能[J].化工进展,2019,38(3):1403-1410,8.基金项目
国家自然科学基金(51474152) （51474152）
