Preparation and Photoelectrocatalytic Performance of Ru Loaded TiO2 Nanotubes

被引：0
|
作者：
Wang Z. [1 ]
Shen Z. [1 ]
Li Y. [1 ]
Zuo J. [1 ]
机构：
[1] China National Light Industry Key Laboratory of Functional Ceramic Materials, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, 333403, Jiangxi
来源：
Xiyou Jinshu/Chinese Journal of Rare Metals | 2020年 / 44卷 / 06期
关键词：
Junctions; Methyl orange; Photocatalysis; Ru loading; Titanium dioxide; Visible light;
D O I：
10.13373/j.cnki.cjrm.XY18120018
中图分类号：
学科分类号：
摘要：
TiO2 nanotubes loaded with Ru nanoparticles composite photocatalysts (Ru/TiO2)were synthesized by combining anodic oxidation and pulsed electrodeposition method, whose diameter, wall thickness and length were 40~70 nm, 10 nm and 1 μm, respectively, realizing homogeneous deposition of Ru nanoparticles on the surface of TiO2 nanotubes.The effects of the RuCl3 concentration and calcination temperature on the microstructure, optical absorption behavior and photocatalytic activities of the nanotubes were also investigated. The results showed that Ru loading could decrease the band gap energy and make the absorption edges of the samples red shifting. Anatase titania and a small amount of rutile titania formed heterojunction, and photogenerated electrons were trapped by Ru nanoparticles, which promoted the separation of photogenerated electron-hole pairs. In addition, the external bias voltage could promote the separation of photogenerated electron-hole pairs and improve the degradation efficiency further. By Ru loading, the ratios of photocatalytic and photoelectrocatalytic degradation of methyl orange for 1 h increased from 38.6% and 48.5% to 52.0% and 70.5% under ultraviolet light, and increased from 7.1% and 17.2% to 36.3% and 75.2% under visible light with the RuCl3 concentration of 0.05 mol•L-1 and calcination at 600℃. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
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页码：609 / 615
页数：6
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