金红石
煅烧
光催化
材料科学
氧气
化学工程
二氧化钛
钛
钝化
无机化学
矿物学
纳米技术
图层(电子)
催化作用
冶金
化学
有机化学
工程类
作者
Yan Liu,Ping Chen,Yaqi Fan,Yanfei Fan,Xifeng Shi,Guanwei Cui,Bo Tang
出处
期刊:Nanomaterials
[MDPI AG]
日期:2020-05-09
卷期号:10 (5): 920-920
被引量:12
摘要
Colored titanium oxides are usually unstable in the atmosphere. Herein, a gray rutile titanium dioxide is synthesized by two-step calcination successively in a high-temperature reduction atmosphere and in a lower-temperature air atmosphere. The as-synthesized gray rutile TiO2 exhibits higher photocatalytic activity than that of white rutile TiO2 and shows high chemical stability. This is attributed to interior oxygen vacancies, which can improve the separation and transmission efficiency of the photogenerated carriers. Most notably, a formed surface passivation layer will protect the interior oxygen vacancies and provide long-term photocatalytic activity.
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