Simple Ethanol Impregnation Treatment Can Enhance Photocatalytic Activity of TiO2 Nanoparticles under Visible-Light Irradiation

被引：77
|
作者：
Kong, Lina [1 ,2 ]
Jiang, Zhiqiang [3 ]
Wang, Changhua [1 ,2 ]
Wan, Fangxu [1 ,2 ]
Li, Yingying [1 ,2 ]
Wu, Liangzhuan [4 ]
Zhi, Jin-Fang [4 ]
Zhang, Xintong [1 ,2 ]
Chen, Shijian [3 ]
Liu, Yichun [1 ,2 ]
机构：
[1] NE Normal Univ, Minist Educ, Ctr Adv Optoelect Funct Mat Res, Changchun 130024, Peoples R China
[2] NE Normal Univ, Minist Educ, Key Lab UV Emitting Mat & Technol, Changchun 130024, Peoples R China
[3] Chongqing Univ, Sch Phys, Chongqing 401331, Peoples R China
[4] Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China
来源：
ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 14期
基金：
对外科技合作项目（国际科技项目）;
关键词：
TiO2; visible light photocatalyst; ethanol impregnation; oxygen vacancy; density functional calculation; DOPED TIO2; OXYGEN; DEFECTS; CARBON; LEADS;
D O I：
10.1021/acsami.5b00888
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Doping with impurities as well as introducing oxygen vacancies has been recognized as an important means to enhance photocatalytic activity of TiO2 under visible-light irradiation. Here we report that simple ethanol impregnation followed with mild heat treatment (150-400 degrees C) can color TiO2 nanoparticles and enhance visible-light photocatalytic activity of the material. The coloration and photocatalytic activity for beta-naphthol and rhodamine B (RhB) degradation were observed to be dependent on heat-treatment temperature, and the highest activity as well as the most coloration was obtained at temperatures around 200 to 250 degrees C. Comprehensive analyses based on X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) investigations as well as first-principle density functional calculation suggest that the simple ethanol impregnation treatment leads to the generation of oxygen vacancy on TiO2 surface which should be responsible for the coloration and enhanced photocatalytic activity.
引用
收藏
页码：7752 / 7758
页数：7
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