ENHANCED PHOTODEGRADATION OF RHODAMINE B BY Tb DOPED MESOPOROUS TiO2 WITH ANATASE/RUTILE HETEROJUNCTION

被引：0

作者：

Wu, Qiliang ^{[1
]}

He, Qinqin ^{[1
]}

Fei, Xia ^{[1
]}

Liu, Xueting ^{[1
]}

He, Bing ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Chem Engn, Anhui Key Lab Controllable Chem React & Mat Chem, Hefei 230009, Anhui, Peoples R China

来源：

FRESENIUS ENVIRONMENTAL BULLETIN | 2013年 / 22卷 / 11A期

关键词：

Tb doping; Mesoporous titania; anatase/rutile heterojunction; Photocatalytic activity; PHOTOCATALYTIC ACTIVITY; THIN-FILMS; DEGRADATION; RUTILE; FABRICATION; ROUTE;

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Tb doped mesoporous TiO2 photocatalysts with pure anatase phase or mixed phases of anatase and ruffle were synthesized via the evaporation induced self-assembly (EISA) process. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), Photoluminescence (PL) spectra, N-2 adsorption-desorption and X-ray photoelectron spectroscopy (XPS) techniques. The degradation of Rhodamine B (RhB) under visible light irradiation was investigated. Analytical results demonstrate that the amount of Tb doping is crucial to affect the photocatalytic ability of the mesoporous titania. Among the samples, 0.5%Tb doped mesoporous TiO2 exhibits the highest photocatalytic activity due to the synergistic effects of the Tb doping-derived multiple favorable factors and the anatase/rutile heterojunction induced large specific surface area and efficient separation of electron-hole pairs. In addition, the photogenerated holes and electrons are found to be both active species for the photodegyadation of RhB.

引用

页码：3308 / 3316

页数：9

共 39 条

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