Synthesis and characterization of B-N co-doped mesoporous TiO2 with enhanced photocatalytic activity

被引:35
作者
He, Tianou [1 ]
Guo, Xiaoling [2 ]
Zhang, Kui [1 ]
Feng, Yaming [2 ]
Wang, Xiangdong [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Sci, Xian 710049, Shaanxi, Peoples R China
[2] Xian Polytech Univ, Sch Text & Mat, Xian 710048, Shaanxi, Peoples R China
关键词
NITROGEN-CODOPED TIO2; VISIBLE-LIGHT; HYDROTHERMAL SYNTHESIS; TITANIA; BORON; DEGRADATION; SOLAR; NANOPARTICLES; REMOVAL; UV;
D O I
10.1039/c3ra44046j
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Boron doped, nitrogen doped, and boron-nitrogen co-doped mesoporous TiO2 photocatalysts were successfully synthesized via a fast sol-gel method. The prepared photocatalysts were characterized by X-ray diffraction (XRD), thermalgravimetric analysis (TGA), UV-vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), N-2 adsorption-desorption, and X-ray photoelectron spectroscopy (XPS). It was found that the photocatalysts have a typical mesostructure and a large specific surface area. Compared with that of the undoped TiO2, the absorption band edges of the doped samples exhibit an evident red-shift and the absorption intensity of the visible region increases obviously. The XPS analysis shows that Ti-N-B-O structures formed on the surface of the boron-nitrogen codoped TiO2, indicating a synergistic effect of the two dopants that enhances the photocatalytic activity. This was evaluated by the degradation of methyl blue (MB), weak acid red (WAR), and rhodamine B (RB) dyes under visible and UV light irradiation.
引用
收藏
页码:5880 / 5886
页数:7
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