TiO2/SnO2 double-shelled hollow spheres-highly efficient photocatalyst for the degradation of rhodamine B

TiO2/SnO2 double-shelled hollow spheres are successfully synthesized by two-step liquid-phase deposition method using carbon sphere templates. The formation process of TiO2/SnO2 hollow spheres is discussed. The samples are characterized by X-ray diffraction, scanning electron microscopy, transmissio...

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Bibliographic Details
Published in:Catalysis communications 2015-02, Vol.60, p.129-133
Main Authors: Yuan, Jujun, Zhang, Xianke, Li, Hongdong, Wang, Kai, Gao, Shiyong, Yin, Zhen, Yu, Huajun, Zhu, Xiurong, Xiong, Zuzhou, Xie, Yingmao
Format: Article
Language:English
Subjects:
Hollow spheres
Liquid-phase deposition
Photocatalysis
SnO2
TiO2
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Summary:TiO2/SnO2 double-shelled hollow spheres are successfully synthesized by two-step liquid-phase deposition method using carbon sphere templates. The formation process of TiO2/SnO2 hollow spheres is discussed. The samples are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy and UV–vis absorption spectroscopy. The behavior of photogenerated charges in the TiO2/SnO2 heterojunction structures has been investigated through surface photovoltage spectroscopy. The TiO2/SnO2 hollow spheres which are realized show significantly enhanced photocatalytic activities, with respect to the cases of SnO2 and TiO2 hollow spheres. Furthermore, TiO2/SnO2 hollow spheres show good recyclable photocatalytic activities. •TiO2/SnO2 hollow spheres were fabricated by a two-step LPD using C sphere templates.•TiO2/SnO2 hollow spheres have surface area of 46.1m2/g and mesopore size of 3.5nm.•TiO2/SnO2 hollow spheres show a distinctly stronger SPV response.•TiO2/SnO2 hollow spheres show a superior photocatalytic activity for decomposition of RhB.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2014.11.032