Visible light photodegradation of methylene blue by AgBr–TiO2/SiO2@Fe3O4 magnetic photocatalysts--颗粒学报PARTICUOLOGY

Liu, J., Zuo, S., Yu, L., Yu, Y., Li, B., & Chen, P. (2013). Visible light photodegradation of methylene blue by AgBr–TiO2/SiO2@Fe3O4 magnetic photocatalysts. Particuology, 11(6), 728–731. https://doi.org/10.1016/j.partic.2013.01.006

Visible light photodegradation of methylene blue by AgBr–TiO₂/SiO₂@Fe₃O₄ magnetic photocatalysts

Jianjun Liu ^a *, Shengli Zuo ^a, Liming Yu ^a, Yingchun Yu ^a, Baoshan Li ^a, Pengwan Chen ^b

a State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
b State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

10.1016/j.partic.2013.01.006

Volume 11, Issue 6, December 2013, Pages 728-731

Received 20 July 2012, Revised 4 December 2012, Accepted 12 January 2013, Available online 23 May 2013.

E-mail: jjliu717@yahoo.com.cn

Highlights

• A new quaternary AgBr–TiO₂/SiO₂@Fe₃O₄ magnetic photocatalyst was prepared.

• Photoactive composites AgBr–TiO₂ were well seeded on SiO₂@Fe₃O₄ magnetic support.

• It exhibited well photocatalytic activity in degradation of methylene blue under visible light.

• The composite photocatalyst is easy to separate for reuse.

Abstract

Visible photoactive AgBr/TiO₂ was immobilized on a SiO₂@Fe₃O₄ magnetic support by solvothermal and sol–gel methods to form a AgBr–TiO₂/SiO₂@Fe₃O₄ magnetic photocatalyst. Samples were characterized by X-ray diffraction, high-resolution transmission electron microscopy and magnetometry. Hetero-structured AgBr/TiO₂ was well seeded on the shell–core SiO₂@Fe₃O₄ structure. The AgBr–TiO₂/SiO₂@Fe₃O₄ magnetic photocatalyst exhibited high photocatalytic activity in the degradation of methylene blue under visible light. The photocatalyst was superparamagnetic, which is beneficial for facile magnetic separation.

Graphical abstract

Keywords

AgBr–TiO₂/SiO₂@Fe₃O₄; Magnetic photocatalyst; Visible light; Methylene blue

文章导读