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International Journal of Photoenergy
Volume 2015, Article ID 428103, 6 pages
http://dx.doi.org/10.1155/2015/428103
Research Article

Improved Photocatalytic Performance of a Novel Fe3O4@SiO2/Bi2SiO5 Hierarchical Nanostructure with Magnetic Recoverability

School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China

Received 6 August 2015; Accepted 25 October 2015

Academic Editor: Ahmad Umar

Copyright © 2015 Xinxin Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Magnetic Fe3O4@SiO2/Bi2SiO5 composites with a novel hierarchical nanostructure were synthesized by sol-gel and hydrothermal methods and were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and UV-visible diffuse reflectance spectroscopy (UV-vis DRS). It was found that the introduction of Fe3O4@SiO2 could turn the morphology of Bi2SiO5 from close-grained slab to hollow hierarchical architecture with fabric-structure. The Fe3O4@SiO2/Bi2SiO5 composite showed enhanced photodegradation efficiency for the degradation of reactive brilliant red dye (X-3B) in aqueous solution under simulated sunlight irradiation, as compared with that of commercial P25. In addition, the Fe3O4@SiO2/Bi2SiO5 composite exhibited good magnetic recoverability and excellent photocatalytic stability (no obvious activity loss after recycling tests).