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Issue 52, 2015
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Enhanced visible light photocatalytic activity of a floating photocatalyst based on B–N-codoped TiO2 grafted on expanded perlite

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Abstract

Floating photocatalysts of boron–nitrogen codoped TiO2 grafted on expanded perlite (B–N-TiO2/EP) were prepared by a facile sol–gel method. The catalysts were characterized by thermogravimetric differential thermal analysis (TG-DTA), X-ray diffraction (XRD), N2 adsorption–desorption (BET), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectroscopy (UV-vis-DRS). The results showed that by modifying the boron doping content in B–N-TiO2/EP, we could effectively obtain photocatalysts with a high BET surface area and porosity. Increasing the boron doping contents would inhibit the transformation of anatase TiO2 to the rutile phase. Compared with N-TiO2/EP, B–N-TiO2/EP exhibits an evident red-shift of the absorption band edge and the absorption intensity of the visible region increases obviously. The enhanced RhB photodegradation rate of B0.57–N-TiO2/EP could reach 94% after 3 h of visible light irradiation. Moreover, the floating photocatalyst could be easily separated and reused, showing great potential for practical applications in environmental cleanup and solar energy conversion.

Graphical abstract: Enhanced visible light photocatalytic activity of a floating photocatalyst based on B–N-codoped TiO2 grafted on expanded perlite

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Article information


Submitted
05 Apr 2015
Accepted
01 May 2015
First published
01 May 2015

RSC Adv., 2015,5, 41385-41392
Article type
Paper

Enhanced visible light photocatalytic activity of a floating photocatalyst based on B–N-codoped TiO2 grafted on expanded perlite

X. Wang, W. Wang, X. Wang, J. Zhang, Z. Gu, L. Zhou and J. Zhao, RSC Adv., 2015, 5, 41385
DOI: 10.1039/C5RA06056G

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