Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524
Qrcode

Article

Condensed Matter

J. Korean Phy. Soc. 2011; 59(4): 2750-2755

Published online October 14, 2011     https://doi.org/10.3938/jkps.59.2750

Copyright © The Korean Physical Society.

Enhanced Photocatalytic Properties due to Electron-rich Ti-ion Doping in ZnFe2O4 under Visible Light Irradiation

Pramod H. Borse, Jum Suk Jang, Jae Sung Lee, F. Nawaz Khan, Myoung Gyu Ha, Jong Pil Kim, Jong Seong Bae, Euh Duck Jeong, Hyun Gyu Kim

Abstract

The substitution effect of Ti4+ at Fe3+ site in ZnFe2O4, a spinel-phase system, has been studied and further optimized to fabricate an efficient photocatalyst. The material doped with electron donor (Ti+4), ZnFe2 − xTixO4 with an optimum composition of x=0.06 exhibited a unchanged band gap, but generated two times higher photocurrent, and showed enhanced quantum yield (upto 0.77%) for photodecomposition of H2O-CH3OH mixture, than undoped material under visible light ((¥ë¡Ã420 nm). In contrast, the material doped with very high concentration of Ti revealed deteriorated photochemical properties due to constituent impurity phases. The higher electron density by n-type doping seems to be responsible for the more efficient charge separation in ZnFe2−xTixO4 (0.01 £¼ x £¼ 0.09), and hence, the high photocatalytic activity.

Keywords: ZnFe2O4, Visible light, Photocatalytic activity, Photocatalysts, ,