Ex) Article Title, Author, Keywords
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.
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
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, ,
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