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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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

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Title
Enhanced Photocatalytic Properties due to Electron-rich Ti-ion Doping in ZnFe2O4 under Visible Light Irradiation
Other Titles
Enhanced Photocatalytic Properties due to Electron-rich Ti-ion Doping in ZnFe(2)O(4) under Visible Light Irradiation
Author
Borse, Pramod H.Jang, Jum SukLee, Jae SungKhan, F. NawazHa, Myoung GyuKim, Jong PilBae, Jong SeongJeong, Euh DuckKim, Hyun Gyu
Keywords
:HYDROGEN EVOLUTION; WATER; PHOTOANODES; PERFORMANCE; PBBI2NB2O9; OXIDATION; CATALYST; WORKING; CDS
Issue Date
2011-10
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.59, no.4, pp.2750 - 2755
Abstract
The substitution effect of Ti4+ at the Fe3+ site in the spinel-phase ZnFe2O4 system has been studied and further optimized to fabricate an efficient photocatalyst. The material doped with an electron donor (Ti+4), ZnFe2-xTixO4, with an optimum composition of x = 0.06 exhibited a unchanged band gap, which generated two times higher photocurrent and showed an enhanced quantum yield (upto 0.77%) for photodecomposition of a H2O-CH3OH mixture compared to the undoped material under a visible light (lambda >= 420 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 caused by n-type doping seemed to be responsible for the more efficient charge separation in ZnFe2-xTixO4 (0.01 < x < 0.09), and hence, the high photocatalytic activity
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DOI
10.3938/jkps.59.2750
ISSN
0374-4884
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