期刊
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
卷 61, 期 1, 页码 73-79出版社
KOREAN PHYSICAL SOC
DOI: 10.3938/jkps.61.73
关键词
Photocatalyst; CaFe2O4; MgFe2O4; Photocatalytic activity; Bulk hetero-junction
资金
- Korea Basic Science Institute (KBSI) [C32223]
- Hydrogen Energy RD Center, Korea
The effect substitution of Ti4+ at the Fe4+ site in a CaFe2O4-MgFe2O4 bulk hetero-junction (BH) lattice photocatalyst was explored and the Ti ion concentration was optimized to fabricate an efficient photocatalyst. A BH consisting of an optimum dopant concentration (Ti+4) level of x = 0.03 exhibited an increased band gap and generated a 1.5 times higher photocurrent. The newly fabricated Ti ion doped photocatalyst showed an enhanced quantum yield (upto similar to 13.3%) for photodecomposition of a H2O-CH3OH mixture, as compared to its undoped BH counterpart under visible light (lambda a parts per thousand yen 420 nm). In contrast, the material doped with a very high Ti-dopant concentration displayed deteriorated photochemical properties. An efficient charge-separation induced by Ti-ion doping seems to be responsible for the higher photocatalytic activity in a doped bulk BH.
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