Journal
JOURNAL OF CATALYSIS
Volume 297, Issue -, Pages 65-69Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2012.09.019
Keywords
Cr doping; Oxygen vacancies; Visible light-induced photocatalysts; Persistent fluorescence; Irradiation intensity
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Funding
- Management Expenses Grants for National Universities Corporations from the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT) [20360293, 22651022]
- National Research Foundation (NRF) of Korea under the Global Research Laboratory (GRL) program
- International Sci. & Tech. Cooperation Foundation of Gansu Province, China [090WCGA903]
- Grants-in-Aid for Scientific Research [22241017, 20360293] Funding Source: KAKEN
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The photocatalytic degradation of nitrogen monoxide (deNO(x)) in the gas phase was investigated in a continuous reactor using a strontium titanate-based composite semiconductor, CaAl2O4:(Eu, Nd)/Cr-doped SrTiO3, and CaAl2O4:(Eu. Nd)/oxygen vacancy-induced SrTiO3 catalysts. Cr doping and oxygen vacancies generation could narrow the band gap of SrTiO3 and affect the photocatalytic performance to varying degrees. The photocatalytic activity of SrTiO3 toward LED light (445 nm)-induced photocatalytic deNO(x) can be greatly improved by the nonstoichiometric synthesis of SrTiO3, mainly due to oxygen deficiency generation. CaAl2O4:(Eu, Nd)/Cr-doped SrTiO3 composites possessed superiority in NO removal under persistent fluorescence irradiation (440 nm) after the mercury lamp with wavelength larger than 290 nm was turned off. (c) 2012 Elsevier Inc. All rights reserved.
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