期刊
CURRENT APPLIED PHYSICS
卷 12, 期 4, 页码 1229-1233出版社
ELSEVIER
DOI: 10.1016/j.cap.2012.03.007
关键词
Er3+-doped TiO2; Methylene blue (MB); Electrospinning; Nanorods; Photocatalytic activity; Catalyst
资金
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0007095]
- Ministry of Knowledge Economy (MKE), Republic of Korea [RTI04-01-02]
- Korea Institute of Industrial Technology(KITECH) [RTI04-01-02] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2010-0007095] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Photocatalytic degradation of methylene blue (MB) in water was examined using Er3+-doped TiO2 (Er -TiO2) nanorods prepared by a sol-gel derived electrospinning, calcination, and subsequent mechanical grinding. Different concentrations of Er dopant in the range of 0-1.0 mol% were synthesized to evaluate the effect of Er content on the photocatalytic activity of TiO2. Among Er3+-TiO2 catalysts, the 0.7 mol% Er3+-TiO2 catalyst showed the highest MB degradation rate. The degradation kinetic constant (k) increased from 1.0 x 10(-3) min(-1) to 5.1 x 10(-3) min(-1) with the increase of Er3+ doping from 0 to 0.7 mol%, but decreased down to 2.1 x 10(-3) min(-1) when Er3+ content was 1.0 mol%. It can be concluded that the degradation of MB under UV radiation was more efficient with Er3+-TiO2 catalyst than with pure TiO2. The higher activity might be attributed to the transition of 4f electrons of Er3+ and red shifts of the optical absorption edge of TiO2 by erbium ion doping. (c) 2012 Elsevier B. V. All rights reserved.
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