期刊
APPLIED SURFACE SCIENCE
卷 258, 期 4, 页码 1587-1591出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2011.10.003
关键词
ZnO; Cu doping; Photocatalysis; Sol-gel; Methyl orange
类别
资金
- Chongqing Key Natural Science Foundation (CSTC) [2008BA4012]
- Program for Chongqing innovative Research Team development in University [KJTD201020]
- Scientific and technology projects in Chongqing (CSTC) [2009AC4066]
- National Natural Science Foundation of China [51108487]
Cu-doped ZnO nanoparticles were prepared by a sol-gel method for the first time. XRD, XPS, UV-vis and FS techniques were used to characterize the Cu-doped ZnO samples. The photocatalytic activity was tested for methyl orange degradation under UV irradiation. The results show that the crystal sizes of ZnO and 0.5% Cu/ZnO nanoparticles with wurtzite phase are 32.0 and 28.5 nm, indicating that Cu-doping hinder the growth of crystal grains. The doped Cu element existed as Cu2+. The optimal Cu doping concentration in ZnO is 0.5%. The optimal calcination condition is at 350 degrees C for 3 h. The MO degradation rate of 0.5% Cu/ZnO reaches 88.0% when initial concentration of MO is 20 mg/L, exceeding that of undoped ZnO. The enhanced charge carrier separation and increased surface hydroxyl groups due to Cu-doping contributed to the enhanced photocatalytic activity of 0.5% Cu/ZnO. (C) 2011 Elsevier B.V. All rights reserved.
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