AVS 61st International Symposium & Exhibition
    Surface Science Tuesday Sessions
       Session SS-TuP

Paper SS-TuP1
Visible Light Photocatalytic Degradation of Methylene Blue using Ag2O Nanostructures

Tuesday, November 11, 2014, 6:30 pm, Room Hall D

Session: Surface Science Poster Session
Presenter: Szetsen Lee, Chung Yuan Christian University, Taiwan, Republic of China
Authors: Z.-H. Yang, Chung Yuan Christian University, Taiwan, Republic of China
S. Lee, Chung Yuan Christian University, Taiwan, Republic of China
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Various kinds of Ag2O nanostructures were prepared by a precipitation reaction of silver nitrate, ammonium nitrate, and sodium hydroxide with different mixing ratios and temperatures. The band gap values of Ag2O nanostructures were measured using diffuse uv-visible reflectance spectroscopy. The photocatalytic activity of Ag2O nanostructures was tested with the degradation reaction of methylene blue (MB) in aqueous solutions. A halogen lamp with a cut-off filter (> 400 nm) was used as the visible light source. The intensity variation of the 664 nm absorption peak of MB was monitored. The photocatalytic degradation rate of MB varies with the shapes of Ag2O nanocrystals. The degradation rates of MB were correlated with the measured band gap values of Ag2O. The efficiency of visible-light photocatalytic performance of Ag2O nanostructures is discussed.