Preparation of Cu₂O/exfoliated graphite composites with high visible light photocatalytic performance and stability

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• 作者：Qiang Zhao ; Junli Wang ; Zuopeng Li ; Yongsheng Qiao ; Chun Jin ; ^{jinchun0828@126.com" class="auth_mail" title="E-mail the corresponding author} ; Yong Guo ; ^{ybsy_guo@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Exfoliated graphite ; Cu2O ; Composites materials ; Surfaces ; Visible light
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：15 August 2016
• 年：2016
• 卷：42
• 期：11
• 页码：13273-13277
• 全文大小：1826 K

文摘

Cu₂O/exfoliated graphite composites (Cu₂O/EG (1 wt%), Cu₂O/EG (4 wt%), Cu₂O/EG (7 wt%), Cu₂O/EG (10 wt%), and Cu₂O/EG (15 wt%)) were prepared by the precipitation method. The photocatalytic activity of the material was evaluated using the decolorization of methyl orange (MO) solution as model reaction. Results showed that Cu₂O deposited on the worm-like flakes of EG in the form of nanocrystals. The EG provided a three-dimensional environment for photocatalytic reaction and endowed a high adsorption capacity for the sample. Under optimal conditions, the decolorization efficiencies of MO for 60 min reached 96.7%. Recycling of the catalyst showed Cu₂O/EG composites (10 wt%) to possess high photocatalytic efficiency even when repeatedly used for five times.