Visible-light sensitive La_1?xBa_xCoO₃ photocatalyst for malachite green degradation

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• 作者：Chunqiu Zhang ; Hongcai He ; ^{hehc@uestc.edu.cn} ; Ning Wang ; Haijun Chen ; Deting Kong
• 关键词：Ba-doped LaCoO3 ; Photocatalysis ; Degradation ; Malachite green
• 刊名：Ceramics International
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：39
• 期：4
• 页码：3685-3689
• 全文大小：528 K

文摘

In this study, a series of photocatalyst La_1?xBa_xCoO₃ (x=0, 0.1, 0.3, 0.5, 0.7) powders were successfully prepared using the sol-gel method. The crystal structure and band gap of La_1?xBa_xCoO₃ were characterized by X-ray diffraction and Ultraviolet-visible diffuse reflection spectroscopy for photocatalysis investigation. The results showed that the Ba-doped LaCoO₃ exhibited obvious absorption characteristics in visible light regions. In addition, the effect of La_1?xBa_xCoO₃ on the photocatalytic degradation of malachite green under different light sources was also investigated. Ba-doped LaCoO₃ showed excellent visible-light sensitive photocatalytic activities and a maximum photocatalytic degradation of malachite green could be achieved with a degradation degree of 97 % by La_0.7Ba_0.3CoO₃ in visible light for 60 min.