Photocatalytic Performances of Ag3PO4 Polypods for Degradation of Dye Pollutant under Natural Indoor Weak Light Irradiation

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• 作者：Fei Teng ; Zailun Liu ; An Zhang ; Min Li
• 刊名：Environmental Science & Technology
• 出版年：2015
• 出版时间：August 18, 2015
• 年：2015
• 卷：49
• 期：16
• 页码：9489-9494
• 全文大小：471K
• ISSN：1520-5851

文摘

It is still a big challenge for Ag₃PO₄ to be applied in practice mainly because of its low stability resistant to photo corrosion, although it is an efficient photocatalyst. Herein, we have mainly investigated its activity and stability under indoor weak light for the degradation of dye pollutants. It is amazing that under indoor weak light irradiation, rhodamine B (RhB) can be completely degraded by Ag₃PO₄ polypods after 36 h, but only 18% of RhB by N-doped TiO₂ after 120 h. It is found that under indoor weak light irradiation, the degradation rate (0.08099 h^鈭?) of RhB over Ag₃PO₄ polypods are 46 times higher than that (0.00173 h^鈭?) of N-doped TiO₂. The high activity of Ag₃PO₄ polypods are mainly attributed to the three-dimensional branched nanostructure and high-energy {110} facets exposed. After three cycles, surprisingly, Ag₃PO₄ polypods show a high stability under indoor weak light irradiation, whereas Ag₃PO₄ have been decomposed into Ag under visible light irradiation with an artificial Xe light source. This natural weak light irradiation strategy could be a promising method for the other unstable photocatalysts in the degradation of environmental pollutants.