Fabrication of nanostructured CuWO₄ for photocatalytic degradation of organic pollutants in aqueous solution

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• 作者：Zahra Barzgari ; Seyede Zahra Askari…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：28
• 期：4
• 页码：3293-3298
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

In this paper, nanostructured CuWO₄ prepared by precipitation method was characterized using X-ray diffraction analysis, scanning electron microscope, and UV–Vis diffuse reflectance spectroscopy. We evaluated the photocatalytic activity of nanostructured CuWO₄ by the degradation of methylene blue (MB), amido black (AB) and orange G (OG) dyes in aqueous solutions under sunlight irradiation. The degradation efficiency of the three dyes within 120 min followed the order: MB > AB > OG. The results demonstrated that the dyes degradation process follows Langmuir–Hinshelwood first order kinetics. The effect of pH has been studied to the MB decolorization. High photocatalytic efficiency 96 % was observed for the degradation of MB at pH 10 after 120 min under natural sunlight irradiation. The stability of the nanostructured CuWO₄ for the degradation of MB has also been investigated and highly stable performance in recycling photocatalytic reaction was obtained after 5 cycles of use.