Synthesis and photocatalytic performance of novel CdS quantum dots sensitized Bi₂WO₆ photocatalysts

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• 作者：Lei Ge ; ^a ; ^{gelei08@sina.com"" rel=""nofollow} ; Jing Liu^a
• 关键词：Quantum dots ; Photocatalysis ; Nanoparticles ; Functional ; Semiconductors
• 刊名：Materials Letters
• 出版年：2011
• 出版时间：30 June 2011
• 年：2011
• 卷：65
• 期：12
• 页码：1828-1831
• 全文大小：741 K

文摘

Novel quantum dots sensitized CdS-Bi₂WO₆ composite photocatalysts were synthesized to improve the visible-light-driven photocatalytic performance. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) UV–vis diffuse reflectance spectra (DRS). The photocatalytic activities of QDs sensitized CdS-Bi₂WO₆ samples were investigated based on the decomposition of methyl orange under visible light irradiation (λ > 420 nm). The DRS results revealed that CdS-Bi₂WO₆ samples have a red shift and stronger absorption in the visible light region. After being sensitized by quantum dots CdS, the Bi₂WO₆ samples showed the high efficiency for the degradation of methyl orange. This study may provide an approach to treatment of organic pollutants by using visible light.