Synthesis and Characterization of Ce2S3–ZnS–CuS Nanoparticles and Their Photocatalytic Activity
Abstract:ZnS–CuS nanoparticles were prepared by a controlled coprecipitation method and ZnS–CuS–Ce2S3 nanoparticles were prepared by ball milling. The photocatalysts were characterized by scanning electron microscopy, X-ray powder diffraction, transmission electron microscopy, and terephthalic acid photoluminescence probing technique. The photocatalytic activity of the photocatalysts was evaluated by photocatalytic reduction of Cr2O7 2–, nitrobenzene and photocatalytic oxidation of methyl orange. The results showed that the optimal preparation condition of ZnS–CuS is 200 °C for 7 h. The optimal doped amount of Ce2S3 for Ce2S3–ZnS–CuS photocatalyst is 1.0 wt%, and the optimal ball milling time is 16 h. For the ZnS–CuS photocatalyst, the photooxidation efficiency of methyl orange and the photoreduction efficiency of Cr2O7 2– were 27.4% and 60.7%, respectively; and for Ce2S3–ZnS–CuS photocatalysts, they were 73.6% and 83.1%, respectively. The production efficiency of aniline for ZnS–CuS and Ce2S3–ZnS–CuS were 25.4% and 31.3%, respectively. The mechanisms of influence on the photocatalytic activity were also discussed.
Document Type: Research Article
Publication date: 2012-06-01
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