Shifu C, Mingsong J, Yunguang Y
Department of Chemistry, Huaibei Normal University, Anhui, Huaibei, 235000, People's Republic of China.
J Nanosci Nanotechnol. 2012 Jun;12(6):4898-904. doi: 10.1166/jnn.2012.4886.
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 degrees 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.
采用可控共沉淀法制备了硫化锌-硫化铜纳米颗粒，并通过球磨法制备了硫化锌-硫化铜-三硫化二铈纳米颗粒。通过扫描电子显微镜、X射线粉末衍射、透射电子显微镜和对苯二甲酸光致发光探测技术对光催化剂进行了表征。通过光催化还原重铬酸根离子、硝基苯以及光催化氧化甲基橙来评估光催化剂的光催化活性。结果表明，硫化锌-硫化铜的最佳制备条件为200℃反应7小时。三硫化二铈-硫化锌-硫化铜光催化剂中三硫化二铈的最佳掺杂量为1.0 wt%，最佳球磨时间为16小时。对于硫化锌-硫化铜光催化剂，甲基橙的光氧化效率和重铬酸根离子的光还原效率分别为27.4%和60.7%；对于三硫化二铈-硫化锌-硫化铜光催化剂，它们分别为73.6%和83.1%。硫化锌-硫化铜和三硫化二铈-硫化锌-硫化铜制备苯胺的产率分别为25.4%和31.3%。还讨论了影响光催化活性的机理。
