ZnSnO_(3)/g-C_(3)N_(4)催化剂的制备及其光催化降解性能的研究

Preparation of ZnSnO_(3)/g-C_(3)N_(4)Catalyst and its Photocatalytic Degradation Performance

当前,水污染已经严重影响到人类生存和社会发展。为了解决这个问题,人们利用光催化剂来处理水中污染物。本文选用水热法,以石墨相氮化碳(g-C_(3)N_(4))作为载体,掺杂少量偏锡酸锌制备新型光催化剂来降低水中污染物含量,并研究了该催化剂的最佳制备条件。通过研究该催化剂对罗丹明B的降解效果发现,当掺杂量达到10%,反应温度控制在150℃,反应时间为4 h时制备的ZnSnO_(3)/g-C_(3)N_(4)催化剂的光催化性能最佳。在10 mg/L罗丹明B溶液中加入80 mg该催化剂,当光催化反应时间为100 min时,罗丹明B降解率达到83.61%。利用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、空隙及比表面积测试仪(BET)等对ZnSnO_(3)/g-C_(3)N_(4)催化剂进行检测,了解其形貌特征。

Human survival and social development have been seriously affected by water pollution.In order to solve this problem,photocatalysts are used to treat pollutants in water.A hydrothermal method was chosen to prepare a new photocatalyst used graphite-phase carbon nitride(g-C_(3)N_(4))as a carrier,doped with a small amount of ZnSnO_(3)to reduce the contaminant content in water,and the optimum conditions for the preparation of this catalyst were investigated.The photocatalytic activity of ZnSnO_(3)/g-C_(3)N_(4)catalyst was found to be the best when the amount of doping was 10%,the reaction temperature was controlled at 150℃and the reaction time was 4 hours.When 80 mg of the catalyst was added to 10 mg/L rhodamine B solution,the degradation rate of rhodamine B reached 83.61%when the photocatalytic reaction time was 100 min.The morphological and composition characteristics of ZnSnO_(3)/g-C_(3)N_(4)catalyst were detected by scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD)and BET.