石墨烯/氧化锌复合材料的制备及光催化性能研究

Preparation and Photocatalytic Properties of Graphene/Zinc Oxide Composites

采用水热法,将GO与ZnO复合以提高纳米ZnO的光催化活性,成功制备出石墨烯/氧化锌GO/ZnO复合材料,并采用X射线衍射仪(XRD)、拉曼光谱等对复合材料的结构进行了系统表征,以亚甲基蓝为模型污染物,研究其在紫外光下的光催化性能。主要考察了水热反应温度和水热反应时间对石墨烯/氧化锌复合材料光催化性能的影响。实验结果表明,当水热反应温度为200℃,水热时间为24h,所制得的石墨烯/氧化锌复合材料光催化性能最佳,在60min内对亚甲基蓝降解率达到92.7%,经重复使用三次后,降解率依然可以达到80.2%,具有一定的重复使用性。

The Graphene / Zinc Oxide （GO/ZnO） composites are prepared by hydrothermal method combined with GO and ZnO in order to improve the photocatalytic activity of ZnO nanocomposites. The X - ray diffrac- tion （XRD） and Raman spectroscopy are used to study the photocatalytic properties of the composites. The photocatalytic activity of the GO/ZnO composites are evaluated by the degradation of methylene blue under UV light. The effects of hydrothermal reaction temperature and hydrothermal reaction time on the photocatalytic performance of GO/ZnO composites are investigated. The results show that when the hydrothermal reaction temperature is ：200 ~C and the hydrothermal time is 24h, the degradation ratio of methylene blue is up to 92. 78% after 60 min of irradiation under UV light, after being repeated three times, the degradation ratio can still reach to 80.2%.