Reduced graphene oxide/CdWO4 (RGO-CdWO4) composite photocatalysts were prepared by a simple one-pot hydrothermal method. Namely, the reduction of graphene oxide and the growth of CdWO4 crystal occurred simultaneously in one single process. The obtained samples were characterized by X-ray diffraction, scanning electron microscopy, nitrogen adsorption, UV-vis reflection spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. The photocatalytic activities of the as-prepared samples were investigated by degradation of methylene blue under UV light irradiation. An enhancement in photocatalytic activity was observed with RGO-CdWO4 composites compared with pure CdWO4. We also investigated the effect of the amount of graphene on the photocatalytic activity of the as-prepared composite photocatalysts. The results showed that there was an optimal amount of 2%. The mechanism of enhancement of the photocatalytic activity was also discussed.
通过简单的一锅
水热法制备了还原氧化
石墨烯/CdWO4(RGO-CdWO4)复合光催化剂。也就是说,氧化
石墨烯的还原和 CdWO4 晶体的生长同时进行。所得样品通过 X 射线衍射、扫描电子显微镜、氮吸附、紫外-可见反射光谱、拉曼光谱和 X 射线光电子能谱进行了表征。通过在紫外光照射下降解
亚甲基蓝,研究了所制备样品的光催化活性。与纯 CdWO4 相比,RGO-CdWO4 复合材料的光催化活性有所提高。我们还研究了
石墨烯含量对所制备复合光催化剂光催化活性的影响。结果表明,
石墨烯的最佳用量为 2%。我们还讨论了提高光催化活性的机理。