RGO/ZnO纳米棒复合材料的合成及光催化性能

采用水热合成法制备ZnO纳米棒及RGO/ZnO纳米棒复合材料。研究不同含量的RGO对RGO/ZnO纳米棒复合材料光催化活性的影响。采用X射线衍射仪(XRD)、场发射电子显微镜(FESEM)、光电子能谱仪(XPS)及漫反射紫外-可见吸收光谱(UV-Vis)检测手段对RGO/ZnO进行表征。结果显示:RGO与ZnO纳米棒成功复合。加入GO的含量不同,获得的RGO/ZnO样品在可见光区域的吸光度值不同。以甲基橙作为模拟污染物的光催化结果表明,RGO/ZnO复合材料具有高的紫外-可见光光降解效率,加入GO与ZnO的质量比为3%时,样品紫外-可见光光催化性能最佳,120min内甲基橙基本可以完全降解;且在波长大于400nm可见光照射下,RGO/ZnO具有一定的可见光活性,180min内其降解甲基橙效率最大可达26.2%。同时,RGO/ZnO具有较好的光稳定性。

Synthesis and Photocatalytic Performance of RGO/ZnO Nanorod Composites

ZnO nanorods and RGO/ZnO nanorods composites were prepared by hydrothermal method . The influence of RGO content on the photocatalytic activity of RGO/ZnO nanorods composites was studied . ZnO nanorods and RGO/ZnO nanocomposites were characterized by X‐ray diffraction (XRD) ,field emission electron microscopy (FESEM ) ,X‐ray photoelectron spectroscopy (XPS) and diffuse reflectance UV‐visible absorption spectroscopy techniques .The results show that RGO/ZnO samples are synthesized successfully .With different additions of GO ,the RGO/ZnO samples obtained exhibit different absorption characteristics in visible light region .The photocatalytic results of using methyl orange (MO) as the simulated pollutant show that RGO/ZnO nanorods composites exhibit high degradation efficiency under UV‐Vis light illumination .The highest photocatalytic performance is obtained for RGO/ZnO composites w hen the mass ratio of RGO to ZnO is 3% .M O is almost com‐pletely degraded in 120min .RGO/ZnO also shows the visible‐light‐driven photocatalytic activity under visible light illumination (λ> 400nm) ,and the maximum MO degradation efficiency in 180min can reach 26 .2% ,meanwhile ,RGO/ZnO samples exhibit good photostability .