氧化锌/石墨烯复合物的固相制备及气敏、光催化应用

Solid-phase synthesis of ZnO/graphene nanocomposites and their gas sensing and photocatalytic properties

通过室温固相法制得氧化锌/石墨烯(ZnO/G)复合材料,并利用X射线衍射仪、透射电子显微镜和荧光光谱仪等对复合材料进行表征。考察了ZnO/G复合材料的气敏和光催化性能,并与ZnO进行了比较。结果表明,将ZnO/G复合材料制成气敏元件,其比ZnO对于乙醇蒸汽有更高的响应灵敏度和较好的选择性。复合材料对水溶液中罗丹明B也有较好的光降解性能,在紫外光照射80 min后,其对染料有机物的降解率达94%以上,优于纳米ZnO。

ZnO/graphene(ZnO/G)nanocomposite is prepared by a solid-phase reaction method at room temperature.The structure of the product is characterized by XRD,TEM,and fluorescence spectrometer.The gas-sensitive and photocatalytic properties of ZnO/G nanocomposite are studied and compared with that of ZnO nanoparticles.It is shown that ZnO/G nanocomposite is superior to ZnO nanoparticles.A gas sensor is made from ZnO/G nanocomposite,which exhibits higher response sensitivity and better selectivity to ethanol vapor than that made from ZnO.The nanocomposite shows a good photodegradation to Rhodamine B in aqueous solution.After taking UV irradiation for 80 min,the degradation rate of RhB ZnO/G nanocomposite exceeds 94%,better than that of ZnO.