氧化石墨烯掺杂对氧化锌气敏性能的影响

Effect of graphene oxide doping on gas-sensing properties of zinc oxide

通过水热法和Hummers法分别制备纳米氧化锌和氧化石墨烯(GO),采用物理球磨法进行掺杂实现对纳米氧化锌改性,并对掺杂氧化锌的气敏性能进行测试。利用X射线衍射(XRD)、扫描电子显微镜(SEM)对样品进行结构和形貌表征,考察GO质量分数对氧化锌形貌和气敏性能的影响。结果表明,掺杂质量分数为3%GO的氧化锌对体积分数为100μL/L乙醇的响应值(S=R_(a)/R_(g))达到153.504,是掺杂前的4倍。GO掺杂纳米ZnO可作为检测乙醇气体的新型传感材料。

Nano zinc oxide and graphene oxide(GO)are prepared by hydrothermal method and Hummers method,respectively.The prepared nano zinc oxide is doped and modified by GO through physical ball milling method,and the gas-sensing performance of doped nano zinc oxide is tested.The structure and morphology of the doped nano zinc oxide samples are characterized by mean of X-ray diffraction(XRD)and scanning electron microscope(SEM),and the influence of GO doping amount on the morphology and gas sensitivity of zinc oxide is explored.The gas sensitivity test results show that the response value(S=R_(a)/R_(g))of zinc oxide doped with 3wt%GO to ethanol at a concentration of 100 ppm reaches 153.504,which is four times that before doping.GO-doped nano-ZnO can be used as a new sensor material for detecting ethanol gas.