【摘要】 通过化学气相沉积法制备出孔洞为300~500μm骨架完好的三维石墨烯,并采用晶种诱导法在三维石墨烯表面原位生长直径为100nm左右、长度达2.80μm的ZnO纳米棒,从而制备出高度结晶的三维石墨烯/氧化锌纳米结构的复合材料。复合材料用XRD、SEM进行表征,并通过循环伏安曲线(CV曲线)及时间电流曲线(I-t曲线)电化学测试方法,测试三维石墨烯/氧化锌纳米结构复合材料对双氧水的检测情况。结果显示,采用新方法制备的三维石墨烯/氧化锌纳米结构复合材料作为电极对双氧水表现出优异的检测性能,检测限为1μmol/L,且线性检测范围为10~120μmol/L。更多还原

【Abstract】 Three-dimensional(3D)graphene foam has been synthesized by chemical vapor deposition(CVD)method,and well-aligned ZnO nanorod arrays were prepared on the surface of graphene foam by seed-mediated hydrothermal growth in aqueous solution.The size distribution was uniform,the ZnO nanorods are about100 nm in diameters and 2.80μm in length,and the results showed that the ZnO/graphene foam composite has high crystallinity.The products were characterized with XRD,SEM,and its electrochemical performances of detection for hydrogen peroxide(H2O2)were studied by cyclic voltammetry,and amperometric response measurements.It was found that the graphene/ZnO exhibits high sensitivity for detection of hydrogen peroxide with the extrapolated lower detection limits of 1.0μmol/L,linear detection range from 10 to 120μmol/L(R2=0.99501).更多还原