微波法制备石墨烯及其金属复合材料

Synthesis of graphene and graphene/metal composites by microwave irradiation

采用改进的Hummers法制备氧化石墨(GO),通过微波辐射法(MWI),以绿色、无毒的聚乙二醇(PEG)为还原剂和稳定剂,原位制备石墨烯(RGO)及其金属纳米复合材料,实现了GO的控制还原及金属纳米粒子的均匀附着.利用紫外吸收光谱(UV-Vis)、傅里叶红外光谱(FT-IR)、透射电子显微镜(TEM)对所得材料进行分析表征,并通过循环伏安法(CV)对材料的电化学性能进行研究.结果表明:制得的RGO材料呈电子透明状,金属纳米粒子均匀分散在RGO片层上;而且复合材料对铁氰化钾的电催化活性很高,可以用于电化学传感器等电化学领域.

The graphite oxide （GO） is prepared using the modified Hummers＇ method and is crushed with the help of ultra- sonic wave. The colloidal form of graphene and graphene/metal composites is subsequently synthesised by situ re- duction through microwave irradiation using polyethylene glycol （PEG） as a Environmentally friendly, non- toxic reducing agent and stabilizer, while make the metal nanopartieles uniformly adhere to their surface. The samples are characterized by UV-Vis spectroscopy （UV-Vis）, Fourier transform infrared spectroscopy （FT-IR）, transmission electron microscopy （TEM） and their electrochemical properties are studied by means of cyclic vohammetry （CV） in addition. The results suggest that obtained RGO is e-transparent and metal nanoparticles are uniformly dispersed on the RGO layers. And the composites show high eleetrocatalytic activicty to ferricyanide and can be used as electrochemical sensors and other electrochemical fields.