【摘要】 首先采用Hummers法制备氧化石墨烯，然后通过热还原法将其还原为还原氧化石墨烯(rGO),将所制备的rGO分散在溶剂中并滴涂到玻碳电极表面来增加电极的导电性，最后以吡咯为功能单体，在多巴胺模板分子存在的情况下，通过电聚合法在rGO修饰的玻碳电极表面制备分子印迹聚合物层，得到基于分子印迹聚合物的多巴胺电化学传感器.采用XRD、TEM表征了rGO的结构和形貌，通过电化学方法研究了传感器的检测性能，优化了检测条件，结果表明，在最优的检测条件下，所制备的电化学传感器在较宽的检测范围(30～110 μM)内表现出较低的检测限(1.56 μM).同时，所制备的电化学传感器具有良好的选择性，并在7天内表现出较好的使用稳定性.更多还原

【Abstract】 Graphene oxide(GO) was first prepared by Hummers method, and reduced graphene oxide(rGO) was then obtained by reducing GO through thermal reduction method.Glassy carbon electrode was modified by dripping the suspension of as prepared rGO to improve its conductivity.Finally, molecularly imprinted polymer layer was prepared on the surface of the rGO modified glassy carbon electrode by electropolymerization using pyrrole as the functional monomer in the presence of dopamine and the electrochemical sensor for dopamine based on molecularly imprinted polymer was finally obtained.The structure and morphology of rGO were characterized by XRD and TEM.The obtained electrochemical sensor exhibited low detection limit(1.56 μM) within the detection range from 30 to 110 μM under optimized conditions towards dopamine.At the same time, the prepared electrochemical sensor has good selectivity and good stability even after 7 days.更多还原