▎ 摘　　要

One kind of nanocomposite consisting of graphene and polypyrrole was synthesized via a facile and mild way with the assistant of microwave irradiation. The synthesis route was embedding the polypyrrole into the graphene flakes to form a 3D structure, to achieve larger active surface and higher electro-catalysis property. Structures and components of the composite were measured by X-ray diffraction, field emission scanning electron microscopy, and Fourier transform infrared spectroscopy. A stronger electrochemical response of electrode with modified resultant was observed in the electrochemical test. Dopamine sensor based on the composite showed a sensitivity of 363 mu A mM(-1) cm(-2), a linear range of 1 x 10(-4) M to 1 x 10(-3) M, and a detection limit of 2.3 x 10(-6) M (S/N=3). (c) 2017 Wiley Periodicals, Inc.