三维石墨烯的制备及其电化学应用-才分析化学专业毕业论文.docx

ABSTRACT Three—dimensional(3D)graphene with interconnected porous structures can show high specific surface area,excellent conductivity,low mass density,elegant flexibility and strong mechanical strengths，due to the combination of 3D porous structures and intrinsic properties of graphene，thus showing better functions than two—dimensional(2D)graphene sheets．The electrochemical properties of carbon materials Can be greatly improved by the introduction of heteroatoms into graphene materials．The development of a new method for the controllable and scalable production of heteroatom—doped 3D graphene materials is of great interest Heteroatom doping Call significantly increase active sites of carbon materials for oxygen reduction reaction (ORR)， which Call enhance ORR activity． Heteroatom—doped 3D graphene materials Can integrate the advantages of 3D graphene with heteroatom—doped carbons and thus are expected to serve as a highly active catalyst for ORR．The capacitance properties of carbon materials Can be greatly improved by the introduction of heteroatoms，because the involvement of heteroatoms in carbon materials Can not only improve the wettability of electrode materials in the electrolyte but also lead to great pseudocapacitance effect Heteroatom—doped 3D graphene materials can ensure large electrochemically active surface area,rapid ion transportation，and fast electron transport and thus are expected to be hi曲-performance electrode materials for supercapacitors．The unique structure and composition of heteroatom-doped 3D graphene materials is beneficial for the diffusion of analytes and electrolyte ions，SO heteroatom—doped 3D graphene materials are expected to be new electrode materials for highly sensitive electrochemical sensors．This thesis focuses on the preparation，characterizations and electrochemical applications of heteroatom—doped 3D graphene materials．The main contents are as follows： (1)Novel Co and N CO—doped graphene networks(Co N-GNWs)were facile