氧化石墨烯-锰卟啉聚合物电催化硝基苯还原反应的研究
首发时间:2018-05-29
摘要:将锰卟啉与氧化石墨烯通过共价键结合的方式复合在一起,再通过共轭桥联剂偶联负载的锰卟啉,制备氧化石墨烯-卟啉聚合物的复合物(GMPP-AMP)。利用红外、拉曼光谱、扫描电镜以及透射电镜对其结构以及形貌进行表征。利用聚合金属卟啉能与硝基苯发生强烈相互作用和氧化石墨烯具有较大比表面的特性,制备修饰电极GMPP-AMP/GCE。通过循环伏安法考察其催化硝基苯还原的能力。结果表明GMPP-AMP/GCE比锰卟啉/GCE和氧化石墨烯/GCE具有更正的还原电位,并且还原电流响应更加明显,催化硝基苯还原的性能更好。通过差示脉冲伏安法表明了还原峰电流强度与硝基苯的浓度在0.04mM-0.24 mM范围内呈现出良好的线性关系。
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Study on Electrocatalytic Reduction of Nitrobenzene by Graphene Oxide-Manganese Porphyrin Polymer
Abstract:Manganese porphyrin and graphene oxide were combinined together by a covalent bond, and then the loaded manganese porphyrin coupled with conjugated bridging agentand the composite (GMPP-AMP) of the graphene oxide-porphyrin polymer was prepared. And The structure and morphology of the GMPP-AMP were characterized by FT-IR, Raman spectroscopy, SEM, TEM.The modified electrode GMPP-AMP/GCE was prepared due to the strong interaction between porphyrin and nitrobenzene and the large specific surface area of graphene oxide.The electrochemical activity of GMPP-AMP towards nitrobenzene reduction reaction was evaluated by cyclic voltammetry(CV).Compared to the graphene oxide and manganese porphyrin,an obvious positive shift of the peak potential and a larger current intensity were found with the GMPP-AMP modified electrode, suggesting GMPP-AMP can be a good catalyst for the nitrobenzene reduction reaction.Differential pulse voltammetry(DPV) showed a good linear relationship between reduction peak current intensity and the concentration of nitrobenzene in the range of 0.04 mM to 0.24 mM.
Keywords: Graphene oxide manganese porphyrin electrocatalytic reduction nitrobenzene
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氧化石墨烯-锰卟啉聚合物电催化硝基苯还原反应的研究
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