导电聚合物/氧化石墨烯复合电极在生物电化学体系中的应用研究
关键词 聚苯胺 氧化石墨烯 石墨毡 微生物燃料电池
毕业论文设计说明书（论文）外文摘要
Title The application of conductive polymers/graphene oxide composites modified electrode in bioelectrochemical system
Abstract
In this paper, polyaniline/graphene oxide composite electrodes with high electrochemical activity were prepared. After oxidized to graphite oxide (GO) by Hummers method, graphene oxide (GEO) was obtained by ultrasonic treatment. PANI/GEO modified graphite felt (GF) electrodes were then fabricated using an electrochemical synthesis method. The electrodes were characterized by scanning electron microscopy (SEM) and Raman spectroscopy (RS). The electrochemical activity was investigated by cyclic voltammetry (CV). The current output of microbial fuel cell (MFC) was compared in terms of the anode materials, such as blank GF, PANI modified GF, and PANI/GEO modified GF anode. The results showed that improvement was the most significant for PANI/GEO modified GF anode in terms of the output performance of MFC. Because the PANI/GEO modified GF electrode has some advantages, such as simple production conditions and low cost, it is feasible for the replacement of conventional Pt catalyst in the MFC.
Keywords Polyaniline Graphene Oxide Graphite felt Microbial Fuel Cell
目录
1 前言 1
1.1 碳电极材料 1
1.2 过渡金属氧化物电极材料 2
1.3 导电聚合物电极材料 2
2 实验材料与方法 4
2.1 实验仪器与药品 4
2.2 实验方法 5
2.3 实验表征方法 9
3 结果与讨论 11
3.1 修饰电极的物理表征 11
3.2 MFC产电性能 14
结论 18
致谢 20
参考文献 21
1 前言
微生物燃料电池（Microbial Fuel Cell, MFC）是一种可有效降解有机物将其化学能直接转化为电能的特殊的生物装置，主要依靠作为阳极催化剂的产电微生物来进行能量的转化，在污水处理方面以及新能源领域具有相当广阔的应用前景。在生物电化学体系中，有机物在产电微生物的作用下分解，产生电子并传递到阳极，而该传递过程则是影响整个系统效率的速率限制步骤。
在MFC中，电子通常在微生物与阳极之间进行转移，阳极一般作为产电微生物的载体，它的材料性质对产电微生物的附着密度有很大影响，而产电微生物附着量的大小又是MFC产电性能好坏的关键性影响因素[1]。因此，一个完善的阳极需要确保发生上述电子转移过程的同时还能适应产电细菌的生长与附着。为此出现了各种以改善MFC阳极材料（包括金属和非金属等材料）性能为目的的研究[2]。在对电极材料研究开发的过程中，以下三类材料最引人瞩目：(1) 碳材料；(2) 金属氧化物；(3) 导电聚合物。下面分别予以叙述：