论文总字数：20825字

摘 要

目前制约各国经济快速增长的主要挑战为能源危机与环境问题，因此寻找新型环境友好可持续发展的能源获取方式成为研究热点。微生物燃料电池（Microbial fuel cell ，MFC）是20世纪90年代发展起来的一种新的能源获取方式，它可将污泥废料中有机物的化学能转为电能，具有很多优点，如来源广泛，清洁环保，条件适中等。这种既解决废物又能获得电能的技术为解决环境污染和能源危机提供了新的途径。目前，MFC的发展仍处于初级阶段，存在许多缺陷，其中输出功率低是限制其发展的关键因素。我们目前研究了产电微生物、阳极材料及电子中介体等来改善MFC性能。

本研究采用典型的双室MFC装置，采用电子介体核黄素修饰石墨纸电极，并考察其对MFC产电性能的影响，本论文研究成果总结如下：

石墨纸/核黄素（GP/RF）复合电极制备、表征及其在MFC中的应用研究。采用物理吸附的方法成功构建了GP/RF复合电极，结合HPLC、CV、FTIR表征结果显示：48 h后GP100核黄素吸附率达43%，出现了核黄素氧化还原峰和C=O、N-H基团，15天浸泡后核黄素氧化还原峰未发生明显变化，电极稳定性良好；分别以未经修饰的石墨纸电极与GP/RF作为MFC阳极进行比较，结果显示以GP/RF为电极的MFC输出电压有明显提高，最大输出功率提高了2.73倍（GP vs.GP100；40 vs.149 mW/m²）。

关键词: 微生物燃料电池 核黄素 电子中介体 复合电极

Enhancement of electrical properties of microbial fuel cells by riboflavin modified electrode

Abstract

At present, the main challenge that restricts the rapid economic growth of all countries is the energy crisis and environmental problems. Therefore, it has become a research hotspot to find a new type of environmentally friendly and sustainable energy acquisition method. It mainly uses microbial catalysis to convert the chemical energy of organic matter in wastewater sludge into electric energy, and has a wide range of raw materials. Mild operating conditions, clean and pollution-free advantages. This technology, which can not only deal with pollutants but also obtain electric energy, provides a new way to solve environmental pollution and energy crisis. At present, the development of MFC is still in the primary stage, and there are many defects, among which low output power is the key factor limiting its development. In order to improve the performance of MFC, our current research focuses on electrically producing microbes, anode materials and electronic intermediaries. In this paper, the effect of riboflavin modified electrode on the electrical properties of MFC was studied.

In this study, a typical two-chamber MFC apparatus was used. The anodic electrogen-producing strain was Shewanella oneidensis MR-1. The electronic riboflavin was used to modify the graphite paper electrode and its effect on the electrical properties of MFC was investigated. The research results in this paper are summarized as follows:

Preparation, characterization and Application of Graphite Paper / Riboflavin GPP / RF Composite electrode in MFC. The GP/RF composite electrode was successfully constructed by physical adsorption. The results of FTIR characterization showed that the adsorption rate of riboflavin reached 43% 48 h later, and the riboflavin redox peak and riboflavin redox peak did not change obviously after soaking for 15 days. The results showed that the output voltage of MFC with GP/RF as electrode was significantly increased, and the maximum output power was increased by 2.73 times by 40 vs.149 MW / m ~ (2 ) of GP vs.GP100m ~ (100). The results showed that the maximum output power of the electrode was 2.73 times higher than that of the modified graphite paper electrode, and the maximum output power of the electrode was 2.73 times higher than that of the MFC anode.

Key words: Microbial fuel cell; Riboflavin; Electronic intermediary; Composite electrode

目录

第一章 文 献 综 述 1

1.1研究背景 1

1.2 微生物燃料电池技术 1

1.2.1 微生物燃料电池的工作原理 1

1.2.2 产电微生物 2

1.3 电极材料 2

1.3.1 常用电极材料 2

1.3.2 核黄素 3

1.4 MFC在废水处理方面的发展 3

第二章 实验材料与方法 4

2.1实验材料 4

2.1.1仪器材料与试剂 4

2.1.2实验装置 7

2.2实验方法 7

2.2.1 分析方法 7

2.2.2菌种活化与保存 10

2.2.3电极制备与表征 10

2.2.4双室MFC的组装 11

2.2.5 双室MFC的运行与数据采集 12

第三章 结果与讨论 13

3.1石墨纸/核黄素（GP/RF）复合电极的制备 13

3.2复合电极性能表征 14

3.2.1 GP/RF的CV分析 14

3.2.2红外（FTIR）表征分析 15

3.2.3电极稳定性分析 15

3.3 GP/RF复合电极对MFC产电性能的影响 16

3.3.1MFC电压-时间曲线分析 16

3.3.2 MFC极化曲线和功率密度曲线的分析 17

3.3.3 MFC阳极电子传递机制分析 17

3.3.4 MFC阳极电镜（SEM）分析 18

3.4小结 19

第四章 结论与展望 21

4.1结论 21

4.2 展望 21

参考文献： 22

致谢 24

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