硫掺杂石墨烯阴极在微生物燃料电池中的性能研究

doi:10.19965/j.cnki.iwt.2024-029

摘要/Abstract

摘要：

通过水热法将硫原子掺杂到石墨烯结构中，利用单室反应器装置搭建微生物燃料电池（MFC）。采用硫掺杂石墨烯（S-rGO）、活性炭（AC）和炭黑（CB）作为阴极催化剂，选用不同的比例进行混合。发现m（AC）∶m（CB）∶m（S-rGO）为1∶0.25∶0.075时，MFC反应器表现出最佳性能，最大输出电压为295 mV，功率密度为256 mW/cm²。此外，S-rGO的极限电流密度为3.46 mA/cm²，高于rGO（3.22 mA/cm²），表明S-rGO具有优异的电化学性能和稳定性。应对有机物冲击方面，S-rGO修饰的MFC能够提高污水的COD和TN的去除，相较于rGO，分别提升了2.5%和5.0%。因此，S-rGO是一种高效、稳定的MFC阴极催化剂，不仅能够提高MFC的电能转化效率，还能够提高MFC的污水处理能力，具有广阔的应用前景。

关键词: 硫掺杂石墨烯, 氧还原反应, 微生物燃料电池

Abstract:

Sulfur atoms were doped into the graphene structure by hydrothermal method, and a microbial fuel cell(MFC) was built by using a single-chamber reactor device. Sulfur-doped graphene(S-rGO), activated carbon(AC) and carbon black(CB) were used as cathode catalysts, and mixed with different proportions. It was found that when the mass ratio of AC∶CB∶S-rGO was 1∶0.25∶0.075, the MFC reactor showed the best performance. The peak output voltage was 295 mV, the power density was 256 mW/cm². In addition, the limiting current density of S-rGO was 3.46 mA/cm², which was higher than that of rGO with 3.22 mA/cm², indicating that S-rGO had excellent electrochemical performance and stability. In response to the impact of organic impact, the S-rGO catalyst could improve the removal rate of COD and TN of MFC by 2.5% and 5.0% higher than that of rGO, respectively. Therefore, S-rGO was an efficient and stable MFC cathode catalyst, which could not only improve the power conversion efficiency of MFC, but also improve the sewage treatment capacity of MFC, and had broad application prospects.

Key words: sulfur-doped graphene, oxygen reduction reaction, microbial fuel cell

中图分类号:

刘丽华, 许文锋, 贺琦, 蓝瑞嵩, 张倩, 陈博彦, 洪俊明. 硫掺杂石墨烯阴极在微生物燃料电池中的性能研究[J]. 工业水处理, 2025, 45(4): 133-138.

Lihua LIU, Wenfeng XU, Qi HE, Ruisong LAN, Qian ZHANG, Boyan CHEN, Junming HONG. The performance of sulfur-doped graphene cathode in microbial fuel cells[J]. Industrial Water Treatment, 2025, 45(4): 133-138.

https://www.iwt.cn/CN/Y2025/V45/I4/133

图/表 8

图1 S-rGO的SEM和TEM

Fig.1 Scanning electron microscope and transmission electron microscopy of S-rGO

图2 rGO和S-rGO的拉曼光谱图和红外光谱图

Fig.2 Raman spectra and infrared spectra of rGO and S-rGO

图3 S-rGO-1、S-rGO-2和rGO的CV曲线（a）和LSV曲线（b）

Fig.3 CV curves （a） and LSV curves（b） of S-rGO-1，S-rGO-2 and rGO

图4 S-rGO-1、S-rGO-2和rGO修饰的3种MFC反应器的功率密度曲线和极化曲线

Fig.4 The power density curves and polarization curves of the three MFC rectors modified with S-rGO-1，S-rGO-2 and rGO

图5 S-rGO-1、S-rGO-2和rGO修饰的3种MFC反应器的输出电压曲线

Fig.5 The output voltage curves of the three MFC rectors modified with S-rGO-1，S-rGO-2 and rGO

图6 S-rGO-1、S-rGO-2和rGO修饰的3种MFC反应器的COD去除率和TN去除率

Fig.6 COD and TN removal rates of the three MFC rectors modified with S-rGO-1，S-rGO-2 and rGO

表1 不同阴极修饰的MFC性能比较

Table 1 Comparison of MFC performance with different cathode modification

阴极	阳极	外阻/Ω	运行温度/℃	输出电压/V	COD去除率/%	参考文献
GO	碳刷	1 000		0.270	85.1	〔9〕
Cu₂O-rGO	碳刷		30	0.223	87.5	〔19〕
GO-Zn/Co	碳刷	1 000	30	0.150		〔21〕
CuS-ZnS@rGO	石墨刷	1 000	30	0.270		〔22〕
ZnS@rGO	石墨刷	1 000	30	0.200		〔22〕
Ni-CAT	碳刷	1 000		0.260	43.8	〔18〕
S-rGO-2	碳刷	1 000	30	0.295	92.6	本研究

图7 不同阴极生物膜的形成能力

Fig.7 The biofilm formation ability of different cathodes

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