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Graphene-modified biochar anode on the electrical performance of MFC
Ferroelectrics ( IF 0.8 ) Pub Date : 2021-08-09 , DOI: 10.1080/00150193.2021.1902759
Shaojun Zhang 1 , Wei Tong 1 , Mingyu Wang 1
Affiliation  

Abstract

Improving the power output and other power generation performance is the technical bottleneck restricting the industrial application of microbial fuel cell (MFC). Modification of the anode using nanomaterials can significantly increase the power output of MFC. The negatively charged characteristics of Rhodopseudomonas palustris was utilized to propose electroplating of graphene on the surface of biochar, and preparation of polyaniline (PANI) modified biochar electrode by in situ polymerization. Thus, a graphene oxide/polyaniline modified biochar (GO/PANI@Biochar) anode was prepared. Thus, compared the effects of GO/PANI@Biochar, biochar, traditional carbon cloth (CC), and graphite felt (GF) anodes on the power generation performance of MFC. The results showed that the contact angle θ of the new anode was as low as 0°. The biocompatibility is good, and a large number of electricity-producing microorganisms adhere to the surface of the anode material. The maximum power density of GO/PANI@Biochar anode MFC reached to 2025 mW/m2, which was 72.12% higher than that of unmodified biochar, and it was 3.5, 4.39 times that of traditional GF and CC. The maximum output voltage was 6.12% higher than before modification, 15.56% and 23.8% higher than traditional GF and CC anodes. GO/PANI@Biochar anode utilized the advantages of GO conductivity and biochar high biocompatibility effectively. The synergism of them can significantly improve the current and power density of MFC.



中文翻译:

石墨烯改性生物炭阳极对 MFC 电性能的影响

摘要

提高功率输出等发电性能是制约微生物燃料电池(MFC)产业化应用的技术瓶颈。使用纳米材料对阳极进行改性可以显着提高 MFC 的功率输出。利用沼泽红假单胞菌的带负电特性,提出在生物炭表面电镀石墨烯,并通过原位聚合制备聚苯胺(PANI)改性生物炭电极。因此,制备了氧化石墨烯/聚苯胺改性的生物炭(GO/PANI@Biochar)阳极。因此,比较了GO/PANI@Biochar、biochar、传统碳布(CC)和石墨毡(GF)阳极对MFC发电性能的影响。结果表明,接触角θ新阳极的低至 0°。生物相容性好,大量产电微生物附着在负极材料表面。GO/PANI@Biochar阳极MFC的最大功率密度达到2025 mW/m 2,比未改性生物炭高72.12%,是传统GF和CC的3.5、4.39倍。最大输出电压比改造前提高了6.12%,比传统的GF和CC阳极提高了15.56%和23.8%。GO/PANI@Biochar 阳极有效地利用了 GO 导电性和 biochar 高生物相容性的优点。它们的协同作用可以显着提高MFC的电流和功率密度。

更新日期:2021-08-09
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