石墨烯-多壁碳纳米管复合材料协同刃天青修饰阳极对微生物燃料电池性能的影响

发布时间：2018-06-07 18:52

  本文选题：微生物燃料电池 + 阳极修饰　； 参考：《微生物学通报》2017年09期

【摘要】：【目的】利用石墨烯与多壁碳纳米管复合材料协同刃天青修饰微生物燃料电池(Microbial fuel cell,MFC)阳极,提高MFC的运行性能。【方法】以碳布为基底,采用滴涂法分别制备了刃天青/碳布(R/CC)、刃天青+石墨烯/碳布(R+GNS/CC)、刃天青+多壁碳纳米管/碳布(R+MWCNT/CC)、刃天青+石墨烯+多壁碳纳米管/碳布(R+GNS+MWCNT/CC)四种阳极材料。【结果】在降解高氯酸盐的过程中,与刃天青/碳布(最高输出电压54 m V)相比,刃天青+石墨烯/碳布、刃天青+多壁碳纳米管/碳布和刃天青+石墨烯+多壁碳纳米管/碳布阳极MFC最高输出电压分别为87、145、275 m V,分别提高了61.11%、168.52%、409.26%;高氯酸盐的还原速率也分别提高了59.1%、89.7%、147.3%。4种阳极的电化学交流阻抗(EIS)和塔菲尔(Tafel)测试发现,与刃天青/碳布阳极相比,刃天青+石墨烯/碳布、刃天青+多壁碳纳米管/碳布阳极活化内阻减小,电极反应速率提高,但刃天青+石墨烯+多壁碳纳米管/碳布阳极的活化内阻更小,电极反应速率更快,同时4种阳极附着微生物胞外聚合物(EPS)分析表明,修饰过的阳极附着微生物数量增加,多糖减少,R+GNS+MWCNT/CC阳极变化最大,更有利于微生物传递电子。【结论】石墨烯、多壁碳纳米管复合材料协同刃天青修饰MFC阳极可以减小活化内阻从而加快电子传递,进而提高MFC的性能。
[Abstract]:[objective] to improve the performance of microbial fuel cell by using graphene and multi-walled carbon nanotube composites to modify microbial fuel cell anode. [methods] carbon cloth was used as substrate. Four kinds of anode materials, such as azure / carbon cloth R / CCP, azurographene / carbon cloth R GNS / CCN, edge azure multiwall carbon nanotube / carbon cloth R MWCNT / CCP, edge azurographene multiwall carbon nanotube / carbon cloth MWCNT / CCC, respectively, were prepared by drop coating method. [results] in the degradation of perchlorates, Compared with the blade azure / carbon cloth (with a maximum output voltage of 54 MV), the blade azure graphene / carbon cloth, The maximum output voltage of MFC on edge azure multi-wall carbon nanotube / carbon cloth and edge azurographene multi-wall carbon nanotube / carbon cloth anode was 87145275 MV, respectively, which increased 61.1111% 168.52% and 409.26% respectively. The reduction rate of perchlorate was also increased by 59.1% ~ 89.7% and 89.7% ~ 3.4% respectively. Electrochemical impedance spectroscopy (EIS) and Tafel measurements found that Compared with the edge azure / carbon cloth anode, the activation internal resistance of the edge azure multi-walled carbon nanotube / carbon cloth anode was reduced, and the electrode reaction rate was increased. However, the activation resistance and electrode reaction rate of the anodes were smaller, and the EPSs analysis showed that the number of the modified anodes increased, but the activation resistance of the anodes was lower and the reaction rate of the electrodes was faster than that of the anodes, and the EPSs analysis showed that the number of the modified anodes was increased. Polysaccharide reduced R GNS MWCNT / CC anode changed greatly, which was more favorable for microbial electron transfer. [conclusion] Graphene, multi-walled carbon nanotube composite and edge azure modified MFC anode can reduce activation resistance and accelerate electron transfer. Then improve the performance of MFC.
【作者单位】： 天津城建大学;河北科技大学;
【基金】：国家自然科学基金项目(No.51678387) 天津市自然科学基金重点项目(No.17JCZDJC39300)~~
【分类号】：TM911.45
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本文编号：1992382