本文選題：原位修飾　切入點：石墨烯　出處：《江蘇大學》2017年碩士論文　論文類型：學位論文

【摘要】：微生物燃料電池(Microbial fuel cells,MFCs)作為新型節(jié)能污水處理技術,能降解有機污染物并直接產(chǎn)生清潔電能,在污水處理、生物傳感器、生態(tài)修復等領域有巨大的應用潛力。但是,成本高和輸出功率低限制了MFCs實際應用。其主要瓶頸是電極材料成本高、制備方法復雜、電化學性能差。因此,開發(fā)制備方法簡單、性能優(yōu)異的新型電極成為推進MFCs實際應用的關鍵。復合碳電極是當前運用最為廣泛的電極材料之一,但是存在制備方法復雜、加工耗時長、細胞與電極間作用機制不明確等問題,需要進一步改進和深入研究。本研究采用原位修飾方法分別制備了石墨烯原位修飾(GO)和聚苯胺原位修飾(PANI)的石墨紙復合電極,并開發(fā)了一步在石墨紙表面原位同時修飾石墨烯和聚苯胺的新方法,制備獲得了石墨烯/聚苯胺修飾的復合石墨紙電極(GO/PANIOS)。本研究進一步對材料特性及其在MFCs中的產(chǎn)電性能進行了研究,并闡明了新型復合碳電極對MFCs產(chǎn)電性能的增強機制。研究結(jié)果總結(jié)如下:1)采用簡單的電化學方法(外加10V直流電壓)在石墨紙電極(GP)表面成功快速(4分鐘)剝離形成石墨烯層,制備獲得了GO電極。通過對MFCs性能比較發(fā)現(xiàn),以GO電極為陽極的MFCs的最大功率密度相比GP電極提高了4.1倍。進一步研究發(fā)現(xiàn),該原位修飾的石墨烯能提高電極的比表面積和潤濕性,強化MFCs中產(chǎn)電微生物和電極材料間的直接電子傳遞過程,進而增強MFCs產(chǎn)電性能。2)采用化學氧化法,對GP電極進行了聚苯胺的緩慢低溫原位聚合(12小時),制備了PANIchem電極;采用循環(huán)伏安法,以0.1 M硫酸和0.05 M苯胺混合液為電解液,利用三電極體系,在GP電極表面成功原位修飾了聚苯胺(20分鐘),制備了PANICV電極。通過對MFCs性能比較研究發(fā)現(xiàn),兩種方法修飾的聚苯胺均能增強MFCs產(chǎn)電性能。進一步對MFCs電化學行為進行研究發(fā)現(xiàn),該原位修飾的聚苯胺能提高電極的比表面積,并同步增強MFCs中產(chǎn)電微生物和電極間的直接和間接電子傳遞過程,進而增強MFCs產(chǎn)電性能。3)基于上述研究發(fā)現(xiàn)(原位修飾石墨烯和聚苯胺均能促進MFCs性能),本研究綜合改進了石墨烯原位制備和聚苯胺修飾方法,開發(fā)了一種一步、原位在石墨紙電極表面快速(4分鐘)修飾石墨烯/聚苯胺復合材料的新方法,成功在GP電極表面原位合成了石墨烯/聚苯胺復合材料,制備了GO/PANIOS電極。通過材料表征發(fā)現(xiàn),聚苯胺是以相互交錯的納米絲結(jié)構(gòu)附著于石墨烯上,并以部分氧化和導電狀態(tài)存在。對相應MFCs性能進行研究發(fā)現(xiàn),以GO/PANIOS電極為陽極MFCs的最大功率密度相比修飾前提高了22倍。進一步對MFCs電化學行為進行研究發(fā)現(xiàn),該原位修飾的石墨烯/聚苯胺復合材料能提高電極比表面積和潤濕性,并能協(xié)同促進MFCs中產(chǎn)電菌與電極間的直接和間接電子傳遞過程,進而增強MFCs的產(chǎn)電性能。
[Abstract]:Microbial fuel cells (MFCs), as a new energy-saving sewage treatment technology, can degrade organic pollutants and generate clean electricity directly. It has great application potential in sewage treatment, biosensor, ecological restoration and other fields. High cost and low output power limit the practical application of MFCs. The main bottleneck is the high cost of electrode materials, complex preparation methods and poor electrochemical performance. The new electrode with excellent performance has become the key to promote the practical application of MFCs. The composite carbon electrode is one of the most widely used electrode materials at present, but the preparation method is complex and the processing time is long. In this study, graphene in situ modification (GOG) and Polyaniline (pani) graphite paper composite electrodes were prepared by in situ modification. A new method was developed to modify graphene and Polyaniline simultaneously on the surface of graphite paper. A graphene / Polyaniline modified composite graphite paper electrode was prepared. The properties of the materials and their electrical properties in MFCs were studied. The enhancement mechanism of the new composite carbon electrode on the electrical properties of MFCs was described. The results were summarized as follows: 1) the graphene layer was formed by simple electrochemical method (adding 10V DC voltage) on the surface of the graphite paper electrode for 4 minutes. Go electrode was prepared, and the maximum power density of MFCs with go electrode as anode was 4.1 times higher than that of GP electrode by comparing the performance of MFCs with go electrode. It was found that the maximum power density of MFCs with go electrode as anode was 4.1 times higher than that of GP electrode. The in situ modified graphene can improve the specific surface area and wettability of the electrode, enhance the direct electron transfer process between the electroproducing microorganisms and the electrode materials in MFCs, and then enhance the electrical properties of MFCs. The PANIchem electrode was prepared by slow low temperature in situ polymerization of Polyaniline on GP electrode for 12 hours, and the three-electrode system was used by cyclic voltammetry with a mixture of 0. 1 M sulfuric acid and 0. 05 M aniline as electrolyte. The PANICV electrode was prepared by in situ modification of Polyaniline on the surface of GP electrode for 20 minutes. By comparing the properties of MFCs, it was found that both modified Polyaniline could enhance the electrical properties of MFCs. Furthermore, the electrochemical behavior of MFCs was studied. The in situ modification of Polyaniline can increase the specific surface area of the electrode and synchronously enhance the direct and indirect electron transfer process between the electroproducing microorganisms and the electrode in MFCs. Based on the findings above, both in situ modification of graphene and Polyaniline can promote the performance of MFCs. In this study, a new method of in situ preparation of graphene and modification of Polyaniline was developed by improving the method of in situ preparation of graphene and modification of Polyaniline. The graphene / Polyaniline composite was successfully synthesized on the surface of GP electrode by in situ modification of graphene / Polyaniline composite on the surface of graphite paper electrode for 4 minutes. The GO/PANIOS electrode was prepared. Polyaniline was attached to graphene with interlaced nanowires and existed in partial oxidation and conductive state. The properties of the corresponding MFCs were studied. The maximum power density of MFCs at GO/PANIOS electrode was 22 times higher than that before modification. The electrochemical behavior of MFCs was further studied. It was found that the in situ modified graphene / Polyaniline composite could improve the specific surface area and wettability of the electrode. It can promote the direct and indirect electron transfer process between the electroproducing bacteria and the electrode in MFCs, and then enhance the electrical properties of MFCs.
【學位授予單位】：江蘇大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O646.54;TM911.45

【參考文獻】

相關期刊論文 前10條

1 陳禧;朱能武;李小虎;;串聯(lián)微生物燃料電池的電壓反轉(zhuǎn)行為[J];環(huán)境科學與技術;2011年08期

2 馮穎;黃世華;康凱;段曉霞;;石墨烯片的制備與表征[J];新型炭材料;2011年01期

3 趙麗坤;閆蕾蕾;李景晨;呂瑩瑩;郝耀彤;;產(chǎn)電微生物與微生物燃料電池研究進展[J];安徽農(nóng)業(yè)科學;2010年26期

4 關榮鋒;王杏;;鹽酸摻雜制備導電性聚苯胺的工藝優(yōu)化研究[J];高分子通報;2009年12期

5 李瑜;鄭建龍;井新利;;化學氧化聚合制備微/納米結(jié)構(gòu)聚苯胺研究進展[J];化工新型材料;2009年11期

6 王鑫;馮玉杰;曲有鵬;李冬梅;李賀;任南琪;;溫度對啤酒廢水微生物燃料電池產(chǎn)電性能的影響[J];環(huán)境科學;2008年11期

7 趙磊;馮澤勝;張鈞;高海軍;;微生物燃料電池性能的影響因素研究[J];中國農(nóng)學通報;2008年11期

8 詹亞力;王琴;張佩佩;閆光緒;郭紹輝;;微生物燃料電池影響因素及作用機理探討[J];高等學�；瘜W學報;2008年01期

9 鄒勇進;孫立賢;徐芬;楊黎妮;;以新亞甲基藍為電子媒介體的大腸桿菌微生物燃料電池的研究[J];高等學�；瘜W學報;2007年03期

10 黃霞;范明志;梁鵬;曹效鑫;;微生物燃料電池陽極特性對產(chǎn)電性能的影響[J];中國給水排水;2007年03期

相關碩士學位論文 前3條

1 周揚;石墨烯聚苯胺修飾電極在雙室微生物燃料電池中的應用研究[D];長安大學;2015年

2 孔令迎;石墨烯和碳納米材料改性陽極在MFC中的應用[D];青島科技大學;2014年

3 李斯哲;基于石墨烯修飾電極的微生物燃料電池產(chǎn)電性能與機理[D];華南理工大學;2012年

，

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