氮修飾石墨氈用于微生物燃料電池陽(yáng)極材料的研究
發(fā)布時(shí)間：2018-09-04 11:16
【摘要】：微生物燃料電池(MFC)作為近幾年來(lái)發(fā)展起來(lái)的新可再生能源裝置,具有條件溫和、環(huán)境友好和在有效回收能源的同時(shí)可實(shí)現(xiàn)廢水處理等優(yōu)點(diǎn),有望解決由于全球化石能源短缺以及化石能源在使用和開采中對(duì)環(huán)境的危害等問(wèn)題,成為本世紀(jì)能源和環(huán)境領(lǐng)域的研究熱點(diǎn)。 微生物燃料電池利用微生物作為催化劑,氧化有機(jī)物質(zhì),直接將化學(xué)能轉(zhuǎn)化為電能。影響MFC輸出功率的最大限制因素是電子的轉(zhuǎn)移過(guò)程。從MFC的結(jié)構(gòu)來(lái)看,陽(yáng)極作為電子轉(zhuǎn)移的載體,對(duì)陽(yáng)極的研究顯得很重要,本文采用三種不同類型的含氮化合物修飾石墨氈作為微生物燃料電池的陽(yáng)極,研究改性陽(yáng)極材料對(duì)MFC產(chǎn)電性能的影響,并根據(jù)等溫吸附法(BET)、掃描電子顯微鏡(SEM)、光電子能譜(XPS)等分析方法來(lái)進(jìn)一步探索了氮修飾陽(yáng)極對(duì)MFC的產(chǎn)電性能產(chǎn)生影響的原因。 首先使用過(guò)硫酸銨通過(guò)浸漬和電化學(xué)氧化法修飾石墨氈作為陽(yáng)極材料。實(shí)驗(yàn)結(jié)果表明：沒(méi)有修飾過(guò)的石墨氈(GF)電壓為0.5-0.52V,最大功率密度為283mW/m2；而浸漬法修飾的石墨氈(GF-A)和電化學(xué)氧化法修飾的石墨氈(GF-A1)所獲得的最大輸出功率密度分別為510mW/m2和609mW/m2,經(jīng)過(guò)XPS的分析表明,MFCs輸出功率隨著陽(yáng)極表面N/C比增加而增加。 然后采用經(jīng)過(guò)乙二胺和甘氨酸修飾過(guò)后的石墨氈作為陽(yáng)極材料。實(shí)驗(yàn)結(jié)果表明：獲得的最大輸出功率為355mW/m2和500mW/m2,分別比GF增加了25%和77%。SEM圖分析表明經(jīng)過(guò)修飾過(guò)后的石墨氈吸附的微生物比較多,主要是由于經(jīng)過(guò)乙二胺和甘氨酸修飾過(guò)后的石墨氈表面變得更粗糙,比表面積比較大,從而更多的細(xì)菌吸附在電極上,使得電子能夠更容易的從微生物傳遞到陽(yáng)極上。 最后采用聚苯胺和聚氮氮二甲基苯胺修飾石墨氈作為陽(yáng)極材料。實(shí)驗(yàn)結(jié)果表明：獲得的最大輸出功率密度分別為366mW/m2和333mW/m2。聚苯胺上N的孤對(duì)電子成為共軛主鏈的一部分,與醌式結(jié)構(gòu)單元的N結(jié)合,形成了具有電荷傳輸作用的極化孤子,因此增加了電極的導(dǎo)電性。通過(guò)SEM和其他電化學(xué)測(cè)量手段,觀察了材料表面的形態(tài)并進(jìn)一步證明電池性能的改變。陽(yáng)極表面積從未修飾的50.24m2/g增加到96.12m2/g和83.15m2/g,同時(shí)內(nèi)阻也降低。增加的表面積和減少的內(nèi)阻都可能是MFCs產(chǎn)電性能提高的重要原因,導(dǎo)電聚合物能夠幫助陽(yáng)極材料提高導(dǎo)電性和生物兼容性,從而提高M(jìn)FC的輸出功率。
[Abstract]:As a new renewable energy device developed in recent years, microbial fuel cell (MFC) has the advantages of mild conditions, friendly environment and efficient energy recovery and wastewater treatment. Due to the shortage of fossil energy in the world and the harm to the environment caused by the use and exploitation of fossil energy, it is expected to become a research hotspot in the field of energy and environment in this century. Microbial fuel cell uses microorganism as catalyst to oxidize organic matter and directly convert chemical energy into electric energy. The most limiting factor affecting the output power of MFC is the electron transfer process. From the point of view of the structure of MFC, it is very important to study the anode as the carrier of electron transfer. In this paper, three kinds of nitrogen-containing compounds modified graphite felt are used as the anode of microbial fuel cell. The effect of modified anode materials on the electrical properties of MFC was studied. The influence of nitrogen modified anode on the electrical properties of MFC was further explored by means of isothermal adsorption (BET), scanning electron microscope (BET),) (SEM), photoelectron spectroscopy (SEM),) and so on. First, ammonium persulfate was used as anode material to modify graphite felt by impregnation and electrochemical oxidation. The experimental results show that the (GF) voltage of unmodified graphite felt is 0.5-0.52V and the maximum power density is 283mW / m2; The maximum output power densities obtained by impregnation modified graphite felt (GF-A) and electrochemical oxidation modified graphite felt (GF-A1) are 510mW/m2 and 609mW / m2, respectively. The results of XPS analysis show that the output power increases with the increase of N / C ratio on the anode surface. Then graphite felt modified by ethylenediamine and glycine was used as anode material. The experimental results show that the maximum output power is 355mW/m2 and 500MW / m2, which is 25% higher than that of GF, respectively. The results of 77%.SEM diagram show that the modified graphite felt adsorbs more microorganisms than the modified graphite felt. The main reason is that the surface of graphite felt modified by ethylenediamine and glycine becomes rougher and the specific surface area is larger, so that more bacteria are adsorbed on the electrode, so that the electron can be transferred from microorganism to anode more easily. Finally, Polyaniline and polyazo-dimethylaniline were used as anode materials. The experimental results show that the maximum output power density obtained is 366mW/m2 and 333mW / m2, respectively. The solitary-pair electrons of N on Polyaniline form part of the conjugate main chain and combine with the N of the quinone structure unit to form a polarimetric soliton with charge transport effect which increases the conductivity of the electrode. The morphology of the material surface was observed by SEM and other electrochemical measurements. The surface area of the anode has never been modified to increase to 96.12m2/g and 83.15 m2 / g, while the internal resistance is also reduced. The increase of surface area and the decrease of internal resistance may be the important reasons for the improvement of the electrical properties of MFCs. Conductive polymers can help anode materials to improve their electrical conductivity and biological compatibility and thus increase the output power of MFC.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM911.4
本文編號(hào)：2221922
[Abstract]:As a new renewable energy device developed in recent years, microbial fuel cell (MFC) has the advantages of mild conditions, friendly environment and efficient energy recovery and wastewater treatment. Due to the shortage of fossil energy in the world and the harm to the environment caused by the use and exploitation of fossil energy, it is expected to become a research hotspot in the field of energy and environment in this century. Microbial fuel cell uses microorganism as catalyst to oxidize organic matter and directly convert chemical energy into electric energy. The most limiting factor affecting the output power of MFC is the electron transfer process. From the point of view of the structure of MFC, it is very important to study the anode as the carrier of electron transfer. In this paper, three kinds of nitrogen-containing compounds modified graphite felt are used as the anode of microbial fuel cell. The effect of modified anode materials on the electrical properties of MFC was studied. The influence of nitrogen modified anode on the electrical properties of MFC was further explored by means of isothermal adsorption (BET), scanning electron microscope (BET),) (SEM), photoelectron spectroscopy (SEM),) and so on. First, ammonium persulfate was used as anode material to modify graphite felt by impregnation and electrochemical oxidation. The experimental results show that the (GF) voltage of unmodified graphite felt is 0.5-0.52V and the maximum power density is 283mW / m2; The maximum output power densities obtained by impregnation modified graphite felt (GF-A) and electrochemical oxidation modified graphite felt (GF-A1) are 510mW/m2 and 609mW / m2, respectively. The results of XPS analysis show that the output power increases with the increase of N / C ratio on the anode surface. Then graphite felt modified by ethylenediamine and glycine was used as anode material. The experimental results show that the maximum output power is 355mW/m2 and 500MW / m2, which is 25% higher than that of GF, respectively. The results of 77%.SEM diagram show that the modified graphite felt adsorbs more microorganisms than the modified graphite felt. The main reason is that the surface of graphite felt modified by ethylenediamine and glycine becomes rougher and the specific surface area is larger, so that more bacteria are adsorbed on the electrode, so that the electron can be transferred from microorganism to anode more easily. Finally, Polyaniline and polyazo-dimethylaniline were used as anode materials. The experimental results show that the maximum output power density obtained is 366mW/m2 and 333mW / m2, respectively. The solitary-pair electrons of N on Polyaniline form part of the conjugate main chain and combine with the N of the quinone structure unit to form a polarimetric soliton with charge transport effect which increases the conductivity of the electrode. The morphology of the material surface was observed by SEM and other electrochemical measurements. The surface area of the anode has never been modified to increase to 96.12m2/g and 83.15 m2 / g, while the internal resistance is also reduced. The increase of surface area and the decrease of internal resistance may be the important reasons for the improvement of the electrical properties of MFCs. Conductive polymers can help anode materials to improve their electrical conductivity and biological compatibility and thus increase the output power of MFC.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM911.4
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 馮雅麗;李浩然;連靜;周良;;利用微生物電池研究微生物在礦物表面電子傳遞過(guò)程[J];北京科技大學(xué)學(xué)報(bào);2006年11期
2 朱雙美;趙元黎;韓道麗;李華洋;梁二軍;;吸附甘氨酸對(duì)多壁碳納米管電性能的影響[J];傳感器與微系統(tǒng);2007年04期
3 賈鴻飛,謝陽(yáng),王宇新;生物燃料電池[J];電池;2000年02期
4 曾麗珍;李偉善;;微生物燃料電池電極材料的研究進(jìn)展[J];電池工業(yè);2009年04期
5 康峰,伍艷輝,李佟茗;生物燃料電池研究進(jìn)展[J];電源技術(shù);2004年11期
6 李毅;胡翔;魏杰;王瑞林;;微生物燃料電池處理廢水時(shí)的產(chǎn)電性能研究[J];環(huán)境科學(xué)與技術(shù);2009年11期
7 李旭光,邢巍,楊輝,陸天虹;活性炭載體對(duì)聚合物電解質(zhì)膜燃料電池中炭載鉑電催化劑性能的影響[J];分析化學(xué);2002年07期
8 華麗;胡長(zhǎng)員;李鳳儀;;乙二胺功能化處理CNTs對(duì)NiB/CNTs催化劑性能的影響[J];分子催化;2006年03期
9 孫健;胡勇有;;廢水處理新理念——微生物燃料電池技術(shù)研究進(jìn)展[J];工業(yè)用水與廢水;2008年01期
10 駱海萍;劉廣立;張仁鐸;;以苯酚為燃料的微生物燃料電池產(chǎn)電特性[J];環(huán)境科學(xué)學(xué)報(bào);2008年07期
，本文編號(hào)：2221922
本文鏈接：http://sikaile.net/kejilunwen/dianlilw/2221922.html
最近更新
教材專著
