本文選題：還原氧化石墨烯 + 醌類(lèi)化合物　； 參考：《大連理工大學(xué)》2015年碩士論文

【摘要】：石墨烯是由單層碳原子構(gòu)成的新型二維碳納米材料,在電學(xué)、力學(xué)和熱學(xué)等方面具有優(yōu)異的性能,其制備方法和應(yīng)用成為當(dāng)今研究熱點(diǎn)。隨著其生產(chǎn)和使用量的不斷增加,石墨烯材料不可避免的通過(guò)各種途徑釋放到環(huán)境中,給生態(tài)環(huán)境帶來(lái)風(fēng)險(xiǎn)。近年來(lái),人們對(duì)于石墨烯材料在多孔介質(zhì)中的遷移及其對(duì)污染物的遷移歸趨的影響進(jìn)行了研究,但有關(guān)石墨烯材料與微生物相互作用的報(bào)道較少。本論文主要針對(duì)醌類(lèi)化合物對(duì)生物還原氧化石墨烯反應(yīng)活性的影響和石墨烯材料對(duì)生物轉(zhuǎn)化污染物的影響進(jìn)行研究�？疾燧祯�-2,6-二磺酸鈉(AQDS)、蔥醌-2-磺酸鈉(AQS)、蒽醌-2-羧酸(AQC)和5-羥基-1,4-萘醌(JQ)對(duì)Shewanella oneidensis MR-1還原氧化石墨烯(GO)的影響。實(shí)驗(yàn)結(jié)果表明,AQS. AQDS和JQ對(duì)S. oneidensis MR-1還原GO起到促進(jìn)作用,AQC反而起抑制作用,可能源于其對(duì)細(xì)菌的生物毒性。AQS介導(dǎo)生物制備的還原氧化石墨烯(Bio-rGO)具有過(guò)氧化物模擬酶的催化活性,可以催化H2O2對(duì)3,3’,5,5’-四甲基聯(lián)苯胺(TMB)的氧化反應(yīng),且酶反應(yīng)動(dòng)力學(xué)符合米門(mén)方程。推測(cè)Bio-rGO的催化機(jī)理為Bio-rGO促進(jìn)電子由TMB向H202傳遞,從而加速H202對(duì)TMB的氧化反應(yīng)。基于Bio-rGO的過(guò)氧化物模擬酶性質(zhì),建立了一種快速測(cè)定葡萄糖的比色檢測(cè)方法。該檢測(cè)方法的線(xiàn)性范圍為1～120μM,檢測(cè)限為1μM,具有良好的特異性�？疾爝�原氧化石墨烯(rGO)、氮摻雜還原氧化石墨烯(N-rGO)、負(fù)載金屬納米金還原氧化石墨烯(Au-rGO)和氨基-甲酰基咪唑修飾還原氧化石墨烯(imidazole-rGO)對(duì)S. oneidensis MR-1還原硝基苯的影響。實(shí)驗(yàn)結(jié)果表明,4種石墨烯材料均可以促進(jìn)S. oneidensis MR-1還原硝基苯,促進(jìn)效果由高到低的順序?yàn)镹-rGOrGOAu-rGO imidazole-rGO。通過(guò)對(duì)石墨烯材料的表征分析發(fā)現(xiàn),石墨烯材料的比表面積和電化學(xué)活性是影響其對(duì)生物還原硝基苯促進(jìn)效果的主要因素。
[Abstract]:Graphene is a new two-dimensional carbon nanomaterial composed of monolayer carbon atoms. It has excellent properties in electrical, mechanical and thermal fields. With the increasing of its production and usage, graphene materials are inevitably released into the environment through various ways, which brings risks to the ecological environment. In recent years, the migration of graphene materials in porous media and their effects on the migration and fate of pollutants have been studied, but there are few reports on the interaction between graphene materials and microorganisms. In this paper, the effects of quinones on the activity of bioreoxidized graphene and the effects of graphene materials on bioconversion pollutants were studied. The effects of sodium anthraquinone (AQDS), onion quinone sodium disulfonate (AQS), anthraquinone 2-carboxylic acid (AQC) and 5-hydroxy-1-anaphthoquinone (JQ) on the reduction of graphene oxide (go) in Shewanella oneidensis MR-1 were investigated. The experimental results show that the aqua. AQDS and JQ promote the reduction of go by S.AQC, which may be due to its biological toxicity to bacteria. The reductive graphene (Bio-rGO) mediated by AQS has the catalytic activity of peroxide-mimic enzyme. It can catalyze the oxidation of TMB by H _ 2O _ 2, and the kinetics of enzyme reaction accords with the equation of rice gate. The catalytic mechanism of Bio-rGO is that Bio-rGO promotes electron transport from TMB to H202, thus accelerates the oxidation of TMB by H202. Based on the properties of Bio-rGO peroxidase, a rapid colorimetric method for the determination of glucose was established. The linear range and detection limit of this method are 1 ~ 120 渭 m and 1 渭 m respectively. The effects of reduced graphene oxide (RGO), nitrogen-doped reductive graphene (N-rGO), supported nano-gold reductive graphene (Au-rGO) and imidazole-rgo (imidazole-rgo) on the reduction of nitrobenzene were investigated. The experimental results show that all four graphene materials can promote the reduction of nitrobenzene by S.oneidensis MR-1 in the order of N-rGOrGOAu-rgo imidazole-rgo. It is found that the specific surface area and electrochemical activity of graphene materials are the main factors that influence the promotion of bioreduction of nitrobenzene.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：X132

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

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本文編號(hào)：2102807