發(fā)布時(shí)間：2018-01-20 07:40

  本文關(guān)鍵詞： 聚3 4-乙烯二氧噻吩 碳糊電極 恒電位聚合 多巴胺　出處：《天津工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來(lái),導(dǎo)電聚合物在修飾電極、電化學(xué)和生物電化學(xué)傳感器領(lǐng)域獲得了廣泛的研究和應(yīng)用。目前,最為環(huán)保的導(dǎo)電類聚合物—聚3,4-乙烯二氧噻吩(PEDOT)由于分子結(jié)構(gòu)簡(jiǎn)單、導(dǎo)電率高、穩(wěn)定性好和能隙小等優(yōu)點(diǎn)在眾多導(dǎo)電聚合物中脫穎而出,成為上述研究領(lǐng)域的熱點(diǎn)之一。本文通過(guò)恒電位法將單體3,4-乙烯二氧噻吩(EDOT)沉積到碳糊電極表面,制備了 PEDOT修飾碳糊電極并采用紅外光譜、交流阻抗、循環(huán)伏安等方法對(duì)修飾電極進(jìn)行了表征。結(jié)果表明,PEDOT修飾碳糊電極具有較高的電導(dǎo)率、穩(wěn)定性以及電催化活性。實(shí)驗(yàn)中考察了多巴胺(DA)、尿酸(UA)和抗壞血酸(AA)在裸碳糊電極和PEDOT修飾碳糊電極上的電化學(xué)行為,結(jié)果表明,PEDOT修飾碳糊電極因其優(yōu)異的電催化活性,能夠有效區(qū)分DA、UA和AA的氧化峰,三者的氧化還原均涉及相同數(shù)量的質(zhì)子和電子轉(zhuǎn)移。在UA和AA同時(shí)存在的條件下,PEDOT修飾碳糊能夠有效的檢測(cè)DA的含量。實(shí)驗(yàn)分別使用了差分脈沖伏安法(DPV)和計(jì)時(shí)安培法對(duì)DA進(jìn)行了檢測(cè),得到了滿意的結(jié)果。在優(yōu)化條件下,利用DPV法對(duì)DA的線性檢測(cè)范圍是60μM～1500μM,檢測(cè)限是0.37μM;采用計(jì)時(shí)安培法對(duì)DA的檢測(cè)范圍是10 μM～1500 μM,檢測(cè)限為3.44 μM。PEDOT修飾碳糊電極具有易制備、抗干擾、良好的再現(xiàn)性和穩(wěn)定性。
[Abstract]:In recent years, conducting polymers have been widely studied and applied in the fields of modified electrodes, electrochemical and bioelectrochemical sensors. 4-ethylenedioxythiophene (PEDOT) has the advantages of simple molecular structure, high conductivity, good stability and small energy gap. It has become one of the hotspots in the above research field. In this paper, the monomers 3O4-ethylenedioxythiophene (EDOT) were deposited on the surface of carbon paste electrode by potentiostatic method. PEDOT modified carbon paste electrode was prepared and characterized by IR, AC impedance and cyclic voltammetry. PEDOT modified carbon paste electrode has high conductivity, stability and electrocatalytic activity. The electrochemical behavior of uric acid (UAA) and ascorbic acid (AA) on bare carbon paste electrode and PEDOT modified carbon paste electrode were studied. The results showed that the modified carbon paste electrode had excellent electrocatalytic activity. The oxidation peaks of DAHUA and AA can be distinguished effectively. The redox of the three involves the same number of protons and electron transfer, under the condition of the existence of UA and AA at the same time. PEDOT modified carbon paste can effectively detect the content of DA. The differential pulse voltammetry and chronoamperometric method were used to detect DA. Under the optimized conditions, the linear detection range of DA by DPV method is 60 渭 m ~ 1500 渭 M, and the detection limit is 0.37 渭 m. The detection range of DA by time-amperometric method is 10 渭 m ~ (-1) 渭 m ~ (-1) 渭 m, and the detection limit is 3.44 渭 M. PEDOT modified carbon paste electrode, which is easy to be prepared and anti-interference. Good reproducibility and stability.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O657.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 柳海萍;汪振輝;;多巴胺和腎上腺素在單壁碳納米管修飾電極上的電化學(xué)行為[J];當(dāng)代化工研究;2016年07期

2 李金芳;李兆祥;夏江濱;;聚(3,4-乙撐二氧噻吩)的制備及性能[J];陜西師范大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年06期

3 許艷霞;倪小英;梅廣;洪玲;;乙二胺四乙酸修飾碳糊電極測(cè)定鎘離子含量[J];糧食科技與經(jīng)濟(jì);2014年03期

4 蔣豐興;徐景坤;;高性能導(dǎo)電高分子PEDOT/PSS研究進(jìn)展[J];江西科技師范大學(xué)學(xué)報(bào);2013年06期

5 鄭若谷;陳亞勝;陳吉偉;陳仲;白燕;;EDTA修飾碳糊電極測(cè)定銅離子[J];暨南大學(xué)學(xué)報(bào)(自然科學(xué)與醫(yī)學(xué)版);2009年01期

6 韓曉霞;高作寧;;多巴胺在十二烷基苯磺酸鈉自組裝膜電極上的電化學(xué)行為和分析應(yīng)用[J];藥學(xué)學(xué)報(bào);2007年04期

7 易蘭花;王俊芬;黎拒難;高朋;;碳糊電極陽(yáng)極吸附伏安法測(cè)定諾氟沙星[J];理化檢驗(yàn)(化學(xué)分冊(cè));2007年01期

8 朱明芳,宋粉云,毋福海,曾勇勝,曾常青,黃慶華,廖月鏡;用混合粘合劑修飾的碳糊電極測(cè)定諾氟沙星[J];分析測(cè)試學(xué)報(bào);2003年04期

9 金根娣,胡效亞,冷宗周,姚成;奧美拉唑在碳糊電極上的吸附伏安測(cè)定法研究[J];分析測(cè)試學(xué)報(bào);2003年04期

10 萬(wàn)梅香,周維俠;聚苯胺膜的磁學(xué)性能[J];物理學(xué)報(bào);1992年02期

，

本文編號(hào)：1447405