立方体银纳米-聚二烯二甲基氯化铵/氧化石墨烯复合膜修饰电极用于多巴胺和亚硝酸根的同时检测

以聚二烯二甲基氯化铵(PDDA)为保护剂和还原剂,制备了PDDA功能化的银纳米颗粒(Ag NPs),然后与氧化石墨烯(GO)复合,得到PDDA功能化的立方体银纳米(C-Ag NPs)/GO复合膜,修饰于玻碳电极(GCE)表面,形成C-Ag NPs-PDDA/GO/GCE。采用扫描电子显微镜表征了不同修饰膜的形貌,探讨了其对多巴胺(DA)和亚硝酸根(NO_2~-)的循环伏安行为,发现C-Ag NPs-PDDA/GO复合膜对DA和NO_2~-表现出显著的电催化氧化活性。采用差分脉冲伏安法,修饰电极检测DA的线性范围为0.030~0.300μmol/L和0.300~300μmol/L,检测NO!2的...

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Published in分析化学 Vol. 44; no. 10; pp. 1593 - 1599
Main Author 陈丹 曹忠 刘峰 吴玲 寻艳 何婧琳 肖忠良
Format Journal Article
LanguageChinese
Published 长沙理工大学 化学与生物工程学院,电力与交通材料保护湖南省重点实验室,长沙410114 2016
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Summary:以聚二烯二甲基氯化铵(PDDA)为保护剂和还原剂,制备了PDDA功能化的银纳米颗粒(Ag NPs),然后与氧化石墨烯(GO)复合,得到PDDA功能化的立方体银纳米(C-Ag NPs)/GO复合膜,修饰于玻碳电极(GCE)表面,形成C-Ag NPs-PDDA/GO/GCE。采用扫描电子显微镜表征了不同修饰膜的形貌,探讨了其对多巴胺(DA)和亚硝酸根(NO_2~-)的循环伏安行为,发现C-Ag NPs-PDDA/GO复合膜对DA和NO_2~-表现出显著的电催化氧化活性。采用差分脉冲伏安法,修饰电极检测DA的线性范围为0.030~0.300μmol/L和0.300~300μmol/L,检测NO!2的线性范围为30.0~2300μmol/L,检测下限分别为9.8 nmol/L和12.6μmol/L(S/N=3)。此电极具有良好的抗干扰性、重现性和稳定性,可用于人体血清样品中DA和NO_2~-的同时测定,回收率分别为97.4%~104.2%和98.0%~102.8%。与分光光度法比较,两者测定结果一致。
Bibliography:Poly( dienedimethylammonium chloride)( PDDA) functionalized silver nanoparticles( Ag NPs)prepared with PDDA as the protective and reductive agents was combined with graphene oxide( GO) to prepare PDDA functionalized cubic silver nanoparticles( C-Ag NPs) / GO composite,which was then modified on a glassy carbon electrode( GCE) to form C-Ag NPs-PDDA / GO / GCE. The surface morphologies of different modified electrodes were characterized by scanning electron microscope( SEM),and their corresponding cyclic voltammetric( CV) behaviors were investigated,indicating that the composite of C-Ag NPs-PDDA / GO exhibited excellent electrocatalytic oxidation activity to DA and NO_2~-. By using differential pulse voltammetry,the responses of C-Ag NPs-PDDA / GO / GCE were linear in the ranges of 0.030-0.300 μmol / L and 0.300-300μmol /L with detection limit of 9.8 nmol /L( S /N = 3) for DA,and 30.0-2300 μmol /L with detection limit of 12. 6 μmol / L( S / N = 3) for NO_2~-, respectively. The modified electrode displayed good
ISSN:0253-3820
DOI:10.11895/j.issn.0253-3820.160239