Cyclic Voltammetric Determination of H2O2 with Poly-L-Lysine/Multi-wall Carbon Nanotubes Modified Glassy Carbon Electrode
摘 要
将多壁碳纳米管分散在N,N-二甲基甲酰胺中并滴涂在玻碳电极(GCE)表面,然后将该电极置于pH 6.7的0.01 mol·L-1 L-赖氨酸溶液中,于电位1.0~2.5 V范围内进行电聚合,制备了聚L-赖氨酸-多壁碳纳米管修饰电极(PLL/MWCNT′s/GCE)。采用循环伏安法对修饰电极的电化学性能进行了表征。研究发现,在pH 7.0的磷酸盐缓冲溶液中,该修饰电极对过氧化氢具有明显的电催化还原作用,据此提出了用循环伏安法测定过氧化氢的含量。过氧化氢的还原峰电流与其浓度在4.3×10-4~1.3×10-2mol·L-1之间呈线性关系,检出限(3S/N)为1.5×10-4mol·L-1。采用标准加入法进行回收试验,方法的回收率在92.4%~105%之间。
Abstract
Multi-wall nano-carbon tubes(MWCNT′s) was dispersed in DMF and dropped on the surface of glassy carbon electrode (GCE), which was polymerised electrochemically in 0.01 mol·L-1 L-lysine solution of pH 6.7 at the potential range of 1.0-2.5 V (vs.Ag/AgCl) to prepare poly-L-lysine/MWCNT′s modified electrode (abbr. as PLL/MWCNT′s/GCE). The electrochemical property of the modified electrode was studied by cyclic voltammetry. It was found that the modified electrode exhibited excellent electrocatalytic responses towards the reduction of H2O2. Based on this finding, a selective method for determination of H2O2 by cyclic voltammetry was proposed. Linear relationship between values of peak current and concentration of H2O2 was obtained in the range of 4.3×10-4-1.3×10-2mol·L-1, with detection limit of 1.5×10-4mol·L-1. Test for recovery was made by standard addition method, and values of recovery found were in the range of 92.4%-105%.
中图分类号 O657.14
所属栏目 工作简报
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收稿日期 2012/9/25
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备注屈建莹(1973-),女,河南南阳人,副教授,博士,主要从事电分析化学研究。
引用该论文: QU Jian-ying,ZHU Li-li,KANG Shi-ping,LOU Tong-fang,HUO Jia-jia. Cyclic Voltammetric Determination of H2O2 with Poly-L-Lysine/Multi-wall Carbon Nanotubes Modified Glassy Carbon Electrode[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2013, 49(10): 1166~1168
屈建莹,朱莉莉,康世平,娄童芳,霍佳佳. 聚L-赖氨酸-多壁碳纳米管修饰玻碳电极循环伏安法测定过氧化氢[J]. 理化检验-化学分册, 2013, 49(10): 1166~1168
被引情况:
【1】肖玲艳,黄姣,方敏,马明,李锦花,陈有为,陈丹超,俞雄飞, "氯化血红素催化-荧光光谱法测定染发剂中的过氧化氢",理化检验-化学分册 52, 275-277(2016)
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参考文献
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【11】王淑敏,李照山,屈建莹.多壁碳纳米管修饰玻碳电极伏安法测定氯霉素[J].化学研究, 2007,18(3):83-86.
【2】KULYS J, GORTON L, DOMIGUES E, et al. Electrochemical characterization of carbon pastes modified with proteins and polycations[J]. Electroanal Chem, 1994,372:49-55.
【3】KULYS J, WANG L Z, MAKSIMOVIENE A. L-Lactate oxidase electrode based on methlene green and carbon paste[J]. Anal Chim Acta, 1993,274(1):53-58.
【4】孙登明,马伟,张振新.聚L-赖氨酸修饰电极循环伏安法测定药剂中的多巴胺[J].分析化学, 2006,34(5):668-670.
【5】赵艳霞,马心英,王琦,等.聚L-赖氨酸修饰电极对去甲肾上腺素的电催化氧化[J].分析试验室, 2005,24(3):71-74.
【6】王秀文,余芬,赵志杰,等.对乙酰氨基酚在聚L-赖氨酸膜修饰电极上的电化学行为及测定[J].化学与生物工程, 2008,25(1):68-72.
【7】杨波,胡芳弟,魏金萍,等.黄芩素在聚L-赖氨酸修饰电极上的电化学研究[J].化学学报, 2009,67(22):2585-2591.
【8】王红娟,周春梅,余皓,等.多壁碳纳米管修饰玻碳电极用于过氧化氢的检测[J].电化学, 2007,13(1):72-76.
【9】HE Jian-bo, CHEN Chang-lun, LIU Jin-huai. Study of multi-wall carbon nanotubes self-assembled electrode and its application to the determination of carbon monoxide[J]. Sensors and Actuators B, 2004,99:1-5.
【10】ZHAO Yuan-di, ZHANG Wei-de, LUO Qing-ming, et al. The oxidation and reduction behavior of nitrite at carbon nanotube power microelectrodes[J]. Microchemical Journal, 2003,75:189-198.
【11】王淑敏,李照山,屈建莹.多壁碳纳米管修饰玻碳电极伏安法测定氯霉素[J].化学研究, 2007,18(3):83-86.
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