| NiO-MWCNT修饰热解石墨电极的电化学行为研究 |
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| 引用本文： | 陈攀,戴高鹏,梁英,刘素芹.NiO-MWCNT修饰热解石墨电极的电化学行为研究[J].广州化工,2012,40(8):95-97. |
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| 作者姓名： | 陈攀 戴高鹏 梁英 刘素芹 |
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| 作者单位： | 湖北文理学院化学工程与食品科学学院,湖北襄阳,441053 |
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| 基金项目： | 湖北省教育厅科学技术重大项目 |
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| 摘 要： | 采用滴涂法将适量碳纳米管修饰到热解石墨电极上,后电沉积纳米氧化镍得到MWCNT/NiO/PG复合修饰电极。研究了它的电化学行为,并用于抗坏血酸的测定。试验表明,在pH=6的磷酸盐缓冲溶液中,抗坏血酸在修饰电极上产生一灵敏的氧化峰。当抗坏血酸的浓度在1.0×10-5～5.0×10-4 mol/L时,氧化峰电流与浓度呈线性关系,线性方程为:I(uA)=-0.4458-0.5922C(mmol/L),相关系数为R=-0.9989。检出限低至5.5×10-7 mol/L。该传感器重现性、稳定性、抗干扰性良好。
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| 关 键 词： | 热解石墨电极 纳米氧化镍 碳纳米管 抗坏血酸 |
Study on the Electrochemical Behavior of NiO -MWCNT Modified Pyrolysis Graphite Electrode |
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| CHEN Pan,DAI Gao-peng,LIANG Ying,LIU Su-qin.Study on the Electrochemical Behavior of NiO -MWCNT Modified Pyrolysis Graphite Electrode[J].GuangZhou Chemical Industry and Technology,2012,40(8):95-97. |
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| Authors: | CHEN Pan DAI Gao-peng LIANG Ying LIU Su-qin |
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| Affiliation: | CHEN Pan, DA1 Gao - peng, LIANG Ying, LIU Su - qin ( Department of Chemical Engineering and Food Science, Hubei University of Art and Science, Hubei Xiangyang 441053, China) |
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| Abstract: | A sensitive amperometric sensor based on NiO - MWCNT modified pyrolysis graphite electrode for determi- nation of ascorbie acid was fabricated. Cyclic vohammetry was applied to investigate the electrochemical properties of the modified electrode. The result of electrochemical experiments showed that such modified electrode had a favorable catalytic ability to ascorbic acid. Under the optimum conditions, the NiO - MWCNT/PE electrode exhibited a linear dependence on the concentration of ascorbic acid from1.0×10^-5 mol/L to 5.0×10^-4 mol/L, and a detection limit of 5.5 × 10^-7 mol/L （ signal/niose = 3 ）. Meanwhile, the modified electrode was also highly resistance towards typical inorganic salts and some biomolecules, and it had a high reproducibility and stability. |
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| Keywords: | pyrolysis graphite electrode nano oxidation nickel carbon nanotubes ascorbic acid |
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