| nano-TiO2修饰金电极对NO2-的电化学检测 |
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| 引用本文： | 王亚珍,陈飞,吴天奎. nano-TiO2修饰金电极对NO2-的电化学检测[J]. 江汉大学学报(自然科学版), 2005, 33(4): 26-28 |
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| 作者姓名： | 王亚珍 陈飞 吴天奎 |
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| 作者单位： | 江汉大学,化学与环境工程学院,湖北,武汉,430056;江汉大学,化学与环境工程学院,湖北,武汉,430056;江汉大学,化学与环境工程学院,湖北,武汉,430056 |
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| 基金项目： | 湖北省自然科学基金资助课题(2004ABA116) |
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| 摘 要： | 研制了一种纳米二氧化钛薄膜修饰的金电极(nano-TiO2/Au),用循环伏安法研究了亚硝酸根(NO2)在该电极上的电化学行为,并对实验条件进行了优化.实验结果表明,该电极在酸性介质中(0.1mol/LH2SO4)对NO2的氧化具有高度灵敏性和选择性,且大多数阳离子对NO2的测定无干扰.NO2的氧化峰电流与其浓度在2.0×108~4.0×104mol/L范围内呈良好的线形关系,检测限可达2.0×109mol/L.
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| 关 键 词： | 纳米二氧化钛 亚硝酸根 化学修饰电极 循环伏安法 电化学检测 |
| 文章编号： | 1673-0143（2005）04-0026-03 |
| 收稿时间： | 2005-07-05 |
| 修稿时间： | 2005-07-05 |
Electrochemical Determination of Nitrite at nano-TiO2 Film Modified Gold Electrode |
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| WANG Ya-zhen,CHEN Fei,WU Tian-kui. Electrochemical Determination of Nitrite at nano-TiO2 Film Modified Gold Electrode[J]. Journal of Jianghan University(Natural Sciences), 2005, 33(4): 26-28 |
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| Authors: | WANG Ya-zhen CHEN Fei WU Tian-kui |
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| Abstract: | A novel nano-TiO2film modified gold electrode was fabricated for determination of nitrite(NO2) in 0.1 mol/L H2SO4solution.The electrochemical behavior of NO2at this electrode has been studied.The experimental results indicated that this film electrode has good stability and high electrocatalytic activity toward the oxidation of nitrite in acidic aqueous solution.The modified electrode can be used for determination of nitrite in the concentration range of 2.0×108~ 4.0×104 mol/L with the correlation coefficient of 0.996,the detection limit is 2.0×109mol/L.The modified electrode preferentially accumulates nitrite from the solution,while most ions do not interfere with the determination. |
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| Keywords: | nano-TiO2 nitrite chemically modified electrode cyclic voltammetry elec-trochemical determination |
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