基于电流脉冲沉积法的硝酸根微传感器研究

基于微加工技术（Microfabrication technology）制备微传感电极并进行电化学表面修饰,研制出一种用于水体中NO3^-浓度检测的电化学微传感器。微传感器以两电极传感芯片为信号转换部件,使用电流脉冲沉积法在铂质工作电极表面制备微观形貌呈枝簇状的铜质敏感材料,利用铜质材料对酸性溶液中NO3^-的电催化还原特性,测量还原电流的大小,实现对NO3^-浓度的检测。采用扫描电子显微镜（SEM）和X射线衍射分析（XRD）技术对敏感膜进行表征和监测,探索高活性铜质敏感膜的制备方法;使用微传感器对硝酸盐标准样品进行检测,在低浓度范围（12.5～200μmol/L）,响应灵敏度为0.1422μ...

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Bibliographic Details
Published in分析化学 Vol. 43; no. 1; pp. 98 - 104
Main Author 李洋 孙楫舟 王晋芬 边超 佟建华 董汉鹏 张虹 夏善红
Format Journal Article
LanguageChinese
Published 中国科学院电子学研究所 传感技术国家重点实验室,北京,100190 2015
Subjects
湖库水样
电化学微传感器
电流脉冲沉积法
硝酸根离子检测
铜质敏感膜
电化学微传感器
铜质敏感膜
硝酸根离子检测
湖库水样
Copper sensitive material
Real water samples
电流脉冲沉积法
Micro electrochemical sensor
Nitrate determination
Pulsating current electrodeposition method
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ISSN0253-3820
DOI10.11895/j.issn.0253_3820.140563

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Summary:基于微加工技术（Microfabrication technology）制备微传感电极并进行电化学表面修饰,研制出一种用于水体中NO3^-浓度检测的电化学微传感器。微传感器以两电极传感芯片为信号转换部件,使用电流脉冲沉积法在铂质工作电极表面制备微观形貌呈枝簇状的铜质敏感材料,利用铜质材料对酸性溶液中NO3^-的电催化还原特性,测量还原电流的大小,实现对NO3^-浓度的检测。采用扫描电子显微镜（SEM）和X射线衍射分析（XRD）技术对敏感膜进行表征和监测,探索高活性铜质敏感膜的制备方法;使用微传感器对硝酸盐标准样品进行检测,在低浓度范围（12.5～200μmol/L）,响应灵敏度为0.1422μA/（μmol/L）;高浓度范围（200～3000μmol/L）,响应灵敏度为0.0984μA/（μmol/L）,均表现出较高的检测灵敏度;使用微传感器对北京等地的实际湖库水样进行检测,结果与专业水质检测机构采用紫外分光光度法的测试结果偏差在-3.9%～15.4%之间,两者具有一定的相关性,表明微传感器能够用于实际水样中NO3^-浓度的测量。
Bibliography:Micro electrochemical sensor; Copper sensitive material; Pulsating current electrodeposition method; Nitrate determination; Real water samples
Based on microfabrication technology and electrochemical modification method, a micro electrochemical sensor for nitrate（ NO3^-） determination was developed. A micro sensor chip with working electrode and counter electrode was used as the signal convertor of the sensor. The area of the micro workingelectrode was only 1 mm2. As an electrocatalysis sensitive material,copper was electrodeposited onto the working electrode by square-wave pulse current electrodeposition method. The morphologies and components of freshly deposited materials were examined by scanning electron microscopy（ SEM） and X-ray diffraction（ XRD） to explore key factors that affected the electrocatalytic ability of the deposited copper layer for reducing nitrate ions. The experimental results revealed that under the optimal conditions,the deposited copper layer was macroporous and had a larger effective
ISSN:0253-3820
DOI:10.11895/j.issn.0253_3820.140563