| 摘要: |
| 石墨相氮化碳纳米薄片（g-C3N4NSs）具有优良的电化学发光（ECL）性能和良好的成膜特性.以g-C3N4NSs作为ECL材料，利用其良好的成膜性能将其固定在玻碳电极（GCE）上，再以毒死蜱（CPF）作模板分子，甲基丙烯酸（MAA）作功能单体，通过分子自组装制备分子印迹聚合物（MIP）.将该聚合物引入g-C3N4NSs修饰电极，构建了一个MIP-ECL传感器.除去模板分子的传感器能够选择性识别CPF，利用CPF对g-C3N4NSs ECL信号的淬灭作用实现了CPF的高灵敏、高选择性检测.传感器对CPF的线性响应范围是1.0×10-8~1.0×10-4mol·L-1，检出限（LOD）是5.0 nmol·L-1，用于蔬菜中CPF残留量检测，结果令人满意. |
| 关键词: 电化学发光（ECL） 氮化碳纳米薄片（g-C3N4NSs） 分子印迹聚合物（MIP） 毒死蜱（CPF） |
| DOI：10.3969/J.ISSN.1000-5137.2021.06.006 |
| 分类号:O657.1 |
| 基金项目:上海师范大学“仪器分析”课程教学团队建设（304-AC9103-21-368011523） |
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| Molecularly imprinted polymer electrochemiluminescence sensor for sensitive and selective detection of chlorpyrifos |
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ZHANG Tianxin1, LIU Yiming2, YANG Minli1
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1.College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China;2.Kunshan City Huaqiao Xugongqiao Primary School, Kunshan 215332, Jiangsu, China
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| Abstract: |
| Graphite carbon nitride nanosheets (g-C3N4NSs) exhibite excellent electrochemiluminescence (ECL) performance and good film-forming properties. In this paper, g-C3N4NSs were used as an ECL material to be fixed on a glassy carbon electrode(GCE). A molecularly imprinted polymer (MIP) was prepared by molecular self-assembly with chlorpyrifos (CPF) as template molecule and methacrylic acid (MAA) as functional monomer. The polymer was then introduced into g-C3N4NSs modified electrode to construct a MIP-ECL sensor. After removing the template molecule, the sensor can specifically recognize CPF. Based on the specific recognition and quenching effect of CPF on the ECL signal of g-C3N4NSs, the high sensitive and selective detection of CPF was achieved. The sensor shows a linear response to CPF in range of 1.0×10-8-1.0×10-4 mol·L-1 and limit of detection (LOD) of 5.0 nmol·L-1. It was used to detect CPF residues in vegetables and the results were satisfactory. |
| Key words: electrochemiluminescence(ECL) carbon nitride nanosheets and the results were satisfactory(g-C3N4NSs) molecular imprinting polymer(MIP) chlorpyrifos(CPF) |
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