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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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基于碳载小尺寸银纳米颗粒的过氧化氢电化学传感器
DOI: 10.3724/SP.J.1096.2014.30818, PP. 689-694
Keywords: 碳载银纳米颗粒,无酶检测,电化学生物传感器,过氧化氢
Abstract:
以叶酸为碳源，采用水热法制备碳纳米盘，采用自还原法制备负载在碳纳米盘上的小尺寸银纳米颗粒。通过透射电子显微镜、X射线衍射实验、X射线光电子能谱对其形貌和晶面分布情况进行了表征。同时，将碳载小尺寸银纳米颗粒修饰到玻碳电极表面，构建了过氧化氢（H2O2）无酶电化学传感器。电化学循环伏安法（CV）和计时电流法（i-t）的研究结果表明，本传感器对H2O2的还原具有电催化活性，响应时间为1.8s，对H2O2的检出限为2.2μmol/L，线性范围为0.02~14mmol/L（R=0.997）。此传感器可以避免抗坏血酸、多巴胺、尿酸、葡萄糖对检测的干扰，长时间使用较为稳定，实际尿样检测结果令人满意。
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