金纳米粒子-石墨烯修饰玻碳电极的制备及对多巴胺、抗坏血酸和尿酸的同时检测

发布时间：2018-03-16 09:50

本文选题：金纳米粒子　切入点：石墨烯　出处：《分析科学学报》2015年03期 　论文类型：期刊论文

【摘要】：采用三步法制备了金纳米粒子-石墨烯层层组装的复合材料,并将其修饰在玻碳电极上,制备成一种新型的同时检测抗坏血酸(AA)、多巴胺(DA)和尿酸(UA)的电化学传感器。采用扫描电子显微镜(SEM)对复合材料进行了表征,并研究了传感器对AA、DA、UA电催化性能。结果表明:该传感器对AA、DA和UA的氧化具有很好的催化和分离效果,可实现AA、DA和UA的同时测定。在三者共存体系中,AA-DA、DA-UA、AA-UA的氧化峰电位差分别为152mV、161mV和313mV。线性范围分别为1.996×10-5~5.580×10-3、1.996×10-6~5.478×10-3和1.000×10-6~1.000×10-3 mol/L,检出限分别为1.200×10-5、1.030×10-7和4.100×10-7 mol/L。该修饰电极选择性好、稳定性高,有望用于实际样品中AA、DA和UA的同时检测。
[Abstract]:A composite composed of gold nanoparticles and graphene layers was prepared by three-step method and modified on glassy carbon electrode. A novel electrochemical sensor for simultaneous detection of ascorbic acid (AA), dopamine (DAA) and uric acid (UAA) was prepared. The composite was characterized by scanning electron microscopy (SEM). The electrocatalytic performance of the sensor for the oxidation of DA and UA was studied. The results show that the sensor has a good catalytic and separation effect on the oxidation of DA and UA. The potential difference of oxidation peak of AA-DA-DA-UAA-UA is 152mV 161mV and 313mV, respectively. The linear range is 1.996 脳 10-5, 5.580 脳 10-3n 1.996 脳 10-65.478 脳 10-65.478 脳 10-3 and 1.000 脳 10-61.000 脳 10-3 molL 路L ~ (-1), the detection limit is 1.200 脳 10-51.030 脳 10-7 and 4.100 脳 10-7 mol / L, respectively. The modified electrode has good selectivity and high stability, and the limit of detection is 1.200 脳 10-51.030 脳 10-7 and 4.100 脳 10-7 mol / L respectively, and the linear range is 1.996 脳 10-5, 5.580 脳 10-3, 1.996 脳 10-65.478 脳 10-65.478 脳 10-3 and 1.000 脳 10-6 脳 10-3 mol 路L ~ (-1), respectively. It is expected to be used for simultaneous detection of AADA and UA in actual samples.
【作者单位】：忻州师范学院化学系;
【基金】：山西省高等学校科技创新项目(No.20121023) 忻州师范学院大学生科技创新基金(院政字[2013]38号) 忻州师范学院化学化工创新实践基地项目
【分类号】：R943;O657.1

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