当前位置：
X-MOL 学术
›
Anal. Methods
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
An electrochemical sensor for dopamine based on polydopamine modified reduced graphene oxide anchored with tin dioxide and gold nanoparticles
Analytical Methods ( IF 2.7 ) Pub Date : 2017-08-11 00:00:00 , DOI: 10.1039/c7ay00991g Xiaoqing Cui 1, 2, 3, 4 , Xian Fang 1, 2, 3, 4 , Hong Zhao 1, 2, 3, 4 , Zengxi Li 1, 2, 3, 4 , Hongxuan Ren 4, 5, 6
Analytical Methods ( IF 2.7 ) Pub Date : 2017-08-11 00:00:00 , DOI: 10.1039/c7ay00991g Xiaoqing Cui 1, 2, 3, 4 , Xian Fang 1, 2, 3, 4 , Hong Zhao 1, 2, 3, 4 , Zengxi Li 1, 2, 3, 4 , Hongxuan Ren 4, 5, 6
Affiliation
|
In the present work, polydopamine (PDA) modified reduced graphene oxide (pRGO)/SnO2/Au nanoparticles (NPs) were synthesized. SnO2/AuNPs were prepared through the redox reaction between reductive stannous(II) ions and oxidative auric(III) ions without any other reagents, and then the as-prepared graphene oxide (GO) was reduced and stabilized with the help of DA followed by decorating with SnO2/AuNPs. The morphology and structure of the hybrid nanomaterials were characterized by Raman spectroscopy, scanning electron microscopy (SEM) and X-ray diffraction analysis. Then we constructed electrochemical sensors based on the hybrid nanomaterials for the determination of dopamine (DA). Cyclic voltammetry (CV) results showed that the hybrid nanomaterials had better sensing performance than pRGO/AuNPs and pRGO. Differential pulse voltammetry (DPV) showed that the separation of oxidation peak potentials for ascorbic acid (AA)–DA, uric acid (UA)–DA and UA–AA was about 200 mV, 100 mV and 300 mV, respectively. The linear range for the detection of DA was from 0.008 μM to 20 μM with a coefficient of 0.9986. The detection limit was 5 nM (S/N = 3). These indicate the selective and sensitive detection of DA. Finally, the constructed sensors were also applied to detect DA in human real samples.
中文翻译：
基于聚多巴胺修饰的还原氧化石墨烯与二氧化锡和金纳米粒子锚定的多巴胺电化学传感器
在本工作中，合成了聚多巴胺（PDA）改性的还原氧化石墨烯（pRGO）/ SnO 2 / Au纳米颗粒（NPs）。的SnO 2 /金纳米粒子是通过之间的还原亚锡（氧化还原反应来制备II）离子和氧化的金（III），不含任何其它试剂，然后将所制备的石墨烯氧化物（GO）还原，并用DA的帮助下稳定的离子，随后通过用SnO 2装饰/ AuNPs。通过拉曼光谱，扫描电子显微镜（SEM）和X射线衍射分析对杂化纳米材料的形貌和结构进行了表征。然后，我们基于杂化纳米材料构建了用于测定多巴胺（DA）的电化学传感器。循环伏安法（CV）结果表明，杂化纳米材料比pRGO / AuNPs和pRGO具有更好的感测性能。差示脉冲伏安法（DPV）显示，抗坏血酸（AA）–DA，尿酸（UA）–DA和UA–AA的氧化峰电位分别约为200 mV，100 mV和300 mV。DA检测的线性范围为0.008μM至20μM，系数为0.9986。检出限为5 nM（S / N = 3）。这些表明对DA的选择性和灵敏检测。最后，
更新日期：2017-09-21
中文翻译：
基于聚多巴胺修饰的还原氧化石墨烯与二氧化锡和金纳米粒子锚定的多巴胺电化学传感器
在本工作中，合成了聚多巴胺（PDA）改性的还原氧化石墨烯（pRGO）/ SnO 2 / Au纳米颗粒（NPs）。的SnO 2 /金纳米粒子是通过之间的还原亚锡（氧化还原反应来制备II）离子和氧化的金（III），不含任何其它试剂，然后将所制备的石墨烯氧化物（GO）还原，并用DA的帮助下稳定的离子，随后通过用SnO 2装饰/ AuNPs。通过拉曼光谱，扫描电子显微镜（SEM）和X射线衍射分析对杂化纳米材料的形貌和结构进行了表征。然后，我们基于杂化纳米材料构建了用于测定多巴胺（DA）的电化学传感器。循环伏安法（CV）结果表明，杂化纳米材料比pRGO / AuNPs和pRGO具有更好的感测性能。差示脉冲伏安法（DPV）显示，抗坏血酸（AA）–DA，尿酸（UA）–DA和UA–AA的氧化峰电位分别约为200 mV，100 mV和300 mV。DA检测的线性范围为0.008μM至20μM，系数为0.9986。检出限为5 nM（S / N = 3）。这些表明对DA的选择性和灵敏检测。最后，
京公网安备 11010802027423号