Highly Sensitive and Selective Determination of Dopamine in the Presence of Ascorbic Acid Using Gold Nanoparticles‐Decorated MoS2 Nanosheets Modified Electrode
Highly Sensitive and Selective Determination of Dopamine in the Presence of Ascorbic Acid Using Gold Nanoparticles‐Decorated MoS2 Nanosheets Modified Electrode
复制标题
DOI：
10.1002/elan.201300332
复制
发表时间：
2013-11
期刊：
影响因子：
3
通讯作者：
Shao Su;Haofan Sun;Fei Xu;Lihui Yuwen;Lianhui Wang
中科院分区：
文献类型：
--
作者：
Shao Su;Haofan Sun;Fei Xu;Lihui Yuwen;Lianhui Wang
本文采用微波辅助水热法合成了一种由二硫化钼（MoS 2）纳米片和金纳米颗粒（AuNPs）组成的新型纳米复合材料，该材料具有MoS 2和AuNPs的特性。AuNPs@MoS2纳米复合修饰电极对多巴胺（DA）具有良好的电催化活性。其氧化峰电流与DA浓度在0.1 - 200 µM范围内呈线性关系，检测限为80 nM（S/N=3）。更重要的是，基于AuNPs@MoS2的传感器可以在大量过量的抗坏血酸存在下检测DA。AuNPs@MoS2基传感器显示出良好的灵敏度、重现性和选择性，表明AuNPs@MoS2纳米复合材料在电化学传感和其他电催化应用中是一个有前途的候选者。
Herein, a novel nanocomposite has been synthesized by molybdenum disulfide (MoS2) nanosheets and gold nanoparticles (AuNPs) via a microwave-assisted hydrothermal method, which possesses the specific features of both MoS2 and AuNPs. The AuNPs@MoS2 nanocomposite modified electrode exhibits excellent electrocatalytic activity toward dopamine (DA). Its oxidation peak current shows a linear dependence over the DA concentration in the range from 0.1 to 200 µM, with a detection limit of 80 nM (S/N=3). More importantly, the AuNPs@MoS2-based sensor can detect DA in the presence of a large excess of ascorbic acid. The AuNPs@MoS2-based sensor shows good sensitivity, reproducibility and selectivity, suggesting that the AuNPs@MoS2 nanocomposite is a promising candidate in electrochemical sensing and other electrocatalytic applications.