A novel electrochemical quercetin sensor based on Pd/MoS2-ionic liquid functionalized ordered mesoporous carbon

作者：Xu, Bingjie; Yang, Lite; Zhao, Faqiong; Zeng, Baizhao^*

来源：Electrochimica Acta, 2017, 247: 657-665.

DOI：10.1016/j.electacta.2017.06.130

• Ionic liquid
• Ordered mesoporous carbon
• MoS2
• Pd nanoparticles
• Quercetin

A quercetin (QR) sensor based on Pd/MoS2-ionic liquid functionalized ordered mesoporous carbon (Pd/ MoS2-IL-OMC) composite is developed. The Pd/MoS2-IL-OMC composite is prepared by using IL as anchor and OMC as substrate. MoS2 nanosheets are in situ grown on IL-OMC surface and then Pd nanoparticles are prepared on MoS2 nanosheets via chemical reduction method. As the nanocomposite combines the high conductivity of IL-OMC and the electrocatalytic activity of Pd nanoparticles and MoS2, the resulting sensor exhibits good performance towards QR, better than MoS2-IL-OMC and Pd/IL-OMC nanocomposites modified electrodes. The electrochemical sensor allows for the selective determination of QR, with a detection limit of 8.0 nM (S/N = 3), a linear range of 0.020 mu M-10 mu M, and a sensitivity of 150.1 mu A mu M (1) cm (2). It also shows good reproducibility and stability, and can be applied to the detection of QR in real samples.

• 出版日期2017-9-1
• 单位武汉大学