期刊
POLYMERS
卷 10, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/polym10121329
关键词
reduced graphene oxide; Fe3O4; molecularly imprinted polymer; ionic liquid cross-linker; electrochemical sensor; diphenylamine
资金
- National Natural Science Foundation of China [21507041, 21677060]
- Zhejiang Provincial Natural Science Foundation of China [LY16B050007, LY18B050005]
- Open Project of MOE Key Laboratory for Analytical Science of Food Safety and Biology [FS18011]
- Program for Science and Technology of Zhejiang Province [2017C37029]
- Program for Science and Technology of Jiaxing [2018AY11002, 2017AY33034]
In this paper, we report a new composite of reduced graphene oxide/Fe3O4-ionic liquid based molecularly imprinted polymer (RGO/Fe3O4-IL-MIP) fabricated for diphenylamine (DPA) detection. RGO/Fe3O4-IL-MIP was prepared with RGO/Fe3O4 as supporter, ionic liquid 1-vinyl-3-butylimidazolium hexafluorophosphate ([VC(4)mim][PF6]) as functional monomer, ionic liquid 1,4-butanediyl-3,3'-bis-l-vinylimidazolium dihexafluorophosphate ([V2C4(mim)(2)][(PF6)(2)]) as cross-linker, and diphenylamine (DPA) as template molecule. Fourier transform infrared spectroscopy, thermal gravimetric analysis, scanning electron microscopy, and vibrating sample magnetometer were employed to characterize the RGO/Fe3O4-IL-MIP composite. RGO/Fe3O4-IL-MIP was then drop-cast onto a glassy carbon electrode to construct an electrochemical sensor for DPA. The differential pulse voltammetry (DPV) peak current response for 20 M DPA of RGO/Fe3O4-IL-MIP modified glassy carbon electrode (GCE) was 3.24 and 1.68 times that of RGO/Fe3O4-IL-NIP and RGO/Fe3O4-EGDMA-MIP modified GCEs, respectively, indicating the advantage of RGO/Fe3O4-IL-MIP based on ionic liquid (IL) as a cross-linker. The RGO/Fe3O4-IL-MIP sensor demonstrated good recognition for DPA. Under the optimized conditions, the RGO/Fe3O4-IL-MIP sensor exhibited a DPA detection limit of 0.05 M (S/N = 3) with a linear range of 0.1-30 M. Moreover, the new RGO/Fe3O4-IL-MIP based sensor detected DPA in real samples with satisfactory results.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据