Layer-by-layer assembled multilayer of graphene/Prussian blue toward simultaneous electrochemical and SPR detection of H2O2 |
| |
Authors: | Mao Yan Bao Yu Wang Wei Li Zhenggang Li Fenghua Niu Li |
| |
Institution: | a Engineering Laboratory for Modern Analytical Techniques, c/o State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, Jilin, PR China b Department of Chemistry and NanoDTU, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark |
| |
Abstract: | A new type of chemically converted graphene sheets, cationic polyelectrolyte-functionalized ionic liquid decorated graphene sheets (PFIL-GS) composite, was synthesized and characterized by Ultraviolet-visible (UV-vis) absorption, Fourier transform infrared, and Raman spectroscopy. It was found that the presence of PFIL enabled the formation of a very stable aqueous dispersion due to the electrostatic repulsion between PFIL modified graphene sheets. With respect to the excellent dispersibility of this material, we have fabricated a novel PFIL-GS/Prussian blue (PB) nanocomposite multilayer film via classic layer-by-layer (LBL) assembly. The assembly process was confirmed by UV-vis spectroscopy and surface plasmon resonance (SPR) spectroscopy, which showed linear responses to the numbers of the deposited PFIL-GS/PB bilayers. Moreover, the as-prepared composite films were used to detect hydrogen peroxide (H2O2) by electrochemical surface plasmon resonance (EC-SPR) spectroscopy. This real time EC-SPR technique can provide simultaneous monitoring of both optical SPR signal and electrochemical current responses upon injecting H2O2 into the reaction cell. The experimental results revealed that both the electrochemical and SPR signal exhibited splendid linear relationship to the concentration of the injected H2O2, and the detection limit could be up to 1 μM. |
| |
Keywords: | Graphene Prussian blue Ionic liquid Electrochemical-surface plasmon resonance Hydrogen peroxide |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|