Design and preparation of a non-enzymatic hydrogen peroxide sensor based on a novel rigid chain liquid crystalline polymer/reduced graphene oxide compositeElectronic supplementary information (ESI) available. See DOI: 10.1039/c5ra10540d

• Main Authors: Yang, Ya-Qi, Xie, He-Lou, Tang, Jun, Tang, Shuai, Yi, Jie, Zhang, Hai-Liang
• Format: Journal Article
• Language: English
• Published: 24.07.2015
• ISSN: 2046-2069
• DOI: 10.1039/c5ra10540d

A novel non-enzymatic hydrogen peroxide (H 2 O 2 ) sensor was developed using a rigid chain liquid crystalline (LC) polymer and reduced graphene oxide (rGO) composite. Firstly, we synthesized a novel rigid chain LC polymer with ferrocenyl as the side group. The chemical structures of the monomer and the corresponding polymer were confirmed by 1 H NMR, FTIR and 1 C NMR. LC behavior of the polymer was investigated by differential scanning calorimetry (DSC) and polarized light microscopy (POM). The electrochemical characterization of the PFECS/rGO films was performed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), typical amperometric response (IT) measurements. The ferrocenyl in polymer presented excellent electrochemical behavior, and the modified electrode exhibited preferable electrocatalytic activity to the reduction of H 2 O 2 . The work revealed that the developed electrochemical sensor detected H 2 O 2 with a higher sensitivity 117.142 μA mM −1 cm −2 and broader linear range between 1 × 10 −5 M to 1.9 × 10 −4 M. A novel non-enzymatic hydrogen peroxide (H 2 O 2 ) sensor was developed using a rigid chain liquid crystalline (LC) polymer with ferrocenyl as the side group and reduced graphene oxide (rGO) composite.