Construction of a novel highly electroactive nano-composite film modified with cellulose gum for the electrochemical recognition of tryptophan isomers

•A novel chiral carbon nanocomposite was fabricated by combining rGO-Fc and CMC.•The chiral electrochemical sensing system was constructed by functionalized graphene.•The limitation of CMC with poor enantioselectivity has been successfully broken by functionalized graphene.•The optimal condition has...

Full description

Saved in:
Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2021-10, Vol.898, p.115636, Article 115636
Main Authors: Du, Yongxin, Mo, Zunli, Shuai, Chao, Pei, Hebing, Wang, Jia, Chen, Ying, Yue, Ruimei, He, Simin
Format: Article
Language:English
Subjects:
Carbon
Carboxymethyl cellulose
Cellulose
Chemical sensors
Chiral carbon nanocomposite
Electroactivity
Electrochemical sensor
Enantiomers
Enantiorecognition
Fourier transforms
Graphene
Graphene oxide
Infrared spectroscopy
Isomers
Nanocomposites
Photoelectrons
Recognition
Sodium carboxymethyl cellulose
Tryptophan
X ray photoelectron spectroscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•A novel chiral carbon nanocomposite was fabricated by combining rGO-Fc and CMC.•The chiral electrochemical sensing system was constructed by functionalized graphene.•The limitation of CMC with poor enantioselectivity has been successfully broken by functionalized graphene.•The optimal condition has been tested. Ferrocene (Fc) was introduced into the layers of graphene oxide (GO) to form rGO-Fc with large surface area, high loading and high electroactivity. A chiral carbon nanocomposite rGO-Fc-CMC was synthesized via the adsorptional interaction between rGO-Fc and sodium carboxymethyl cellulose (CMC), and the successful synthesis of the chiral carbon nanocomposite (rGO-Fc-CMC) was showed by a series of characterization methods including scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS). The enantioselective interaction between chiral carbon nanocomposite (rGO-Fc-CMC) and tryptophan (Trp) enantiomers was detected by differential pulse voltammetry (DPV). The results demonstrated that the rGO-Fc-CMC/GCE showed a higher enantioselective capability for Trp than CMC/GCE, which can successfully break the limitation of a poor conductivity on CMC via the expansion of electrochemical signal. Therefore, designing an excellent-performance chiral carbon nanocomposite is of great significance in the construction of electrochemical sensors for chiral recognition.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2021.115636