SCIENCE@home

One-step preparation of poly(glyoxal-bis(2-hydroxyanil))-amino-functionalized graphene quantum dots-MnO2 composite on electrode surface for simultaneous determination of vitamin B2 and dopamine

Jiajia Lu,Yanxia Kou,Xiangmei Jiang,Meijuan Wang,Y. Xue,Bowen Tian,Liang Tan

Published 2019 in Colloids and Surfaces A: Physicochemical and Engineering Aspects

ABSTRACT

Abstract As the sensing film on the electrode surface, some composites consisted of the conducting polymer and the different types of nanomaterials exhibit the improved electroconductivity and catalytic ability in comparison with those composed of the individual components. But their preparation generally requires a multi-step and relatively complicated process. Here a glassy carbon electrode (GCE) modified with poly(glyoxal-bis(2-hydroxyanil)) (PGBHA), amino-functionalized graphene quantum dots (afGQDs) and MnO2 nanoclusters (MnO2 NCs) was fabricated based on a one-pot protocol using the cyclic voltammetric scan. The scanning electron microscopy, infrared spectroscopy and X-ray photoelectron spectroscopy measurements confirmed the existence of the PGBHA-afGQDs film doped by MnO2 NCs on the GCE surface. The charge transfer on this chemically modified electrode could be well achieved, which was revealed by the cyclic voltammetry and electrochemical impedance spectroscopy. The prepared electrochemical sensor was employed for the simultaneous determination of vitamin B2 (VB2) and dopamine (DA) by using differential pulse voltammetry. The linear detection range of VB2 and DA was obtained from 0.1 to 100 μM under the optimized conditions and the detection limits were measured to be 0.04 μM and 0.05 μM, respectively.

PUBLICATION RECORD

CITATION MAP

EXTRACTION MAP

CLAIMS

  • No claims are published for this paper.

CONCEPTS

  • No concepts are published for this paper.

REFERENCES

Showing 1-52 of 52 references · Page 1 of 1

CITED BY

Showing 1-14 of 14 citing papers · Page 1 of 1