Publication detail

Improved Electrochemical Detection of Zinc Ions Using Electrode Modified with Electrochemically Reduced Graphene Oxide

KUDR, J. RICHTERA, L. NEJDL, L. XHAXHIU, K. VÍTEK, P. RUTTKAY-NEDECKÝ, B. HYNEK, D. KOPEL, P. ADAM, V. KIZEK, R.

Original Title

Improved Electrochemical Detection of Zinc Ions Using Electrode Modified with Electrochemically Reduced Graphene Oxide

Type

journal article in Web of Science

Language

English

Original Abstract

Increasing urbanization and industrialization lead to the release of metals into the biosphere, which has become a serious issue for public health. In this paper, the direct electrochemical reduction of zinc ions is studied using electrochemically reduced graphene oxide (ERGO) modified glassy carbon electrode (GCE). The graphene oxide (GO) was fabricated using modified Hummers method and was electrochemically reduced on the surface of GCE by performing cyclic voltammograms from 0 to -1.5 V. The modification was optimized and properties of electrodes were determined using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The determination of Zn(II) was performed using differential pulse voltammetry technique, platinum wire as a counter electrode, and Ag/AgCl/3 M KCl reference electrode. Compared to the bare GCE the modified GCE/ERGO shows three times better electrocatalytic activity towards zinc ions, with an increase of reduction current along with a negative shift of reduction potential. Using GCE/ERGO detection limit 5 ng.mL-1 was obtained.

Keywords

carbon; cyclic voltammetry; electrochemical impedance spectroscopy; electrochemistry; graphene oxide; heavy metal detection; reduced graphene oxide

Authors

KUDR, J.; RICHTERA, L.; NEJDL, L.; XHAXHIU, K.; VÍTEK, P.; RUTTKAY-NEDECKÝ, B.; HYNEK, D.; KOPEL, P.; ADAM, V.; KIZEK, R.

Released

1. 1. 2016

Publisher

MDPI

ISBN

1996-1944

Periodical

Materials

Year of study

9

Number

1

State

Swiss Confederation

Pages from

1

Pages to

12

Pages count

12

URL

http://www.mdpi.com/1996-1944/9/1/31

Full text in the Digital Library

http://hdl.handle.net/11012/63723

BibTex

@article{BUT128495,
  author="Jiří {Kudr} and Lukáš {Richtera} and Lukáš {Nejdl} and Kledi {Xhaxhiu} and Petr {Vítek} and Branislav {Ruttkay-Nedecký} and David {Hynek} and Pavel {Kopel} and Vojtěch {Adam} and René {Kizek}",
  title="Improved Electrochemical Detection of Zinc Ions Using Electrode Modified with Electrochemically Reduced Graphene Oxide",
  journal="Materials",
  year="2016",
  volume="9",
  number="1",
  pages="1--12",
  doi="10.3390/ma9010031",
  issn="1996-1944",
  url="http://www.mdpi.com/1996-1944/9/1/31"
}