Disposable Carbon Dots Modified Screen Printed Carbon Electrode Electrochemical Sensor Strip for Selective Detection of Ferric IonsReportar como inadecuado




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Journal of Sensors - Volume 2017 2017, Article ID 7576345, 7 pages - https:-doi.org-10.1155-2017-7576345

Research ArticleDepartment of Chemistry, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia

Correspondence should be addressed to Suk Fun Chin

Received 25 November 2016; Accepted 16 January 2017; Published 2 February 2017

Academic Editor: Biplab Paul

Copyright © 2017 Shao Chien Tan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A disposable electrochemical sensor strip based on carbon nanodots C-Dots modified screen printed carbon electrode SPCE was fabricated for selective detection of ferric ions Fe

in aqueous solution. C-Dots of mean diameters within the range of 1–7 nm were synthesized electrochemically from spent battery carbon rods. The analytical performance of this electrochemical sensor strip was characterized using cyclic voltammetry CV and electrochemical impedance spectroscopy EIS. The deposition of C-Dots had enhanced the electron-transfer kinetics and current intensity of the SPCE remarkably by 734% as compared to that of unmodified SPCE. Under optimized conditions, the electrochemical sensor strip exhibited a linear detection range of 0.5 to 25.0 ppm Fe

with a limit of detection LOD of  ppm at ratio = 3. Validation of results by the electrochemical sensor strip was done by comparing analysis results obtained using an Atomic Absorption Spectrometer AAS.





Autor: Shao Chien Tan, Suk Fun Chin, and Suh Cem Pang

Fuente: https://www.hindawi.com/



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