Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

CdS nanotubes thin film for electrochemiluminescence analysis of phenolic compounds

Language

English

Abstract

A CdS nanotubes (NT) thin film has been fabricated to determine phenolic compounds based on the electrochemiluminescence (ECL) quenching of the CdS NT. The CdS NT thin film coated on an indium tin oxide substrate exhibits strong ECL emission with potassium persulfate (K 2S 2O 8) as a coreactant. The effects of pH, electrolyte concentration and cyclic voltammetric scan rate on the ECL were studied. The quenching efficiency is governed by the position of the hydroxyl moiety in the parent benzene ring which follows the trend: resorcinol (1,3-benzenediol) > catechol (1,2-benzenediol) > hydroquinone (1,4-benzenediol) ≈ phenol. Under the optimal experimental conditions of 0.010 M K 2S 2O 8, pH 11.60 and 0.10 V s -1, the quenching of ECL by catechol (2.0-10.0 μM), hydroquinone (40.0-140 μM), phenol (10-60 μM) and resorcinol (2.0-12.0 μM) follows Stern-Volmer behaviour. The limits of detection are calculated as 0.058, 0.64, 1.7, and 0.069 μM (S/N = 3) for catechol, hydroquinone, phenol, and resorcinol respectively. The fabrication of the CdS NT film is reproducible and its shelf-life is longer than three months. The CdS NT film has been successfully applied to determine the phenol contents in various environmental water samples with satisfactory results and good recoveries. Our proposed ECL CdS NT film provides a simple and convenient method for the detection of phenolic compounds and shows potential use in the pharmaceutical industry and environmental monitoring. © 2012 The Royal Society of Chemistry.

Publication Date

2012

Source Publication Title

Analytical Methods

Volume

4

Issue

4

Start Page

1053

End Page

1059

Publisher

Royal Society of Chemistry

DOI

10.1039/C2AY05869C

Link to Publisher's Edition

http://dx.doi.org/10.1039/C2AY05869C

ISSN (print)

17599660

ISSN (electronic)

17599679

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