Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

In situ synthesis of gold nanoparticles on porous polyacrylonitrile nanofibers for sensing applications

Language

English

Abstract

A simple and cost-effective method was reported to synthesize small size (6 nm) gold nanoparticles (AuNPs) on polyacrylonitrile (PAN) electrospun nanofibers (AuNPs/PAN). The formation of AuNPs is attributed to the in situ reduction of Au(iii) to Au(0) by 4-(dimethylamino)benzaldehyde doped in the PAN nanofibers. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) confirmed that the AuNPs/PAN nanofibers showed good conductivity. The AuNPs/PAN nanofibers were used to immobilize tris(2,2′-bipyridyl) ruthenium(ii) ions (Ru(bpy)3 2+) to form an electrochemiluminescence (ECL) sensor. The AuNPs on the PAN nanofibers exhibited an excellent catalytic effect on the ECL of Ru(bpy)3 2+ which could be employed to detect low concentrations of phenolic compounds. The linear response range of the ECL sensor to hydroquinone is 0.55-37 μM with limit of detection of 80 nM (S/N = 3). This sensor has been successfully applied to determine the hydroquinone content in photographic developer samples. Our work provides a very simple and cost-effective method to synthesize AuNPs on polymer nanofibers which shows great potential in the field of electrocatalysis and chemo/biosensors. © 2011 The Royal Society of Chemistry.

Publication Date

2011

Source Publication Title

Analyst

Volume

136

Issue

21

Start Page

4545

End Page

4551

Publisher

Royal Society of Chemistry

DOI

10.1039/c1an15330g

Link to Publisher's Edition

http://dx.doi.org/10.1039/c1an15330g

ISSN (print)

00032654

ISSN (electronic)

13645528

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