Poly(propyleneimine) dendrimer-gold nanoparticle modified exfoliated graphite electrode for the electrochemical detection of o-nitrophenol

Thabile Ndlovu; Omotayo A. Arotiba; Bhekie B. Mamba

Poly(propyleneimine) dendrimer-gold nanoparticle modified exfoliated graphite electrode for the electrochemical detection of o-nitrophenol

Thabile Ndlovu, Omotayo A. Arotiba, Bhekie B. Mamba

Chemical Sciences

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The electrochemical detection of o-nitrophenol (o-NP) on a poly(propyleneimine) dendrimer-gold nanocomposite modified exfoliated graphite electrode (EG) is presented. The nanocomposite was prepared by a single step electro-co-deposition method using cyclic voltammetry onto a lab fabricated EG electrode. The PPI-AuNP modified EG electrode exhibited an enhanced electro-activity for o-NP reduction over both EG electrode and nanocomposite modified glassy carbon electrode. Square wave voltammetric cathodic peak current of o-NP was proportional to the o-NP concentration between 3.1 x 10^-7mol L^-1 -5.0 x 10^-5mol L^-1, with a detection limit of 3.3 x 10^-8 mol L^-1. No interference was observed from other phenolic compounds except nitro containing compounds.

Original language	English
Pages (from-to)	8330-8339
Number of pages	10
Journal	International Journal of Electrochemical Science
Volume	9
Issue number	12
Publication status	Published - 2014

Keywords

Exfoliated graphite electrode
Gold nanoparticle
Nanocomposite
Poly(propyleneimine) dendrimer
o-Nitrophenol

ASJC Scopus subject areas

Electrochemistry

Cite this

@article{7bab64f58b4240c09f1bb01c4ed066eb,

title = "Poly(propyleneimine) dendrimer-gold nanoparticle modified exfoliated graphite electrode for the electrochemical detection of o-nitrophenol",

abstract = "The electrochemical detection of o-nitrophenol (o-NP) on a poly(propyleneimine) dendrimer-gold nanocomposite modified exfoliated graphite electrode (EG) is presented. The nanocomposite was prepared by a single step electro-co-deposition method using cyclic voltammetry onto a lab fabricated EG electrode. The PPI-AuNP modified EG electrode exhibited an enhanced electro-activity for o-NP reduction over both EG electrode and nanocomposite modified glassy carbon electrode. Square wave voltammetric cathodic peak current of o-NP was proportional to the o-NP concentration between 3.1 x 10-7mol L-1 -5.0 x 10-5mol L-1, with a detection limit of 3.3 x 10-8 mol L-1. No interference was observed from other phenolic compounds except nitro containing compounds.",

keywords = "Exfoliated graphite electrode, Gold nanoparticle, Nanocomposite, Poly(propyleneimine) dendrimer, o-Nitrophenol",

author = "Thabile Ndlovu and Arotiba, {Omotayo A.} and Mamba, {Bhekie B.}",

note = "Publisher Copyright: {\textcopyright} 2014 The Authors.",

year = "2014",

language = "English",

volume = "9",

pages = "8330--8339",

journal = "International Journal of Electrochemical Science",

issn = "1452-3981",

publisher = "Electrochemical Science Group",

number = "12",

}

TY - JOUR

T1 - Poly(propyleneimine) dendrimer-gold nanoparticle modified exfoliated graphite electrode for the electrochemical detection of o-nitrophenol

AU - Ndlovu, Thabile

AU - Arotiba, Omotayo A.

AU - Mamba, Bhekie B.

PY - 2014

Y1 - 2014

N2 - The electrochemical detection of o-nitrophenol (o-NP) on a poly(propyleneimine) dendrimer-gold nanocomposite modified exfoliated graphite electrode (EG) is presented. The nanocomposite was prepared by a single step electro-co-deposition method using cyclic voltammetry onto a lab fabricated EG electrode. The PPI-AuNP modified EG electrode exhibited an enhanced electro-activity for o-NP reduction over both EG electrode and nanocomposite modified glassy carbon electrode. Square wave voltammetric cathodic peak current of o-NP was proportional to the o-NP concentration between 3.1 x 10-7mol L-1 -5.0 x 10-5mol L-1, with a detection limit of 3.3 x 10-8 mol L-1. No interference was observed from other phenolic compounds except nitro containing compounds.

AB - The electrochemical detection of o-nitrophenol (o-NP) on a poly(propyleneimine) dendrimer-gold nanocomposite modified exfoliated graphite electrode (EG) is presented. The nanocomposite was prepared by a single step electro-co-deposition method using cyclic voltammetry onto a lab fabricated EG electrode. The PPI-AuNP modified EG electrode exhibited an enhanced electro-activity for o-NP reduction over both EG electrode and nanocomposite modified glassy carbon electrode. Square wave voltammetric cathodic peak current of o-NP was proportional to the o-NP concentration between 3.1 x 10-7mol L-1 -5.0 x 10-5mol L-1, with a detection limit of 3.3 x 10-8 mol L-1. No interference was observed from other phenolic compounds except nitro containing compounds.

KW - Exfoliated graphite electrode

KW - Gold nanoparticle

KW - Nanocomposite

KW - Poly(propyleneimine) dendrimer

KW - o-Nitrophenol

UR - http://www.scopus.com/inward/record.url?scp=84908676150&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84908676150

SN - 1452-3981

VL - 9

SP - 8330

EP - 8339

JO - International Journal of Electrochemical Science

JF - International Journal of Electrochemical Science

IS - 12

ER -

Poly(propyleneimine) dendrimer-gold nanoparticle modified exfoliated graphite electrode for the electrochemical detection of o-nitrophenol

Abstract

Keywords

ASJC Scopus subject areas

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