A Poly(Propylene Imine) Dendrimer and Carbon Black Modified Flexible Screen Printed Electrochemical Sensor for Lead and Cadmium Co-detection

Vincenzo Mazzaracchio; Luthando Tshwenya; Danila Moscone; Fabiana Arduini; Omotayo A. Arotiba

doi:10.1002/elan.202060284

A Poly(Propylene Imine) Dendrimer and Carbon Black Modified Flexible Screen Printed Electrochemical Sensor for Lead and Cadmium Co-detection

Vincenzo Mazzaracchio, Luthando Tshwenya, Danila Moscone, Fabiana Arduini, Omotayo A. Arotiba

Chemical Sciences

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

16 Citations (Scopus)

Abstract

Towards the development of miniaturised and low-cost sensors for heavy metals detection in water, herein we describe an electrochemical sensor for the co-detection of lead and cadmium. The sensor was developed using screen-printed electrode modified with a composite of poly(propylene imine) dendrimer and carbon black. The electrode was modified by drop casting of the carbon black and electrodeposition of the poly(propylene imine) dendrimer. This modified electrode (sensor) was characterised by cyclic voltammetry and electrochemical impedance spectroscopy, revealing improved electrochemical performances. Square wave anodic stripping voltammetry (SWASV) was used to achieve the simultaneous detection of Pb(II) and Cd(II) at trace level, obtaining satisfactory LOD of 3.6 ppb and 15.3 ppb respectively; and sensitivity of 0.49 μA/ppb and 0.57 μA/ppb in tap water.

Original language	English
Pages (from-to)	3009-3016
Number of pages	8
Journal	Electroanalysis
Volume	32
Issue number	12
DOIs	https://doi.org/10.1002/elan.202060284
Publication status	Published - Dec 2020

Keywords

Poly(propylene imine) dendrimer
cadmium
carbon black
electrochemical sensor
lead
screen printed electrode

ASJC Scopus subject areas

Analytical Chemistry
Electrochemistry

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10.1002/elan.202060284

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title = "A Poly(Propylene Imine) Dendrimer and Carbon Black Modified Flexible Screen Printed Electrochemical Sensor for Lead and Cadmium Co-detection",

abstract = "Towards the development of miniaturised and low-cost sensors for heavy metals detection in water, herein we describe an electrochemical sensor for the co-detection of lead and cadmium. The sensor was developed using screen-printed electrode modified with a composite of poly(propylene imine) dendrimer and carbon black. The electrode was modified by drop casting of the carbon black and electrodeposition of the poly(propylene imine) dendrimer. This modified electrode (sensor) was characterised by cyclic voltammetry and electrochemical impedance spectroscopy, revealing improved electrochemical performances. Square wave anodic stripping voltammetry (SWASV) was used to achieve the simultaneous detection of Pb(II) and Cd(II) at trace level, obtaining satisfactory LOD of 3.6 ppb and 15.3 ppb respectively; and sensitivity of 0.49 μA/ppb and 0.57 μA/ppb in tap water.",

keywords = "Poly(propylene imine) dendrimer, cadmium, carbon black, electrochemical sensor, lead, screen printed electrode",

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T1 - A Poly(Propylene Imine) Dendrimer and Carbon Black Modified Flexible Screen Printed Electrochemical Sensor for Lead and Cadmium Co-detection

AU - Mazzaracchio, Vincenzo

AU - Tshwenya, Luthando

AU - Moscone, Danila

AU - Arduini, Fabiana

AU - Arotiba, Omotayo A.

PY - 2020/12

Y1 - 2020/12

N2 - Towards the development of miniaturised and low-cost sensors for heavy metals detection in water, herein we describe an electrochemical sensor for the co-detection of lead and cadmium. The sensor was developed using screen-printed electrode modified with a composite of poly(propylene imine) dendrimer and carbon black. The electrode was modified by drop casting of the carbon black and electrodeposition of the poly(propylene imine) dendrimer. This modified electrode (sensor) was characterised by cyclic voltammetry and electrochemical impedance spectroscopy, revealing improved electrochemical performances. Square wave anodic stripping voltammetry (SWASV) was used to achieve the simultaneous detection of Pb(II) and Cd(II) at trace level, obtaining satisfactory LOD of 3.6 ppb and 15.3 ppb respectively; and sensitivity of 0.49 μA/ppb and 0.57 μA/ppb in tap water.

AB - Towards the development of miniaturised and low-cost sensors for heavy metals detection in water, herein we describe an electrochemical sensor for the co-detection of lead and cadmium. The sensor was developed using screen-printed electrode modified with a composite of poly(propylene imine) dendrimer and carbon black. The electrode was modified by drop casting of the carbon black and electrodeposition of the poly(propylene imine) dendrimer. This modified electrode (sensor) was characterised by cyclic voltammetry and electrochemical impedance spectroscopy, revealing improved electrochemical performances. Square wave anodic stripping voltammetry (SWASV) was used to achieve the simultaneous detection of Pb(II) and Cd(II) at trace level, obtaining satisfactory LOD of 3.6 ppb and 15.3 ppb respectively; and sensitivity of 0.49 μA/ppb and 0.57 μA/ppb in tap water.

KW - Poly(propylene imine) dendrimer

KW - cadmium

KW - carbon black

KW - electrochemical sensor

KW - lead

KW - screen printed electrode

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DO - 10.1002/elan.202060284

M3 - Article

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SN - 1040-0397

VL - 32

SP - 3009

EP - 3016

JO - Electroanalysis

JF - Electroanalysis

IS - 12

ER -

A Poly(Propylene Imine) Dendrimer and Carbon Black Modified Flexible Screen Printed Electrochemical Sensor for Lead and Cadmium Co-detection

Abstract

Keywords

ASJC Scopus subject areas

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