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Cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(II) ions

A photoelectrochemical (PEC) sensor with excellent sensitivity and detection toward copper (II) ions (Cu2+) was developed using a cadmium sulphide-reduced graphene oxide (CdS-rGO) nanocomposite on an indium tin oxide (ITO) surface, with triethanolamine (TEA) used as the sacrificial electron donor. T...

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Main Authors: Ibrahim, I., Lim, H. N., Huang, N. M., A., Pandikumar
Format: Article
Language:English
Published: Public Library of Science 2016
Online Access:http://psasir.upm.edu.my/id/eprint/55228/1/Cadmium%20sulphide-reduced%20graphene%20oxide-modified%20photoelectrode-based%20photoelectrochemical%20sensing%20platform%20for%20copper%28II%29%20ions.pdf
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spelling oai:psasir.upm.edu.my:55228 http://psasir.upm.edu.my/id/eprint/55228/ Cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(II) ions Ibrahim, I. Lim, H. N. Huang, N. M. A., Pandikumar A photoelectrochemical (PEC) sensor with excellent sensitivity and detection toward copper (II) ions (Cu2+) was developed using a cadmium sulphide-reduced graphene oxide (CdS-rGO) nanocomposite on an indium tin oxide (ITO) surface, with triethanolamine (TEA) used as the sacrificial electron donor. The CdS nanoparticles were initially synthesized via the aerosol-assisted chemical vapor deposition (AACVD) method using cadmium acetate and thiourea as the precursors to Cd2+ and S2-, respectively. Graphene oxide (GO) was then dip-coated onto the CdS electrode and sintered under an argon gas flow (50 mL/min) for the reduction process. The nanostructured CdS was adhered securely to the ITO by a continuous network of rGO that also acted as an avenue to intensify the transfer of electrons from the conduction band of CdS. The photoelectrochemical results indicated that the ITO/CdS-rGO photoelectrode could facilitate broad UV-visible light absorption, which would lead to a higher and steady-state photocurrent response in the presence of TEA in 0.1 M KCl. The photocurrent decreased with an increase in the concentration of Cu2+ ions. The photoelectrode response for Cu2+ ion detection had a linear range of 0.5-120 μM, with a limit of detection (LoD) of 16 nM. The proposed PEC sensor displayed ultra-sensitivity and good selectivity toward Cu2+ ion detection. Public Library of Science 2016-05 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/55228/1/Cadmium%20sulphide-reduced%20graphene%20oxide-modified%20photoelectrode-based%20photoelectrochemical%20sensing%20platform%20for%20copper%28II%29%20ions.pdf Ibrahim, I. and Lim, H. N. and Huang, N. M. and A., Pandikumar (2016) Cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(II) ions. PLOS ONE, 11 (5). pp. 1-18. ISSN 1932-6203 http://www.plosone.org/home.action 10.1371/journal.pone.0154557
institution UPM IR
collection UPM IR
language English
description A photoelectrochemical (PEC) sensor with excellent sensitivity and detection toward copper (II) ions (Cu2+) was developed using a cadmium sulphide-reduced graphene oxide (CdS-rGO) nanocomposite on an indium tin oxide (ITO) surface, with triethanolamine (TEA) used as the sacrificial electron donor. The CdS nanoparticles were initially synthesized via the aerosol-assisted chemical vapor deposition (AACVD) method using cadmium acetate and thiourea as the precursors to Cd2+ and S2-, respectively. Graphene oxide (GO) was then dip-coated onto the CdS electrode and sintered under an argon gas flow (50 mL/min) for the reduction process. The nanostructured CdS was adhered securely to the ITO by a continuous network of rGO that also acted as an avenue to intensify the transfer of electrons from the conduction band of CdS. The photoelectrochemical results indicated that the ITO/CdS-rGO photoelectrode could facilitate broad UV-visible light absorption, which would lead to a higher and steady-state photocurrent response in the presence of TEA in 0.1 M KCl. The photocurrent decreased with an increase in the concentration of Cu2+ ions. The photoelectrode response for Cu2+ ion detection had a linear range of 0.5-120 μM, with a limit of detection (LoD) of 16 nM. The proposed PEC sensor displayed ultra-sensitivity and good selectivity toward Cu2+ ion detection.
format Article
author Ibrahim, I.
Lim, H. N.
Huang, N. M.
A., Pandikumar
spellingShingle Ibrahim, I.
Lim, H. N.
Huang, N. M.
A., Pandikumar
Cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(II) ions
author_facet Ibrahim, I.
Lim, H. N.
Huang, N. M.
A., Pandikumar
author_sort Ibrahim, I.
title Cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(II) ions
title_short Cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(II) ions
title_full Cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(II) ions
title_fullStr Cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(II) ions
title_full_unstemmed Cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(II) ions
title_sort cadmium sulphide-reduced graphene oxide-modified photoelectrode-based photoelectrochemical sensing platform for copper(ii) ions
publisher Public Library of Science
publishDate 2016
url http://psasir.upm.edu.my/id/eprint/55228/1/Cadmium%20sulphide-reduced%20graphene%20oxide-modified%20photoelectrode-based%20photoelectrochemical%20sensing%20platform%20for%20copper%28II%29%20ions.pdf
_version_ 1819297527622533120
score 13.4562235

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