Modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of Hg(II) and Cd(II) in water

Water pollution resulting from heavy metal ions such as mercury and cadmium tends to have lethal effects on the environment and living organisms. This indicates the need for further research to develop on heavy metal sensors that are fast, potable and cost effective. In this research, Silicon Nanowi...

Full description

Saved in:

Bibliographic Details
Main Author:	Mohamad Zain, Siti Nur Zawani
Format:	Thesis
Language:	English
Published:	2015
Subjects:	Water - Pollution Electrochemical sensors Nanowires
Online Access:	http://psasir.upm.edu.my/id/eprint/67730/1/FS%202015%2061%20IR.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.67730
record_format	uketd_dc
spelling	my-upm-ir.677302019-03-21T00:28:55Z Modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of Hg(II) and Cd(II) in water 2015-05 Mohamad Zain, Siti Nur Zawani Water pollution resulting from heavy metal ions such as mercury and cadmium tends to have lethal effects on the environment and living organisms. This indicates the need for further research to develop on heavy metal sensors that are fast, potable and cost effective. In this research, Silicon Nanowires (SiNW’s), a 1-dimensional nanowire was used as a modifier for disposable screen printed carbon electrodes (SPCE) for detection of metal ions. The SiNW’s was characterized by different spectroscopic techniques and the application of SiNW’s on the surface of the electrode was found to increase the sensitivity of the electrode. The screen printed carbon electrode was modified by casting SiNW’s with 3-aminopropyl-triethoxysilane (APTES) onto the working electrode surface. The modified electrode (SiNW’s/APTES/SPCE) was then applied for Hg2+ and Cd2+ ion detection. Electrochemical studies using linear sweep stripping voltammetry performed with SiNW’s/APTES/SPCE were found to give a better response through the optimization of some analytical parameters. Concentration study of mercury with SiNW’s/SPCE gave linear calibrations and a detection limit value of 42.59 μg L−1 was achieved by applying deposition potential of -1.2V and deposition time of 160s. The electrode showed very good recovery indicating the accuracy of the method, while concentration study of cadmium with SiNW’s/SPCE gave a linear calibration with R2 = 0.994. A detection limit of 251.7 μg L−1 was also achieved by applying deposition potential of -1.2V and deposition time of 160s. Validation of the method with inductively coupled plasma-mass spectroscopy (ICP-MS) and atomic absorption spectroscopy showed very good correlation. This modified screen printed carbon electrodes with Silicon Nanowires (SiNW’s/APTES/SPCE) also found for simultaneously detection of Hg2+ and Cd2+ ions in the solution. Water - Pollution Electrochemical sensors Nanowires 2015-05 Thesis http://psasir.upm.edu.my/id/eprint/67730/ http://psasir.upm.edu.my/id/eprint/67730/1/FS%202015%2061%20IR.pdf text en public masters Universiti Putra Malaysia Water - Pollution Electrochemical sensors Nanowires
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Water - Pollution Electrochemical sensors Nanowires
spellingShingle	Water - Pollution Electrochemical sensors Nanowires Mohamad Zain, Siti Nur Zawani Modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of Hg(II) and Cd(II) in water
description	Water pollution resulting from heavy metal ions such as mercury and cadmium tends to have lethal effects on the environment and living organisms. This indicates the need for further research to develop on heavy metal sensors that are fast, potable and cost effective. In this research, Silicon Nanowires (SiNW’s), a 1-dimensional nanowire was used as a modifier for disposable screen printed carbon electrodes (SPCE) for detection of metal ions. The SiNW’s was characterized by different spectroscopic techniques and the application of SiNW’s on the surface of the electrode was found to increase the sensitivity of the electrode. The screen printed carbon electrode was modified by casting SiNW’s with 3-aminopropyl-triethoxysilane (APTES) onto the working electrode surface. The modified electrode (SiNW’s/APTES/SPCE) was then applied for Hg2+ and Cd2+ ion detection. Electrochemical studies using linear sweep stripping voltammetry performed with SiNW’s/APTES/SPCE were found to give a better response through the optimization of some analytical parameters. Concentration study of mercury with SiNW’s/SPCE gave linear calibrations and a detection limit value of 42.59 μg L−1 was achieved by applying deposition potential of -1.2V and deposition time of 160s. The electrode showed very good recovery indicating the accuracy of the method, while concentration study of cadmium with SiNW’s/SPCE gave a linear calibration with R2 = 0.994. A detection limit of 251.7 μg L−1 was also achieved by applying deposition potential of -1.2V and deposition time of 160s. Validation of the method with inductively coupled plasma-mass spectroscopy (ICP-MS) and atomic absorption spectroscopy showed very good correlation. This modified screen printed carbon electrodes with Silicon Nanowires (SiNW’s/APTES/SPCE) also found for simultaneously detection of Hg2+ and Cd2+ ions in the solution.
format	Thesis
qualification_level	Master's degree
author	Mohamad Zain, Siti Nur Zawani
author_facet	Mohamad Zain, Siti Nur Zawani
author_sort	Mohamad Zain, Siti Nur Zawani
title	Modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of Hg(II) and Cd(II) in water
title_short	Modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of Hg(II) and Cd(II) in water
title_full	Modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of Hg(II) and Cd(II) in water
title_fullStr	Modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of Hg(II) and Cd(II) in water
title_full_unstemmed	Modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of Hg(II) and Cd(II) in water
title_sort	modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of hg(ii) and cd(ii) in water
granting_institution	Universiti Putra Malaysia
publishDate	2015
url	http://psasir.upm.edu.my/id/eprint/67730/1/FS%202015%2061%20IR.pdf
_version_	1747812510697783296

Modification of screen printed carbon electrode with silicon nanowires for electrochemical detection of Hg(II) and Cd(II) in water

Similar Items