Determination of mercury(II) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (IR)

This study aimed to develop a mercury(II) sensor and to identify its ability in mercury(II) determination. A mercury(II) sensor was developed by using singlewalled carbon nanotubes (SWCNTs) paste electrode modified with ZnIAl layered double hydroxide-3(4-methoxyphenyl)propionate nanocomposite (ZnIAI...

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Main Author:	Sharifah Norain Mohd Sharif
Format:	thesis
Language:	eng
Published:	2015
Subjects:	QD Chemistry
Online Access:	https://ir.upsi.edu.my/detailsg.php?det=1211
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spelling	oai:ir.upsi.edu.my:12112020-02-27 Determination of mercury(II) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (IR) 2015 Sharifah Norain Mohd Sharif QD Chemistry This study aimed to develop a mercury(II) sensor and to identify its ability in mercury(II) determination. A mercury(II) sensor was developed by using singlewalled carbon nanotubes (SWCNTs) paste electrode modified with ZnIAl layered double hydroxide-3(4-methoxyphenyl)propionate nanocomposite (ZnIAI-LDH-MPP). Determination of optimum conditions for the detector was done by voltammetry method and subsequently confirmed by the double potential-step chronocoulometry. The results show that the optimum conditions were observed at electrode composition 2.5% (w/w) of ZnIAI-LDH-MPP/SWCNTs, OA M potassium chloride, pH 4.0, and scan rate of 100 mV S-I. The sensor exhibited wide linear range from 1.0 x l O" M to 1.0 x1O-3 M mercury(II) and 1.0 xl O" M to 1.0 xlO-7M mercury(II), with a detection limit of 1.0 xlO-lO M mercury(II). The high sensitivity of the proposed electrode towards mercury(II) was confirmed by double potential-step chronocoulometry which indicated these values; diffusion coefficient: 1.5445 x 10-9 cm2 S-I, surface charge: 524.5 IlC s-Yz and surface coverage: 4.41 x 10-2 mol cm-2 The presence of 25-fold concentration of most metal ions had no influence on the anodic peak current. The analysis of real samples were also compared with those obtained by the proposed electrode and the mercury analyzer, which shows no significant difference between the results obtained by the two methods based on a r-test (at 95% confidence level). Thus, it can be concluded that the paste electrode modified with ZnIA1layered double hydroxide-3(4-methoxyphenyl)propionate nanocomposite (ZnlAI-LDH-MPP) is able to detect mercury(II). With characteristics such as high sensitivity, selectivity and repeatability, the electrode is proposed as the appropriate alternative for the determination of mercury(II). 2015 thesis https://ir.upsi.edu.my/detailsg.php?det=1211 https://ir.upsi.edu.my/detailsg.php?det=1211 text eng closedAccess Masters Universiti Pendidikan Sultan Idris Fakulti Sains dan Matematik N/A
institution	Universiti Pendidikan Sultan Idris
collection	UPSI Digital Repository
language	eng
topic	QD Chemistry
spellingShingle	QD Chemistry Sharifah Norain Mohd Sharif Determination of mercury(II) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (IR)
description	This study aimed to develop a mercury(II) sensor and to identify its ability in mercury(II) determination. A mercury(II) sensor was developed by using singlewalled carbon nanotubes (SWCNTs) paste electrode modified with ZnIAl layered double hydroxide-3(4-methoxyphenyl)propionate nanocomposite (ZnIAI-LDH-MPP). Determination of optimum conditions for the detector was done by voltammetry method and subsequently confirmed by the double potential-step chronocoulometry. The results show that the optimum conditions were observed at electrode composition 2.5% (w/w) of ZnIAI-LDH-MPP/SWCNTs, OA M potassium chloride, pH 4.0, and scan rate of 100 mV S-I. The sensor exhibited wide linear range from 1.0 x l O" M to 1.0 x1O-3 M mercury(II) and 1.0 xl O" M to 1.0 xlO-7M mercury(II), with a detection limit of 1.0 xlO-lO M mercury(II). The high sensitivity of the proposed electrode towards mercury(II) was confirmed by double potential-step chronocoulometry which indicated these values; diffusion coefficient: 1.5445 x 10-9 cm2 S-I, surface charge: 524.5 IlC s-Yz and surface coverage: 4.41 x 10-2 mol cm-2 The presence of 25-fold concentration of most metal ions had no influence on the anodic peak current. The analysis of real samples were also compared with those obtained by the proposed electrode and the mercury analyzer, which shows no significant difference between the results obtained by the two methods based on a r-test (at 95% confidence level). Thus, it can be concluded that the paste electrode modified with ZnIA1layered double hydroxide-3(4-methoxyphenyl)propionate nanocomposite (ZnlAI-LDH-MPP) is able to detect mercury(II). With characteristics such as high sensitivity, selectivity and repeatability, the electrode is proposed as the appropriate alternative for the determination of mercury(II).
format	thesis
qualification_name
qualification_level	Master's degree
author	Sharifah Norain Mohd Sharif
author_facet	Sharifah Norain Mohd Sharif
author_sort	Sharifah Norain Mohd Sharif
title	Determination of mercury(II) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (IR)
title_short	Determination of mercury(II) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (IR)
title_full	Determination of mercury(II) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (IR)
title_fullStr	Determination of mercury(II) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (IR)
title_full_unstemmed	Determination of mercury(II) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (IR)
title_sort	determination of mercury(ii) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (ir)
granting_institution	Universiti Pendidikan Sultan Idris
granting_department	Fakulti Sains dan Matematik
publishDate	2015
url	https://ir.upsi.edu.my/detailsg.php?det=1211
_version_	1747832945692901376

Determination of mercury(II) by single-walled carbon nanotubes paste electrode modified with zincaluminium layered double hydroxide-3(4-methoxyphenyl) propionate nanocomposite (IR)

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