Graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and COSMO-RS quantum studies

We report synthesis, characterization and covalent fabrication of graphene nanosheets (GR) on Au electrode. The GR nanosheets were characterized by XRD, Raman spectroscopy, FESEM and TEM techniques. The GR nanosheets were functionalized by reduction of aryldiazonium salt (Cl−N2+–Ph–COOH) to produce...

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Main Authors: Rather, Jahangir Ahmad, Alsubhi, Zamzam, Khan, Imran, Khudaish, Emad, Kannan, Palanisamy
Other Authors: Singapore Centre for Environmental Life Sciences and Engineering
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/80348
http://hdl.handle.net/10220/50369
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-803482020-09-21T11:32:23Z Graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and COSMO-RS quantum studies Rather, Jahangir Ahmad Alsubhi, Zamzam Khan, Imran Khudaish, Emad Kannan, Palanisamy Singapore Centre for Environmental Life Sciences and Engineering Science::Biological sciences Endocrine Disruptor Graphene Interface We report synthesis, characterization and covalent fabrication of graphene nanosheets (GR) on Au electrode. The GR nanosheets were characterized by XRD, Raman spectroscopy, FESEM and TEM techniques. The GR nanosheets were functionalized by reduction of aryldiazonium salt (Cl−N2+–Ph–COOH) to produce GR–Ph–COOH. In another step, Au electrode was modified by cysteamine (Cyst) to form Au–S–CH2–CH2–NH2 surface. Finally, GR–Ph–COOH was covalently attached to Au–S–CH2–CH2–NH2 by carbodiimide chemistry. The GR–Cyst–Au interface was used for electrochemical determination of resorcinol (RS) in ionic liquid [C4mim] [Cl] system over a concentration range from 0.3 to 45.2 μM with a detection limit (LOD) of 0.02 μM. The faster electron transfers kinetics of RS in [C4 mim] [Cl] system was attributed to synergetic effects of GR nanosheets and [C4 mim] [Cl] medium. The GR–Cyst–Au interface was successfully applied for determination of RS in Garnier hair-color cream as a real sample analysis. Computational quantum approach i.e. COSMO-RS model was also used to study trend of interactions in a ternary mixture of water, RS and [C4 mim] [Cl] system for proposed RS sensor. Published version 2019-11-07T05:56:18Z 2019-12-06T13:47:42Z 2019-11-07T05:56:18Z 2019-12-06T13:47:42Z 2018 Journal Article Rather, J. A., Alsubhi, Z., Khan, I., Khudaish, E., & Kannan, P. (2018). Graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and COSMO-RS quantum studies. Journal of The Electrochemical Society, 165(3), H57-H66. doi:10.1149/2.1241802jes 0013-4651 https://hdl.handle.net/10356/80348 http://hdl.handle.net/10220/50369 10.1149/2.1241802jes en Journal of The Electrochemical Society © The Electrochemical Society, Inc. 2018. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in Journal of The Electrochemical Society, 155, 3, H57-H66. 10 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Science::Biological sciences
Endocrine Disruptor
Graphene Interface
spellingShingle Science::Biological sciences
Endocrine Disruptor
Graphene Interface
Rather, Jahangir Ahmad
Alsubhi, Zamzam
Khan, Imran
Khudaish, Emad
Kannan, Palanisamy
Graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and COSMO-RS quantum studies
description We report synthesis, characterization and covalent fabrication of graphene nanosheets (GR) on Au electrode. The GR nanosheets were characterized by XRD, Raman spectroscopy, FESEM and TEM techniques. The GR nanosheets were functionalized by reduction of aryldiazonium salt (Cl−N2+–Ph–COOH) to produce GR–Ph–COOH. In another step, Au electrode was modified by cysteamine (Cyst) to form Au–S–CH2–CH2–NH2 surface. Finally, GR–Ph–COOH was covalently attached to Au–S–CH2–CH2–NH2 by carbodiimide chemistry. The GR–Cyst–Au interface was used for electrochemical determination of resorcinol (RS) in ionic liquid [C4mim] [Cl] system over a concentration range from 0.3 to 45.2 μM with a detection limit (LOD) of 0.02 μM. The faster electron transfers kinetics of RS in [C4 mim] [Cl] system was attributed to synergetic effects of GR nanosheets and [C4 mim] [Cl] medium. The GR–Cyst–Au interface was successfully applied for determination of RS in Garnier hair-color cream as a real sample analysis. Computational quantum approach i.e. COSMO-RS model was also used to study trend of interactions in a ternary mixture of water, RS and [C4 mim] [Cl] system for proposed RS sensor.
author2 Singapore Centre for Environmental Life Sciences and Engineering
author_facet Singapore Centre for Environmental Life Sciences and Engineering
Rather, Jahangir Ahmad
Alsubhi, Zamzam
Khan, Imran
Khudaish, Emad
Kannan, Palanisamy
format Article
author Rather, Jahangir Ahmad
Alsubhi, Zamzam
Khan, Imran
Khudaish, Emad
Kannan, Palanisamy
author_sort Rather, Jahangir Ahmad
title Graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and COSMO-RS quantum studies
title_short Graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and COSMO-RS quantum studies
title_full Graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and COSMO-RS quantum studies
title_fullStr Graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and COSMO-RS quantum studies
title_full_unstemmed Graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and COSMO-RS quantum studies
title_sort graphene interface for detection of resorcinol an endocrine disruptor in solubilized ionic liquid system : electrochemical and cosmo-rs quantum studies
publishDate 2019
url https://hdl.handle.net/10356/80348
http://hdl.handle.net/10220/50369
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