Aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples

A sensitive electrochemical sensor based on aluminium-based metal-organic framework (CAU-1) deposited glassy carbon electrode (GCE) was utilized to detect hydroquinone (HQ), an environmental pollutant in the water sample. The synthesized CAU-1 was characterized by Fourier transform infrared (FT-IR)...

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Main Author:	Sim, Siew Ming
Format:	Thesis
Language:	English
Published:	2020
Subjects:	Electrochemical sensors Hydroquinone Metallic composites
Online Access:	http://psasir.upm.edu.my/id/eprint/98090/1/ITMA%202021%2010%20IR.pdf
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spelling	my-upm-ir.980902022-07-19T01:02:18Z Aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples 2020-10 Sim, Siew Ming A sensitive electrochemical sensor based on aluminium-based metal-organic framework (CAU-1) deposited glassy carbon electrode (GCE) was utilized to detect hydroquinone (HQ), an environmental pollutant in the water sample. The synthesized CAU-1 was characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDS). The FT-IR results revealed the C=O vibrations presented in the as-synthesized CAU-1 sample which proved the incorporation of the amino-terephthalic acid in CAU-1. Besides, since the XRD pattern obtained for the as-synthesized CAU-1 sample was in good agreement with the simulated CAU-1 (CCDC: 723320), this strongly proved the successful synthesized of the CAU-1. Furthermore, CAU-1 showed rod-shaped morphology with an average length of 280 ± 33 nm through SEM analysis. Besides, CAU-1 had a Langmuir surface area of 1349 m2g-1 and a micropore volume of 0.41 cm3 g-1. The CAU-1 was successfully fabricated on GCE using nafion as a immobilization matrix. The electrochemical behavior of the CAU-1/GCE was studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis. The EIS result proved that the modified CAU-1/GCE had lower resistance, which is 683 Ω compared to bare GCE. This indicated that CAU-1 with high porosity and high surface area had contributed to the fast electron transfer between electrode-electrolyte interface. The electrochemical behavior of HQ was investigated at CAU-1/GCE surface and studied the kinetics of HQ oxidation. The CAU-1 fabricated electrode highly catalyzed the oxidation of HQ than the bare GCE. The CAU-1/GCE was proven to have excellent repeatability with relative standard deviation (RSD) of 0.69% for the same sensor that runs 20 cycles consecutively and RSD of 3.96% for four sensors reproduced by using the same procedure. Besides, this sensor also shows good selectivity and anti-interference properties in HQ detection with the detection limit of 0.015 μM with an excellent sensitivity of 1555.7 μA/mM/cm2. Furthermore, the recovery of HQ was 99.34 % to 103.93 % which proved the practical applicability and reliability of the modified CAU-1/GCE in the real-life application. Electrochemical sensors Hydroquinone Metallic composites 2020-10 Thesis http://psasir.upm.edu.my/id/eprint/98090/ http://psasir.upm.edu.my/id/eprint/98090/1/ITMA%202021%2010%20IR.pdf text en public masters Universiti Putra Malaysia Electrochemical sensors Hydroquinone Metallic composites Lim, Janet Hong Ngee
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Lim, Janet Hong Ngee
topic	Electrochemical sensors Hydroquinone Metallic composites
spellingShingle	Electrochemical sensors Hydroquinone Metallic composites Sim, Siew Ming Aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples
description	A sensitive electrochemical sensor based on aluminium-based metal-organic framework (CAU-1) deposited glassy carbon electrode (GCE) was utilized to detect hydroquinone (HQ), an environmental pollutant in the water sample. The synthesized CAU-1 was characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDS). The FT-IR results revealed the C=O vibrations presented in the as-synthesized CAU-1 sample which proved the incorporation of the amino-terephthalic acid in CAU-1. Besides, since the XRD pattern obtained for the as-synthesized CAU-1 sample was in good agreement with the simulated CAU-1 (CCDC: 723320), this strongly proved the successful synthesized of the CAU-1. Furthermore, CAU-1 showed rod-shaped morphology with an average length of 280 ± 33 nm through SEM analysis. Besides, CAU-1 had a Langmuir surface area of 1349 m2g-1 and a micropore volume of 0.41 cm3 g-1. The CAU-1 was successfully fabricated on GCE using nafion as a immobilization matrix. The electrochemical behavior of the CAU-1/GCE was studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis. The EIS result proved that the modified CAU-1/GCE had lower resistance, which is 683 Ω compared to bare GCE. This indicated that CAU-1 with high porosity and high surface area had contributed to the fast electron transfer between electrode-electrolyte interface. The electrochemical behavior of HQ was investigated at CAU-1/GCE surface and studied the kinetics of HQ oxidation. The CAU-1 fabricated electrode highly catalyzed the oxidation of HQ than the bare GCE. The CAU-1/GCE was proven to have excellent repeatability with relative standard deviation (RSD) of 0.69% for the same sensor that runs 20 cycles consecutively and RSD of 3.96% for four sensors reproduced by using the same procedure. Besides, this sensor also shows good selectivity and anti-interference properties in HQ detection with the detection limit of 0.015 μM with an excellent sensitivity of 1555.7 μA/mM/cm2. Furthermore, the recovery of HQ was 99.34 % to 103.93 % which proved the practical applicability and reliability of the modified CAU-1/GCE in the real-life application.
format	Thesis
qualification_level	Master's degree
author	Sim, Siew Ming
author_facet	Sim, Siew Ming
author_sort	Sim, Siew Ming
title	Aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples
title_short	Aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples
title_full	Aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples
title_fullStr	Aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples
title_full_unstemmed	Aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples
title_sort	aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples
granting_institution	Universiti Putra Malaysia
publishDate	2020
url	http://psasir.upm.edu.my/id/eprint/98090/1/ITMA%202021%2010%20IR.pdf
_version_	1747813838654275584

Aluminium-based metal-organic framework-fabricated electrochemical sensor for ultrasensitive hydroquinone hazard detection in water samples

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