Li/Zno And Chitosan/Li/Zno Quantum Dots For The Photocatalytic Oxidation Of Oxytetracycline

Quantum dots are a class of nano-sized materials that have the potential to be developed into photocatalysts due to their ability to absorb visible light, generate multiple excitons due to quantum confinement, have luminescent properties, and have a high surface-to-volume ratio. This study is divide...

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Main Author:	Jasni, Normawati
Format:	Thesis
Language:	English
Published:	2023
Subjects:	QD1-999 Chemistry
Online Access:	http://eprints.usm.my/60448/1/24%20Pages%20from%20NORMAWATI%20BINTI%20JASNI.pdf
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id	my-usm-ep.60448
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spelling	my-usm-ep.604482024-04-29T01:40:48Z Li/Zno And Chitosan/Li/Zno Quantum Dots For The Photocatalytic Oxidation Of Oxytetracycline 2023-04 Jasni, Normawati QD1-999 Chemistry Quantum dots are a class of nano-sized materials that have the potential to be developed into photocatalysts due to their ability to absorb visible light, generate multiple excitons due to quantum confinement, have luminescent properties, and have a high surface-to-volume ratio. This study is divided into two parts. In the first part, Li/ZnO quantum dots (Li/ZnO QDs) was synthesized via microwave methods utilizing Li+ ion as capping agent. In the second part, the Li/ZnO QDs were encapsulated with chitosan (CHT/Li/ZnO QDs) to enhance the physicochemical properties of Li/ZnO QDs. The synthesised photocatalyst were characterised using Fourier-transform infrared (FT-IR) spectrometer, x-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), scanning electron microscope (SEM), UV-vis diffuse reflectance spectroscopy (UV-DRS), photoluminescence (PL), nitrogen adsorption-desorption analysis (NAD) analysis, atomic force microscopy (AFM), x-ray photoelectron spectroscopy (XPS) and thermal stability (TGA). The SEM analysis shows that adding chitosan prevented the Li/ZnO QDs from agglomerating. The AFM analysis measured the surface roughness of Li/ZnO QDs and CHT/Li/ZnO QDs to be 21.7 to 33.2 nm, respectively. The increase is due to the ability of chitosan to form loosely packed smaller grains. The XRD analysis indicates that both photocatalysts contains hexagonal wurtzite type crystal structure. 2023-04 Thesis http://eprints.usm.my/60448/ http://eprints.usm.my/60448/1/24%20Pages%20from%20NORMAWATI%20BINTI%20JASNI.pdf application/pdf en public masters Perpustakaan Hamzah Sendut Pusat Pengajian Sains Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QD1-999 Chemistry
spellingShingle	QD1-999 Chemistry Jasni, Normawati Li/Zno And Chitosan/Li/Zno Quantum Dots For The Photocatalytic Oxidation Of Oxytetracycline
description	Quantum dots are a class of nano-sized materials that have the potential to be developed into photocatalysts due to their ability to absorb visible light, generate multiple excitons due to quantum confinement, have luminescent properties, and have a high surface-to-volume ratio. This study is divided into two parts. In the first part, Li/ZnO quantum dots (Li/ZnO QDs) was synthesized via microwave methods utilizing Li+ ion as capping agent. In the second part, the Li/ZnO QDs were encapsulated with chitosan (CHT/Li/ZnO QDs) to enhance the physicochemical properties of Li/ZnO QDs. The synthesised photocatalyst were characterised using Fourier-transform infrared (FT-IR) spectrometer, x-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), scanning electron microscope (SEM), UV-vis diffuse reflectance spectroscopy (UV-DRS), photoluminescence (PL), nitrogen adsorption-desorption analysis (NAD) analysis, atomic force microscopy (AFM), x-ray photoelectron spectroscopy (XPS) and thermal stability (TGA). The SEM analysis shows that adding chitosan prevented the Li/ZnO QDs from agglomerating. The AFM analysis measured the surface roughness of Li/ZnO QDs and CHT/Li/ZnO QDs to be 21.7 to 33.2 nm, respectively. The increase is due to the ability of chitosan to form loosely packed smaller grains. The XRD analysis indicates that both photocatalysts contains hexagonal wurtzite type crystal structure.
format	Thesis
qualification_level	Master's degree
author	Jasni, Normawati
author_facet	Jasni, Normawati
author_sort	Jasni, Normawati
title	Li/Zno And Chitosan/Li/Zno Quantum Dots For The Photocatalytic Oxidation Of Oxytetracycline
title_short	Li/Zno And Chitosan/Li/Zno Quantum Dots For The Photocatalytic Oxidation Of Oxytetracycline
title_full	Li/Zno And Chitosan/Li/Zno Quantum Dots For The Photocatalytic Oxidation Of Oxytetracycline
title_fullStr	Li/Zno And Chitosan/Li/Zno Quantum Dots For The Photocatalytic Oxidation Of Oxytetracycline
title_full_unstemmed	Li/Zno And Chitosan/Li/Zno Quantum Dots For The Photocatalytic Oxidation Of Oxytetracycline
title_sort	li/zno and chitosan/li/zno quantum dots for the photocatalytic oxidation of oxytetracycline
granting_institution	Perpustakaan Hamzah Sendut
granting_department	Pusat Pengajian Sains Kimia
publishDate	2023
url	http://eprints.usm.my/60448/1/24%20Pages%20from%20NORMAWATI%20BINTI%20JASNI.pdf
_version_	1804888938894065664

Li/Zno And Chitosan/Li/Zno Quantum Dots For The Photocatalytic Oxidation Of Oxytetracycline

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