Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation

The process where a light-activated catalyst is used to break down organic contaminant is known as photocatalysis. In the class of photocatalyst, titanium dioxide (TiO2) has isolated itself on top of the list and widely applied in environmental remediation including water treatment. In addition to t...

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Main Author:	Zayadi, Rabi’atul ‘Adawiyah
Format:	Thesis
Language:	English English English
Published:	2017
Subjects:	QD146-197 Inorganic chemistry
Online Access:	http://eprints.uthm.edu.my/854/1/24p%20RABIATUL%20ADAWIYAH%20ZAYADI.pdf http://eprints.uthm.edu.my/854/2/RABIATUL%20ADAWIYAH%20ZAYADI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/854/3/RABIATUL%20ADAWIYAH%20ZAYADI%20WATERMARK.pdf
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spelling	my-uthm-ep.8542021-09-06T05:40:20Z Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation 2017-09 Zayadi, Rabi’atul ‘Adawiyah QD146-197 Inorganic chemistry The process where a light-activated catalyst is used to break down organic contaminant is known as photocatalysis. In the class of photocatalyst, titanium dioxide (TiO2) has isolated itself on top of the list and widely applied in environmental remediation including water treatment. In addition to the worrying release of industrial dye containing organic pollutants that threaten the environment, TiO2 can be utilized to degrade dyes in the wastewater. To tune TiO2 into a better photocatalyst with enhanced photocatalytic activity under visible light irradiation, TiO2 was initially synthesized using peroxotitanic acid (PTA) method using two different solvents of distilled water and Zamzam water. Fluorine was then added into TiO2 to control the crystal phase and morphology of TiO2 nanoparticles which are proven by X-Ray Diffractometer (XRD) and Field Emission-Scanning Electron Microscope (FE-SEM) respectively. Fluorine-modified TiO2 (F-TiO2) revealed to be in single anatase form with the particle shape directed to ovoid shape. Gold nanoparticles (GNP) was also deposited on TiO2, producing Au-TiO2 to enhance the absorption in the visible light region as well to facilitate electron-hole separation. GNP stabilized using Acacia senegal and aloe vera were characterized using Ultraviolet-Visible (UV-Vis) spectrophotometer. Stabilization of GNP was found to be better using Acacia senegal with 2 : 1 weight ratio of stabilizer to gold precursor as compared to aloe vera. The photocatalytic activity of synthesized TiO2 was carried out with 0.04 g/L Reactive Blue 19 dye aided with blue light (475 nm) to activate the photocatalyst. Photocatalysts synthesized from distilled water were found to display higher photocatalytic activity than Zamzam samples. Within 120 minutes of reaction, the highest percentage of degradation of 49.23 % was recorded by Au(AS)/F-P-TiO2 (HF) which was characterized to be anatase, ovoid shape, crystallite size of 30.71 nm and band gap energy of 3.22 eV. The data presented in this study thus recognized the ability of TiO2 to carry out photodegradation of reactive dye in the visible light region with credits given to the action of fluorine and gold for revamping the photocatalytic properties of TiO2. 2017-09 Thesis http://eprints.uthm.edu.my/854/ http://eprints.uthm.edu.my/854/1/24p%20RABIATUL%20ADAWIYAH%20ZAYADI.pdf text en public http://eprints.uthm.edu.my/854/2/RABIATUL%20ADAWIYAH%20ZAYADI%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/854/3/RABIATUL%20ADAWIYAH%20ZAYADI%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Fakulti Sains Gunaan dan Teknologi
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	QD146-197 Inorganic chemistry
spellingShingle	QD146-197 Inorganic chemistry Zayadi, Rabi’atul ‘Adawiyah Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation
description	The process where a light-activated catalyst is used to break down organic contaminant is known as photocatalysis. In the class of photocatalyst, titanium dioxide (TiO2) has isolated itself on top of the list and widely applied in environmental remediation including water treatment. In addition to the worrying release of industrial dye containing organic pollutants that threaten the environment, TiO2 can be utilized to degrade dyes in the wastewater. To tune TiO2 into a better photocatalyst with enhanced photocatalytic activity under visible light irradiation, TiO2 was initially synthesized using peroxotitanic acid (PTA) method using two different solvents of distilled water and Zamzam water. Fluorine was then added into TiO2 to control the crystal phase and morphology of TiO2 nanoparticles which are proven by X-Ray Diffractometer (XRD) and Field Emission-Scanning Electron Microscope (FE-SEM) respectively. Fluorine-modified TiO2 (F-TiO2) revealed to be in single anatase form with the particle shape directed to ovoid shape. Gold nanoparticles (GNP) was also deposited on TiO2, producing Au-TiO2 to enhance the absorption in the visible light region as well to facilitate electron-hole separation. GNP stabilized using Acacia senegal and aloe vera were characterized using Ultraviolet-Visible (UV-Vis) spectrophotometer. Stabilization of GNP was found to be better using Acacia senegal with 2 : 1 weight ratio of stabilizer to gold precursor as compared to aloe vera. The photocatalytic activity of synthesized TiO2 was carried out with 0.04 g/L Reactive Blue 19 dye aided with blue light (475 nm) to activate the photocatalyst. Photocatalysts synthesized from distilled water were found to display higher photocatalytic activity than Zamzam samples. Within 120 minutes of reaction, the highest percentage of degradation of 49.23 % was recorded by Au(AS)/F-P-TiO2 (HF) which was characterized to be anatase, ovoid shape, crystallite size of 30.71 nm and band gap energy of 3.22 eV. The data presented in this study thus recognized the ability of TiO2 to carry out photodegradation of reactive dye in the visible light region with credits given to the action of fluorine and gold for revamping the photocatalytic properties of TiO2.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Zayadi, Rabi’atul ‘Adawiyah
author_facet	Zayadi, Rabi’atul ‘Adawiyah
author_sort	Zayadi, Rabi’atul ‘Adawiyah
title	Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation
title_short	Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation
title_full	Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation
title_fullStr	Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation
title_full_unstemmed	Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation
title_sort	effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of tio2 under visible light irradiation
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Sains Gunaan dan Teknologi
publishDate	2017
url	http://eprints.uthm.edu.my/854/1/24p%20RABIATUL%20ADAWIYAH%20ZAYADI.pdf http://eprints.uthm.edu.my/854/2/RABIATUL%20ADAWIYAH%20ZAYADI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/854/3/RABIATUL%20ADAWIYAH%20ZAYADI%20WATERMARK.pdf
_version_	1747830694443220992

Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation

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