The Multifunctionalised TiO2/Ag/Cellulose Acetate Photocatalyst with Enhanced Photodegradation and Antibacterial Activities

Titanium dioxide, TiO2 photocatalyst has been greatly employed in the photocatalytic treatment of wastewater due to its excellent properties. The combined effects of doping and the inclusion of support material such as cellulose acetate (CA) can enhance the photocatalytic efficiency of TiO2 photocat...

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التفاصيل البيبلوغرافية
المؤلف الرئيسي:	Feniellia Diwvya Anak, Kutiang
التنسيق:	أطروحة
اللغة:	English English English
منشور في:	2023
الموضوعات:	QD Chemistry
الوصول للمادة أونلاين:	http://ir.unimas.my/id/eprint/43252/3/Feniellia%20Diwvya_dsva.pdf http://ir.unimas.my/id/eprint/43252/4/Thesis%20MSc._Feniellia%20Diwvya%20-24%20page.pdf http://ir.unimas.my/id/eprint/43252/5/Thesis%20MSc._Feniellia%20Diwvya.ftext.pdf
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id	my-unimas-ir.43252
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spelling	my-unimas-ir.432522023-11-02T09:54:19Z The Multifunctionalised TiO2/Ag/Cellulose Acetate Photocatalyst with Enhanced Photodegradation and Antibacterial Activities 2023-11-02 Feniellia Diwvya Anak, Kutiang QD Chemistry Titanium dioxide, TiO2 photocatalyst has been greatly employed in the photocatalytic treatment of wastewater due to its excellent properties. The combined effects of doping and the inclusion of support material such as cellulose acetate (CA) can enhance the photocatalytic efficiency of TiO2 photocatalysts. In this study, TiO2 was synthesised via a green solvent template, ionic liquid, IL (1-butylimidazolium acetate) to produce high surface area photocatalyst and combined with silver (Ag) dopant to improve its photocatalytic performance in visible light. CA was added as support in the photocatalyst for the degradation of multiple dyes namely methylene blue (MB), methyl orange (MO), and rhodamine B (RhB). This study investigated the effect of different volumes of IL (0.5 mL – 5.0 mL) used in the synthesis of TiO2 via the sol-gel method, the effect of different Ag concentrations (0.5 wt% - 5.0 wt%) and CA concentrations (0.5 wt% - 5 wt%) on the photocatalytic performance of TiO2/Ag. The photocatalytic ability of TiO2-1/Ag 2 %/CA 0.5% photocatalyst under various operating parameters such as photocatalyst dosage, initial dye concentration, initial pH and effect of radical scavenger was investigated. The recyclability of TiO2-1/Ag 2 %/CA 0.5% was also determined. The characterisation of TiO2- 1/Ag 2 %/CA 0.5% photocatalyst via X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Energy Dispersive X-Ray (EDX), Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) analysis revealed the presence of Ag and CA on the surface of TiO2. Brunauer Emmett Teller (BET) surface area analysis has shown that the inclusion of IL in the synthesis greatly increased the surface area of TiO2 from 130.9 m2/g to 174.8 m2/g. Based on the preliminary experiments, 1.0 mL of IL, 0.5 wt% of Ag and 2.0 wt% of CA contributed to the highest photocatalytic degradation of TiO2/Ag/CA photocatalyst and were chosen for further studies. TiO2/Ag/CA (IL: 3 mL, Ag:2 wt% & CA: 0.5%) showed the highest MB dye removal in individual and mixed dye conditions (MB, MO and RhB) after 120 min of treatment time upon UVA irradiation (λ = 365 nm) under solution with pH 7.4. The antibacterial activity of TiO2-1/Ag 2 %/CA 0.5% investigated via disc diffusion method against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria demonstrated inhibition zones, indicating antibacterial effectiveness of TiO2-1/Ag 2 %/CA 0.5%. As wastewater treatment requires the removal of chemical pollutants and unwanted biological components, TiO2-1/Ag 2 %/CA 0.5% photocatalyst depicted in this study can be a promising degradative tool to meet this dual goal with high efficiency. Universiti Malaysia Sarawak 2023-11 Thesis http://ir.unimas.my/id/eprint/43252/ http://ir.unimas.my/id/eprint/43252/3/Feniellia%20Diwvya_dsva.pdf text en staffonly http://ir.unimas.my/id/eprint/43252/4/Thesis%20MSc._Feniellia%20Diwvya%20-24%20page.pdf text en public http://ir.unimas.my/id/eprint/43252/5/Thesis%20MSc._Feniellia%20Diwvya.ftext.pdf text en validuser masters FACULTY OF RESOURCE SCIENCE & TECHNOLOGY, UNIVERSITI MALAYSIA SARAWAK CHEMISTRY
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English English English
topic	QD Chemistry
spellingShingle	QD Chemistry Feniellia Diwvya Anak, Kutiang The Multifunctionalised TiO2/Ag/Cellulose Acetate Photocatalyst with Enhanced Photodegradation and Antibacterial Activities
description	Titanium dioxide, TiO2 photocatalyst has been greatly employed in the photocatalytic treatment of wastewater due to its excellent properties. The combined effects of doping and the inclusion of support material such as cellulose acetate (CA) can enhance the photocatalytic efficiency of TiO2 photocatalysts. In this study, TiO2 was synthesised via a green solvent template, ionic liquid, IL (1-butylimidazolium acetate) to produce high surface area photocatalyst and combined with silver (Ag) dopant to improve its photocatalytic performance in visible light. CA was added as support in the photocatalyst for the degradation of multiple dyes namely methylene blue (MB), methyl orange (MO), and rhodamine B (RhB). This study investigated the effect of different volumes of IL (0.5 mL – 5.0 mL) used in the synthesis of TiO2 via the sol-gel method, the effect of different Ag concentrations (0.5 wt% - 5.0 wt%) and CA concentrations (0.5 wt% - 5 wt%) on the photocatalytic performance of TiO2/Ag. The photocatalytic ability of TiO2-1/Ag 2 %/CA 0.5% photocatalyst under various operating parameters such as photocatalyst dosage, initial dye concentration, initial pH and effect of radical scavenger was investigated. The recyclability of TiO2-1/Ag 2 %/CA 0.5% was also determined. The characterisation of TiO2- 1/Ag 2 %/CA 0.5% photocatalyst via X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Energy Dispersive X-Ray (EDX), Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) analysis revealed the presence of Ag and CA on the surface of TiO2. Brunauer Emmett Teller (BET) surface area analysis has shown that the inclusion of IL in the synthesis greatly increased the surface area of TiO2 from 130.9 m2/g to 174.8 m2/g. Based on the preliminary experiments, 1.0 mL of IL, 0.5 wt% of Ag and 2.0 wt% of CA contributed to the highest photocatalytic degradation of TiO2/Ag/CA photocatalyst and were chosen for further studies. TiO2/Ag/CA (IL: 3 mL, Ag:2 wt% & CA: 0.5%) showed the highest MB dye removal in individual and mixed dye conditions (MB, MO and RhB) after 120 min of treatment time upon UVA irradiation (λ = 365 nm) under solution with pH 7.4. The antibacterial activity of TiO2-1/Ag 2 %/CA 0.5% investigated via disc diffusion method against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria demonstrated inhibition zones, indicating antibacterial effectiveness of TiO2-1/Ag 2 %/CA 0.5%. As wastewater treatment requires the removal of chemical pollutants and unwanted biological components, TiO2-1/Ag 2 %/CA 0.5% photocatalyst depicted in this study can be a promising degradative tool to meet this dual goal with high efficiency.
format	Thesis
qualification_level	Master's degree
author	Feniellia Diwvya Anak, Kutiang
author_facet	Feniellia Diwvya Anak, Kutiang
author_sort	Feniellia Diwvya Anak, Kutiang
title	The Multifunctionalised TiO2/Ag/Cellulose Acetate Photocatalyst with Enhanced Photodegradation and Antibacterial Activities
title_short	The Multifunctionalised TiO2/Ag/Cellulose Acetate Photocatalyst with Enhanced Photodegradation and Antibacterial Activities
title_full	The Multifunctionalised TiO2/Ag/Cellulose Acetate Photocatalyst with Enhanced Photodegradation and Antibacterial Activities
title_fullStr	The Multifunctionalised TiO2/Ag/Cellulose Acetate Photocatalyst with Enhanced Photodegradation and Antibacterial Activities
title_full_unstemmed	The Multifunctionalised TiO2/Ag/Cellulose Acetate Photocatalyst with Enhanced Photodegradation and Antibacterial Activities
title_sort	multifunctionalised tio2/ag/cellulose acetate photocatalyst with enhanced photodegradation and antibacterial activities
granting_institution	FACULTY OF RESOURCE SCIENCE & TECHNOLOGY, UNIVERSITI MALAYSIA SARAWAK
granting_department	CHEMISTRY
publishDate	2023
url	http://ir.unimas.my/id/eprint/43252/3/Feniellia%20Diwvya_dsva.pdf http://ir.unimas.my/id/eprint/43252/4/Thesis%20MSc._Feniellia%20Diwvya%20-24%20page.pdf http://ir.unimas.my/id/eprint/43252/5/Thesis%20MSc._Feniellia%20Diwvya.ftext.pdf
_version_	1783728553122070528

The Multifunctionalised TiO2/Ag/Cellulose Acetate Photocatalyst with Enhanced Photodegradation and Antibacterial Activities

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