Vanadium oxides doped porous titania photocatalyst for phenol photodegradation

Two series of new porous photocatalysts of vanadium oxides (1 - 5 wt%) doped porous TiO2 using tetrabutyl titanate (TBT) and titanium tetraisopropoxide (TTIP) as Ti precursor were successfully synthesized. The photocatalysts were synthesized via sol-gel method using cetyltrimethylammonium bromide (C...

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Main Author:	Khaw, Swee Por
Format:	Thesis
Language:	English
Published:	2016
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/78123/1/KhawSweePorMFS2016.pdf
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spelling	my-utm-ep.781232018-07-25T07:57:33Z Vanadium oxides doped porous titania photocatalyst for phenol photodegradation 2016-01 Khaw, Swee Por QD Chemistry Two series of new porous photocatalysts of vanadium oxides (1 - 5 wt%) doped porous TiO2 using tetrabutyl titanate (TBT) and titanium tetraisopropoxide (TTIP) as Ti precursor were successfully synthesized. The photocatalysts were synthesized via sol-gel method using cetyltrimethylammonium bromide (CTAB) as template. X-ray diffraction analysis showed that all the photocatalysts crystallined in anatase phase. There was no CTAB residue in the photocatalyst synthesized after calcination at 773 K. According to diffused reflectance UV-visible spectroscopy analysis, the band gap energy reduced from 3.02 (in TBT-TiO2) to 2.72 eV (in 5V-TBT-p-TiO2) for TiO2 synthesized using TBT as Ti precursor. Similarly, reduction in band gap energy from 3.11 (in TTIP-TiO2) to 2.66 eV (in 5V-TTIP-p-TiO2) for TiO2 synthesized using TTIP as Ti precursor. The nitrogen adsorption-desorption analysis revealed that the surface area of both series increased with the amount of dopant. These materials contained of disorder mesopores with particle size range of 5 – 56 nm. The photocatalytic testing results showed that samples 4V-TBT-p-TiO2 and 4V-TTIP-p-TiO2 recorded the highest percentage of phenol degradation under visible light irradiation in their respective series. Sample 4V-TBT-p-TiO2 photodegraded 62.2% phenol, while 4V-TTIP-p-TiO2 photodegraded 62.8% phenol after 7 h reaction time. There was no significant difference between the photodegradation performances of two series of vanadium oxide doped TiO2. 2016-01 Thesis http://eprints.utm.my/id/eprint/78123/ http://eprints.utm.my/id/eprint/78123/1/KhawSweePorMFS2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:94263 masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Khaw, Swee Por Vanadium oxides doped porous titania photocatalyst for phenol photodegradation
description	Two series of new porous photocatalysts of vanadium oxides (1 - 5 wt%) doped porous TiO2 using tetrabutyl titanate (TBT) and titanium tetraisopropoxide (TTIP) as Ti precursor were successfully synthesized. The photocatalysts were synthesized via sol-gel method using cetyltrimethylammonium bromide (CTAB) as template. X-ray diffraction analysis showed that all the photocatalysts crystallined in anatase phase. There was no CTAB residue in the photocatalyst synthesized after calcination at 773 K. According to diffused reflectance UV-visible spectroscopy analysis, the band gap energy reduced from 3.02 (in TBT-TiO2) to 2.72 eV (in 5V-TBT-p-TiO2) for TiO2 synthesized using TBT as Ti precursor. Similarly, reduction in band gap energy from 3.11 (in TTIP-TiO2) to 2.66 eV (in 5V-TTIP-p-TiO2) for TiO2 synthesized using TTIP as Ti precursor. The nitrogen adsorption-desorption analysis revealed that the surface area of both series increased with the amount of dopant. These materials contained of disorder mesopores with particle size range of 5 – 56 nm. The photocatalytic testing results showed that samples 4V-TBT-p-TiO2 and 4V-TTIP-p-TiO2 recorded the highest percentage of phenol degradation under visible light irradiation in their respective series. Sample 4V-TBT-p-TiO2 photodegraded 62.2% phenol, while 4V-TTIP-p-TiO2 photodegraded 62.8% phenol after 7 h reaction time. There was no significant difference between the photodegradation performances of two series of vanadium oxide doped TiO2.
format	Thesis
qualification_level	Master's degree
author	Khaw, Swee Por
author_facet	Khaw, Swee Por
author_sort	Khaw, Swee Por
title	Vanadium oxides doped porous titania photocatalyst for phenol photodegradation
title_short	Vanadium oxides doped porous titania photocatalyst for phenol photodegradation
title_full	Vanadium oxides doped porous titania photocatalyst for phenol photodegradation
title_fullStr	Vanadium oxides doped porous titania photocatalyst for phenol photodegradation
title_full_unstemmed	Vanadium oxides doped porous titania photocatalyst for phenol photodegradation
title_sort	vanadium oxides doped porous titania photocatalyst for phenol photodegradation
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2016
url	http://eprints.utm.my/id/eprint/78123/1/KhawSweePorMFS2016.pdf
_version_	1747817912618450944

Vanadium oxides doped porous titania photocatalyst for phenol photodegradation

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