Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application

Titanium dioxide (TiO2) is the most widely used photocatalyst and has been applied for water and air purification and disinfection of microorganism. Anatase structured TiO2 is a wide bandgap (3.2 eV) semiconductor which, under UV light, is able to degrade chemicals and cell components of microorgani...

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Main Authors:	Mohd Daud, Farah Diana, Sopyan, Lis, Mel, Maizirwan
Format:	Conference or Workshop Item
Language:	English
Published:	2010
Subjects:	TP155 Chemical engineering
Online Access:	http://irep.iium.edu.my/4929/ http://irep.iium.edu.my/4929/ http://irep.iium.edu.my/4929/1/PS097_%28Farah_paper%29.pdf

id	iium-4929
recordtype	eprints
spelling	iium-49292016-04-28T07:31:06Z http://irep.iium.edu.my/4929/ Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application Mohd Daud, Farah Diana Sopyan, Lis Mel, Maizirwan TP155 Chemical engineering Titanium dioxide (TiO2) is the most widely used photocatalyst and has been applied for water and air purification and disinfection of microorganism. Anatase structured TiO2 is a wide bandgap (3.2 eV) semiconductor which, under UV light, is able to degrade chemicals and cell components of microorganisms. In this study, TiO2 nanopowder photocatalyst was synthesized by sol-gel process using a titanium chelate compound, titanium (di-isopropoxide) bis(acetylacetonate) (PTP) as the precursor. The precursor was hydrolyzed under an acidic catalyst condition, followed by reflux for 15 minutes and 1 hour. The precipitate powder obtained after filtration was calcined at 400°C. XRD analysis confirmed that the TiO2 powders A (15 minutes reflux) and B (1 hour reflux) have strongest peak at 25° which indicates anatase crystal structure. The particle size of powder A was smaller than the Powder B as proved by calculation using Scherrer’s equation. The crystallization temperature of TiO2 powder A was higher due to its smaller particles that needed more heat to crystallize than powder B as confirmed by TG/DTA. FESEM analysis showed powder A have homogenous spherical shape, contrast to powder B showing inhomogenous spherical shape and connected particle. The TiO2 photocatalyst activity in killing bacteria was investigated for 5 hours by varying the concentration of TiO2 and UV light intensity. 2010 Conference or Workshop Item NonPeerReviewed application/pdf en http://irep.iium.edu.my/4929/1/PS097_%28Farah_paper%29.pdf Mohd Daud, Farah Diana and Sopyan, Lis and Mel, Maizirwan (2010) Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application. In: 19th Scientific Conference of Electron Microscopy Society of Malaysia (EMSM), 14-16 December 2010, Langkawi, Malaysia. (In Press) http://www.sirim.my/emsm2010/
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TP155 Chemical engineering
spellingShingle	TP155 Chemical engineering Mohd Daud, Farah Diana Sopyan, Lis Mel, Maizirwan Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application
description	Titanium dioxide (TiO2) is the most widely used photocatalyst and has been applied for water and air purification and disinfection of microorganism. Anatase structured TiO2 is a wide bandgap (3.2 eV) semiconductor which, under UV light, is able to degrade chemicals and cell components of microorganisms. In this study, TiO2 nanopowder photocatalyst was synthesized by sol-gel process using a titanium chelate compound, titanium (di-isopropoxide) bis(acetylacetonate) (PTP) as the precursor. The precursor was hydrolyzed under an acidic catalyst condition, followed by reflux for 15 minutes and 1 hour. The precipitate powder obtained after filtration was calcined at 400°C. XRD analysis confirmed that the TiO2 powders A (15 minutes reflux) and B (1 hour reflux) have strongest peak at 25° which indicates anatase crystal structure. The particle size of powder A was smaller than the Powder B as proved by calculation using Scherrer’s equation. The crystallization temperature of TiO2 powder A was higher due to its smaller particles that needed more heat to crystallize than powder B as confirmed by TG/DTA. FESEM analysis showed powder A have homogenous spherical shape, contrast to powder B showing inhomogenous spherical shape and connected particle. The TiO2 photocatalyst activity in killing bacteria was investigated for 5 hours by varying the concentration of TiO2 and UV light intensity.
format	Conference or Workshop Item
author	Mohd Daud, Farah Diana Sopyan, Lis Mel, Maizirwan
author_facet	Mohd Daud, Farah Diana Sopyan, Lis Mel, Maizirwan
author_sort	Mohd Daud, Farah Diana
title	Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application
title_short	Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application
title_full	Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application
title_fullStr	Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application
title_full_unstemmed	Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application
title_sort	synthesis of tio2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application
publishDate	2010
url	http://irep.iium.edu.my/4929/ http://irep.iium.edu.my/4929/ http://irep.iium.edu.my/4929/1/PS097_%28Farah_paper%29.pdf
first_indexed	2023-09-18T20:13:21Z
last_indexed	2023-09-18T20:13:21Z
_version_	1777407624503885824

Synthesis of TiO2 nanosized powder photocatalyst via soft-gel method for bacteria inactivation application

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