Synthesis of TiO2 nanosized powder photocatalyst via sol-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, Iis, Sopyan, Mel, Maizirwan
Format:	Article
Language:	English
Published:	Universiti Putra Malaysia 2011
Subjects:	Q Science (General) QD Chemistry TA164 Bioengineering TA401 Materials of engineering and construction
Online Access:	http://irep.iium.edu.my/46419/ http://irep.iium.edu.my/46419/ http://irep.iium.edu.my/46419/1/Farah_Diana_paper_master_Malaysian_Journal_of_Microscopy_2011.pdf

id	iium-46419
recordtype	eprints
spelling	iium-464192016-07-19T07:36:01Z http://irep.iium.edu.my/46419/ Synthesis of TiO2 nanosized powder photocatalyst via sol-gel method for bacteria inactivation application Mohd Daud, Farah Diana Iis, Sopyan Mel, Maizirwan Q Science (General) QD Chemistry TA164 Bioengineering TA401 Materials of engineering and construction 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. Universiti Putra Malaysia 2011 Article PeerReviewed application/pdf en http://irep.iium.edu.my/46419/1/Farah_Diana_paper_master_Malaysian_Journal_of_Microscopy_2011.pdf Mohd Daud, Farah Diana and Iis, Sopyan and Mel, Maizirwan (2011) Synthesis of TiO2 nanosized powder photocatalyst via sol-gel method for bacteria inactivation application. Malaysian Journal of Microscopy, 7. pp. 161-169. ISSN 1823-7010 http://www.msm.org.my/index.php/microscopy-journal/323-malaysian-journal-of-microscopy-volume-7
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	Q Science (General) QD Chemistry TA164 Bioengineering TA401 Materials of engineering and construction
spellingShingle	Q Science (General) QD Chemistry TA164 Bioengineering TA401 Materials of engineering and construction Mohd Daud, Farah Diana Iis, Sopyan Mel, Maizirwan Synthesis of TiO2 nanosized powder photocatalyst via sol-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	Article
author	Mohd Daud, Farah Diana Iis, Sopyan Mel, Maizirwan
author_facet	Mohd Daud, Farah Diana Iis, Sopyan Mel, Maizirwan
author_sort	Mohd Daud, Farah Diana
title	Synthesis of TiO2 nanosized powder photocatalyst via sol-gel method for bacteria inactivation application
title_short	Synthesis of TiO2 nanosized powder photocatalyst via sol-gel method for bacteria inactivation application
title_full	Synthesis of TiO2 nanosized powder photocatalyst via sol-gel method for bacteria inactivation application
title_fullStr	Synthesis of TiO2 nanosized powder photocatalyst via sol-gel method for bacteria inactivation application
title_full_unstemmed	Synthesis of TiO2 nanosized powder photocatalyst via sol-gel method for bacteria inactivation application
title_sort	synthesis of tio2 nanosized powder photocatalyst via sol-gel method for bacteria inactivation application
publisher	Universiti Putra Malaysia
publishDate	2011
url	http://irep.iium.edu.my/46419/ http://irep.iium.edu.my/46419/ http://irep.iium.edu.my/46419/1/Farah_Diana_paper_master_Malaysian_Journal_of_Microscopy_2011.pdf
first_indexed	2023-09-18T21:06:05Z
last_indexed	2023-09-18T21:06:05Z
_version_	1777410942491951104

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

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