Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential

Barium hexaferrite embedded-silica-titania photocatalyst (TiO2-SiO2-BaFe12O19) was synthesized through sol-gel, liquid catalytic phase transformation and solid reaction routes. The magnetic photocatalyst was aimed to harvest the photoenergy from the sunlight, minimize the electron-holes recombinatio...

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Main Authors:	Azrina, Abd Aziz, Shaliza, Ibrahim, Pichiah, Saravanan
Format:	Article
Language:	English English
Published:	Trans Tech Publications, Switzerland 2015
Subjects:	TD Environmental technology. Sanitary engineering
Online Access:	http://umpir.ump.edu.my/id/eprint/17886/ http://umpir.ump.edu.my/id/eprint/17886/ http://umpir.ump.edu.my/id/eprint/17886/ http://umpir.ump.edu.my/id/eprint/17886/1/MSF.819.226.pdf http://umpir.ump.edu.my/id/eprint/17886/7/ftech-2015-azrina-Nanocrystal%20TiO2%20Engulfed%20SiO2-Barium%20Hexaferrite1.pdf

id	ump-17886
recordtype	eprints
spelling	ump-178862017-11-22T07:54:37Z http://umpir.ump.edu.my/id/eprint/17886/ Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential Azrina, Abd Aziz Shaliza, Ibrahim Pichiah, Saravanan TD Environmental technology. Sanitary engineering Barium hexaferrite embedded-silica-titania photocatalyst (TiO2-SiO2-BaFe12O19) was synthesized through sol-gel, liquid catalytic phase transformation and solid reaction routes. The magnetic photocatalyst was aimed to harvest the photoenergy from the sunlight, minimize the electron-holes recombination rate, improve the long lifetime charge-carriers transfer to maximize the photocatalytic activity and enhances the separation and reusability of it. The as-synthesized photocatalyst was characterized and the photocatalytic activity was evaluated for the reduction of 2, 4-dichlorophenol (2, 4-DCP) under direct sunlight. The presence of SiO2 interlayer in TiO2-SiO2-BaFe12O19 prevents the phase transformation of magnetic core. TiO2-SiO2-BaFe12O19 benefits the magnetic separation with appreciable magnitude of coercivity (5035.6 Oe) and saturation magnetization (18.8256E-3 emu/g), respectively. The ferrite ions from the magnetic core which dispersed into TiO2 matrix exhibited an evident shift of the absorption in the visible region. This was again confirmed with the reduced band gap energy of 1.90 eV. Furthermore, TiO2-SiO2-BaFe12O19 destructed 100% of 2, 4-DCP compound within 150 min under very bright sunlight with an average irradiance of 820.8 W/m2 (results not shown). The embedding of BaFe12O19 with a SiO2 layer onto TiO2 nanocrystals contributed for an excellent solar-light utilization and ease magnetic separation of the nanosized photocatalyst. Trans Tech Publications, Switzerland 2015 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/17886/1/MSF.819.226.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/17886/7/ftech-2015-azrina-Nanocrystal%20TiO2%20Engulfed%20SiO2-Barium%20Hexaferrite1.pdf Azrina, Abd Aziz and Shaliza, Ibrahim and Pichiah, Saravanan (2015) Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential. Materials Science Forum, 819. pp. 226-231. ISSN 1662-9752 http://dx.doi.org/10.4028/www.scientific.net/MSF.819.226 doi:10.4028/www.scientific.net/MSF.819.226
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TD Environmental technology. Sanitary engineering
spellingShingle	TD Environmental technology. Sanitary engineering Azrina, Abd Aziz Shaliza, Ibrahim Pichiah, Saravanan Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential
description	Barium hexaferrite embedded-silica-titania photocatalyst (TiO2-SiO2-BaFe12O19) was synthesized through sol-gel, liquid catalytic phase transformation and solid reaction routes. The magnetic photocatalyst was aimed to harvest the photoenergy from the sunlight, minimize the electron-holes recombination rate, improve the long lifetime charge-carriers transfer to maximize the photocatalytic activity and enhances the separation and reusability of it. The as-synthesized photocatalyst was characterized and the photocatalytic activity was evaluated for the reduction of 2, 4-dichlorophenol (2, 4-DCP) under direct sunlight. The presence of SiO2 interlayer in TiO2-SiO2-BaFe12O19 prevents the phase transformation of magnetic core. TiO2-SiO2-BaFe12O19 benefits the magnetic separation with appreciable magnitude of coercivity (5035.6 Oe) and saturation magnetization (18.8256E-3 emu/g), respectively. The ferrite ions from the magnetic core which dispersed into TiO2 matrix exhibited an evident shift of the absorption in the visible region. This was again confirmed with the reduced band gap energy of 1.90 eV. Furthermore, TiO2-SiO2-BaFe12O19 destructed 100% of 2, 4-DCP compound within 150 min under very bright sunlight with an average irradiance of 820.8 W/m2 (results not shown). The embedding of BaFe12O19 with a SiO2 layer onto TiO2 nanocrystals contributed for an excellent solar-light utilization and ease magnetic separation of the nanosized photocatalyst.
format	Article
author	Azrina, Abd Aziz Shaliza, Ibrahim Pichiah, Saravanan
author_facet	Azrina, Abd Aziz Shaliza, Ibrahim Pichiah, Saravanan
author_sort	Azrina, Abd Aziz
title	Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential
title_short	Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential
title_full	Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential
title_fullStr	Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential
title_full_unstemmed	Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential
title_sort	nanocrystal tio2 engulfed sio2-barium hexaferrite for enhanced electrons mobility and solar harvesting potential
publisher	Trans Tech Publications, Switzerland
publishDate	2015
url	http://umpir.ump.edu.my/id/eprint/17886/ http://umpir.ump.edu.my/id/eprint/17886/ http://umpir.ump.edu.my/id/eprint/17886/ http://umpir.ump.edu.my/id/eprint/17886/1/MSF.819.226.pdf http://umpir.ump.edu.my/id/eprint/17886/7/ftech-2015-azrina-Nanocrystal%20TiO2%20Engulfed%20SiO2-Barium%20Hexaferrite1.pdf
first_indexed	2023-09-18T22:24:59Z
last_indexed	2023-09-18T22:24:59Z
_version_	1777415906325954560

Nanocrystal TiO2 Engulfed SiO2-Barium Hexaferrite for Enhanced Electrons Mobility and Solar Harvesting Potential

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