Preparation and characterization of nanostructured barium oxide

It was found that the basic catalytic property of the metal oxide was increase with high surface area and nanosized particles. In this study, surface modified Barium oxide (BaO) was synthesized by hydration-dehydration method. Barium hydroxide ( Ba(OH)2) has prepared from Barium Peroxide (BaO2) whic...

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Main Author:	Abd. Rahim, Mashkurah
Format:	Thesis
Language:	English
Published:	2010
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/15358/9/MashkurahAbdRahimMFSA2010.pdf
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spelling	my-utm-ep.153582018-05-27T06:35:02Z Preparation and characterization of nanostructured barium oxide 2010-12 Abd. Rahim, Mashkurah QD Chemistry It was found that the basic catalytic property of the metal oxide was increase with high surface area and nanosized particles. In this study, surface modified Barium oxide (BaO) was synthesized by hydration-dehydration method. Barium hydroxide ( Ba(OH)2) has prepared from Barium Peroxide (BaO2) which acted as precursor. The Ba(OH)2 was calcined at a temperature of 50°C to 300°C under vacuum atmosphere of 10-3 mbar. Prepared samples were characterized using thermogravimetric-derivative thermogravimetry (TG-DTG), fourier-transform infrared (FTIR), X-ray powder diffraction (XRD), single point Brunauer-Emmet Teller (BET) surface area analysis and field emission scanning electron microscope (FESEM). The TG-DTG result shows that the major weight lost occurs at a temperature 110°C to 150°C which was 0.7%. This indicated the decomposition of barium hydroxide to barium oxide. The XRD diffractogram of BaO proved that Ba(OH)2 has been transformed to BaO in tetragonal formed as the temperature increases. The particle size for the surface modified barium oxide was calculated using Scherer’s equation and the resulting particle size was approximately 34 nm. Thus, the prepared surface modified BaO with nano size particles have been produced in this study. The amount of basic sites was investigated using the most fundamental chemical techniques of back titration and as the temperature increases from 150°C to 300°C, the basic sites increases from 0.67 to 1.67 mmol g-1 respectively. This is most probably due to the formation of more BaO with basic sites that occur during the activation process at temperature 300°C. The chemical properties of the prepared surface modified BaO were measured using electron spin resonance (ESR) method. Based on ESR study, a single peak g-value at 1.9830 was observed throughout the 30 minutes UV radiation and shown that only one site which active in electron trapping sites. 2010-12 Thesis http://eprints.utm.my/id/eprint/15358/ http://eprints.utm.my/id/eprint/15358/9/MashkurahAbdRahimMFSA2010.pdf application/pdf en public 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 Abd. Rahim, Mashkurah Preparation and characterization of nanostructured barium oxide
description	It was found that the basic catalytic property of the metal oxide was increase with high surface area and nanosized particles. In this study, surface modified Barium oxide (BaO) was synthesized by hydration-dehydration method. Barium hydroxide ( Ba(OH)2) has prepared from Barium Peroxide (BaO2) which acted as precursor. The Ba(OH)2 was calcined at a temperature of 50°C to 300°C under vacuum atmosphere of 10-3 mbar. Prepared samples were characterized using thermogravimetric-derivative thermogravimetry (TG-DTG), fourier-transform infrared (FTIR), X-ray powder diffraction (XRD), single point Brunauer-Emmet Teller (BET) surface area analysis and field emission scanning electron microscope (FESEM). The TG-DTG result shows that the major weight lost occurs at a temperature 110°C to 150°C which was 0.7%. This indicated the decomposition of barium hydroxide to barium oxide. The XRD diffractogram of BaO proved that Ba(OH)2 has been transformed to BaO in tetragonal formed as the temperature increases. The particle size for the surface modified barium oxide was calculated using Scherer’s equation and the resulting particle size was approximately 34 nm. Thus, the prepared surface modified BaO with nano size particles have been produced in this study. The amount of basic sites was investigated using the most fundamental chemical techniques of back titration and as the temperature increases from 150°C to 300°C, the basic sites increases from 0.67 to 1.67 mmol g-1 respectively. This is most probably due to the formation of more BaO with basic sites that occur during the activation process at temperature 300°C. The chemical properties of the prepared surface modified BaO were measured using electron spin resonance (ESR) method. Based on ESR study, a single peak g-value at 1.9830 was observed throughout the 30 minutes UV radiation and shown that only one site which active in electron trapping sites.
format	Thesis
qualification_level	Master's degree
author	Abd. Rahim, Mashkurah
author_facet	Abd. Rahim, Mashkurah
author_sort	Abd. Rahim, Mashkurah
title	Preparation and characterization of nanostructured barium oxide
title_short	Preparation and characterization of nanostructured barium oxide
title_full	Preparation and characterization of nanostructured barium oxide
title_fullStr	Preparation and characterization of nanostructured barium oxide
title_full_unstemmed	Preparation and characterization of nanostructured barium oxide
title_sort	preparation and characterization of nanostructured barium oxide
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2010
url	http://eprints.utm.my/id/eprint/15358/9/MashkurahAbdRahimMFSA2010.pdf
_version_	1747814994404179968

Preparation and characterization of nanostructured barium oxide

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