Effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique

The effect of urea in the preparation of MoO3 supported on activated carbon (AC) was studied. The experiment was performed by using microwave-induced technique. The bamboo-based activated carbon was used as the supportive material of MoO3. It was prepared via chemical activation using phosphoric aci...

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Main Author:	Megat Nu’Man, Puteri Raihanah
Format:	Thesis
Language:	English
Published:	2014
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/51405/25/PuteriRaihanahMegatMFS2014.pdf
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spelling	my-utm-ep.514052020-07-13T02:31:52Z Effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique 2014-09 Megat Nu’Man, Puteri Raihanah QD Chemistry The effect of urea in the preparation of MoO3 supported on activated carbon (AC) was studied. The experiment was performed by using microwave-induced technique. The bamboo-based activated carbon was used as the supportive material of MoO3. It was prepared via chemical activation using phosphoric acid as an activating agent and carbonized at 400 ?C. Meanwhile, urea was selected as an additive to enhance the formation of MoO3 because of its ability to extract Mo ion from the starting material ammonium heptamolybdate (AHM). The concentrations of urea to AHM were varied to see their effect to the formation of supported-MoO3. Urea was first added to the precursor solution and mixed homogenously before AC was introduced to the reaction media. After that, the mixture was treated under microwave radiation at 800 W for 2 minutes. The AC samples were characterized using BET surface area, Fourier transformed infrared spectroscopy and scanning electron microscope (SEM). Meanwhile, the supported-MoO3 samples were characterized by X-ray diffraction and BET surface area analysis. The BET surface area obtained for AC and C supported-MoO3 was 954.38 m2/g and 79.59 m2/g, respectively. The diffractogram obtained demonstrated the existence of orthorhombic a-MoO3 and C material. After comparison, sample with 1:1 molar ratio of Mo/urea was selected as the optimum ratio to produce the supported-MoO3. Higher concentration of urea led to the formation of amorphous MoO3 and C. As conclusion, with the equal ratio to the Mo precursor solution, urea can be used as an additive in order to enhance the formation of supported-MoO3. The surface area of supported-MoO3 can be enhanced by using activated carbon as supportive material. Finally, the reaction can be well performed using microwave radiation as a greener and faster source of energy. 2014-09 Thesis http://eprints.utm.my/id/eprint/51405/ http://eprints.utm.my/id/eprint/51405/25/PuteriRaihanahMegatMFS2014.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:86726 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 Megat Nu’Man, Puteri Raihanah Effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique
description	The effect of urea in the preparation of MoO3 supported on activated carbon (AC) was studied. The experiment was performed by using microwave-induced technique. The bamboo-based activated carbon was used as the supportive material of MoO3. It was prepared via chemical activation using phosphoric acid as an activating agent and carbonized at 400 ?C. Meanwhile, urea was selected as an additive to enhance the formation of MoO3 because of its ability to extract Mo ion from the starting material ammonium heptamolybdate (AHM). The concentrations of urea to AHM were varied to see their effect to the formation of supported-MoO3. Urea was first added to the precursor solution and mixed homogenously before AC was introduced to the reaction media. After that, the mixture was treated under microwave radiation at 800 W for 2 minutes. The AC samples were characterized using BET surface area, Fourier transformed infrared spectroscopy and scanning electron microscope (SEM). Meanwhile, the supported-MoO3 samples were characterized by X-ray diffraction and BET surface area analysis. The BET surface area obtained for AC and C supported-MoO3 was 954.38 m2/g and 79.59 m2/g, respectively. The diffractogram obtained demonstrated the existence of orthorhombic a-MoO3 and C material. After comparison, sample with 1:1 molar ratio of Mo/urea was selected as the optimum ratio to produce the supported-MoO3. Higher concentration of urea led to the formation of amorphous MoO3 and C. As conclusion, with the equal ratio to the Mo precursor solution, urea can be used as an additive in order to enhance the formation of supported-MoO3. The surface area of supported-MoO3 can be enhanced by using activated carbon as supportive material. Finally, the reaction can be well performed using microwave radiation as a greener and faster source of energy.
format	Thesis
qualification_level	Master's degree
author	Megat Nu’Man, Puteri Raihanah
author_facet	Megat Nu’Man, Puteri Raihanah
author_sort	Megat Nu’Man, Puteri Raihanah
title	Effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique
title_short	Effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique
title_full	Effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique
title_fullStr	Effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique
title_full_unstemmed	Effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique
title_sort	effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2014
url	http://eprints.utm.my/id/eprint/51405/25/PuteriRaihanahMegatMFS2014.pdf
_version_	1747817547402575872

Effects of urea in the preparation of supported-molybdenum trioxide via microwave induced technique

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