Preparation And Characterization Of Supported Gold Nanoparticles And Their Catalytic Studies In The Reduction Of P-Nitrophenol

Gold (Au) nanoparticles supported on titania (TiO2), alumina (Al2O3) and zinc oxide (ZnO) were prepared by the deposition-precipitation (DP) method using gold (III) chloride trihydrate, HAuCl4.3H2O as the precursor. The effect of pH on Au loadings, particle size and particle size distribution in...

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Main Author:	Yazid, Hanani
Format:	Thesis
Language:	English
Published:	2010
Subjects:	QD1-999 Chemistry
Online Access:	http://eprints.usm.my/41637/1/HANANI_BINTI_YAZID_HJ.pdf
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id	my-usm-ep.41637
record_format	uketd_dc
spelling	my-usm-ep.416372019-04-12T05:26:52Z Preparation And Characterization Of Supported Gold Nanoparticles And Their Catalytic Studies In The Reduction Of P-Nitrophenol 2010-05 Yazid, Hanani QD1-999 Chemistry Gold (Au) nanoparticles supported on titania (TiO2), alumina (Al2O3) and zinc oxide (ZnO) were prepared by the deposition-precipitation (DP) method using gold (III) chloride trihydrate, HAuCl4.3H2O as the precursor. The effect of pH on Au loadings, particle size and particle size distribution in the preparation of the gold nanoparticles were studied at pH below and above the isoelectric points (IEP) of the metal oxide supports. The effects of adjusting pH before and after the addition of the support into the gold precursor solution were also investigated. Structural and elemental characterizations of the supported gold nanoparticles were carried out using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-rays (EDX), atomic absorption spectrometry (AAS), ultraviolet-visible spectroscopy (UV-Vis) and Brunauer, Emmett and Teller (BET) adsorption method. The results revealed the dependency of Au particles size on the gold precursor species present at the pH of the preparation. The Au particle size obtained range between 4 - 8 nm. The Au/ZnO system produced the smallest Au particles size (4.32 ± 1.26 nm). The effect of pH adjustment furthermore emphasized the crucial of pHt (pH after the addition of support to the gold precursor solution) in determining the types of gold complexes deposited on the support. The final pH (pHf) showed a more pronounced effect in terms of the total Au loadings in the sample. 2010-05 Thesis http://eprints.usm.my/41637/ http://eprints.usm.my/41637/1/HANANI_BINTI_YAZID_HJ.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QD1-999 Chemistry
spellingShingle	QD1-999 Chemistry Yazid, Hanani Preparation And Characterization Of Supported Gold Nanoparticles And Their Catalytic Studies In The Reduction Of P-Nitrophenol
description	Gold (Au) nanoparticles supported on titania (TiO2), alumina (Al2O3) and zinc oxide (ZnO) were prepared by the deposition-precipitation (DP) method using gold (III) chloride trihydrate, HAuCl4.3H2O as the precursor. The effect of pH on Au loadings, particle size and particle size distribution in the preparation of the gold nanoparticles were studied at pH below and above the isoelectric points (IEP) of the metal oxide supports. The effects of adjusting pH before and after the addition of the support into the gold precursor solution were also investigated. Structural and elemental characterizations of the supported gold nanoparticles were carried out using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-rays (EDX), atomic absorption spectrometry (AAS), ultraviolet-visible spectroscopy (UV-Vis) and Brunauer, Emmett and Teller (BET) adsorption method. The results revealed the dependency of Au particles size on the gold precursor species present at the pH of the preparation. The Au particle size obtained range between 4 - 8 nm. The Au/ZnO system produced the smallest Au particles size (4.32 ± 1.26 nm). The effect of pH adjustment furthermore emphasized the crucial of pHt (pH after the addition of support to the gold precursor solution) in determining the types of gold complexes deposited on the support. The final pH (pHf) showed a more pronounced effect in terms of the total Au loadings in the sample.
format	Thesis
qualification_level	Master's degree
author	Yazid, Hanani
author_facet	Yazid, Hanani
author_sort	Yazid, Hanani
title	Preparation And Characterization Of Supported Gold Nanoparticles And Their Catalytic Studies In The Reduction Of P-Nitrophenol
title_short	Preparation And Characterization Of Supported Gold Nanoparticles And Their Catalytic Studies In The Reduction Of P-Nitrophenol
title_full	Preparation And Characterization Of Supported Gold Nanoparticles And Their Catalytic Studies In The Reduction Of P-Nitrophenol
title_fullStr	Preparation And Characterization Of Supported Gold Nanoparticles And Their Catalytic Studies In The Reduction Of P-Nitrophenol
title_full_unstemmed	Preparation And Characterization Of Supported Gold Nanoparticles And Their Catalytic Studies In The Reduction Of P-Nitrophenol
title_sort	preparation and characterization of supported gold nanoparticles and their catalytic studies in the reduction of p-nitrophenol
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kimia
publishDate	2010
url	http://eprints.usm.my/41637/1/HANANI_BINTI_YAZID_HJ.pdf
_version_	1747820946083807232

Preparation And Characterization Of Supported Gold Nanoparticles And Their Catalytic Studies In The Reduction Of P-Nitrophenol

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