Biosynthesis of silver nanoparticles-eggshell nanocomposite using Garcinia Mangostana L. Leaf extract and its application for the reduction of 4-nitrophenol

In recent years, metal nanoparticles have attracted wide attention due to their attractive properties and interesting applications. In particular, the catalytic properties of silver nanoparticles (Ag NPs) are of interest to many researchers because of their high reactivity. This study reported the s...

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Main Author:	Mohd. Tubillah, Norfarahim
Format:	Thesis
Language:	English
Published:	2020
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/101903/1/NorfarahimMohdTubillahMFS2020.pdf
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id	my-utm-ep.101903
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spelling	my-utm-ep.1019032023-07-22T03:23:33Z Biosynthesis of silver nanoparticles-eggshell nanocomposite using Garcinia Mangostana L. Leaf extract and its application for the reduction of 4-nitrophenol 2020 Mohd. Tubillah, Norfarahim QD Chemistry In recent years, metal nanoparticles have attracted wide attention due to their attractive properties and interesting applications. In particular, the catalytic properties of silver nanoparticles (Ag NPs) are of interest to many researchers because of their high reactivity. This study reported the synthesis of Ag NPs using Garcinia mangostana L. leaf extract as reducing and stabilizing agent. The biosynthesized Ag NPs were then immobilized on the surface of eggshell powder. The formation of Ag NPs were confirmed by the presence of absorption peak at 450 nm and the bioreduction reaction was completed within 4 h as monitored by ultraviolet-violet (UV-Vis) spectroscopy. The Fourier transform infrared spectroscopy (FTIR) analysis on the Garcinia mangostana L. leaf extract revealed the presence of -OH functional groups that were involved in the reduction and stabilizing of Ag NPs. Energy dispersive X-ray (EDX) analysis on the AgNPs/eggshell nanocomposite showed the presence of Ag peaks that indicated the successful immobilization of Ag on the eggshell powder. The X-ray diffraction (XRD) analytical data on the nanocomposite showed a series of diffraction peaks that are consistent with crystalline CaCO3 from the eggshell and metallic Ag. From TEM images, Ag NPs were mostly of spherical shape with a mean diameter of 14.6 nm. The synthesised AgNPs/eggshell nanocomposite was tested as catalyst for the reduction of 4-nitrophenol to 4-aminophenol in the presence of sodium borohydride at room temperature. The highest activity was observed for the AgNPs/eggshell nanocomposite with Ag loading of 6 wt% and 4-nitrophenol with concentration of 0.03 mM. Under these optimum conditions, the 4-nitrophenol reduction showed good reproducibility where the average rate of reaction is 0.1478 min-1 while the average percentage of reduction calculated is 98.49%. From the recyclability test, the AgNPs/eggshell nanocomposite gave a slight decreased in catalytic activity within three catalytic cycles due to mass loss. 2020 Thesis http://eprints.utm.my/id/eprint/101903/ http://eprints.utm.my/id/eprint/101903/1/NorfarahimMohdTubillahMFS2020.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:146249 masters Universiti Teknologi Malaysia Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Mohd. Tubillah, Norfarahim Biosynthesis of silver nanoparticles-eggshell nanocomposite using Garcinia Mangostana L. Leaf extract and its application for the reduction of 4-nitrophenol
description	In recent years, metal nanoparticles have attracted wide attention due to their attractive properties and interesting applications. In particular, the catalytic properties of silver nanoparticles (Ag NPs) are of interest to many researchers because of their high reactivity. This study reported the synthesis of Ag NPs using Garcinia mangostana L. leaf extract as reducing and stabilizing agent. The biosynthesized Ag NPs were then immobilized on the surface of eggshell powder. The formation of Ag NPs were confirmed by the presence of absorption peak at 450 nm and the bioreduction reaction was completed within 4 h as monitored by ultraviolet-violet (UV-Vis) spectroscopy. The Fourier transform infrared spectroscopy (FTIR) analysis on the Garcinia mangostana L. leaf extract revealed the presence of -OH functional groups that were involved in the reduction and stabilizing of Ag NPs. Energy dispersive X-ray (EDX) analysis on the AgNPs/eggshell nanocomposite showed the presence of Ag peaks that indicated the successful immobilization of Ag on the eggshell powder. The X-ray diffraction (XRD) analytical data on the nanocomposite showed a series of diffraction peaks that are consistent with crystalline CaCO3 from the eggshell and metallic Ag. From TEM images, Ag NPs were mostly of spherical shape with a mean diameter of 14.6 nm. The synthesised AgNPs/eggshell nanocomposite was tested as catalyst for the reduction of 4-nitrophenol to 4-aminophenol in the presence of sodium borohydride at room temperature. The highest activity was observed for the AgNPs/eggshell nanocomposite with Ag loading of 6 wt% and 4-nitrophenol with concentration of 0.03 mM. Under these optimum conditions, the 4-nitrophenol reduction showed good reproducibility where the average rate of reaction is 0.1478 min-1 while the average percentage of reduction calculated is 98.49%. From the recyclability test, the AgNPs/eggshell nanocomposite gave a slight decreased in catalytic activity within three catalytic cycles due to mass loss.
format	Thesis
qualification_level	Master's degree
author	Mohd. Tubillah, Norfarahim
author_facet	Mohd. Tubillah, Norfarahim
author_sort	Mohd. Tubillah, Norfarahim
title	Biosynthesis of silver nanoparticles-eggshell nanocomposite using Garcinia Mangostana L. Leaf extract and its application for the reduction of 4-nitrophenol
title_short	Biosynthesis of silver nanoparticles-eggshell nanocomposite using Garcinia Mangostana L. Leaf extract and its application for the reduction of 4-nitrophenol
title_full	Biosynthesis of silver nanoparticles-eggshell nanocomposite using Garcinia Mangostana L. Leaf extract and its application for the reduction of 4-nitrophenol
title_fullStr	Biosynthesis of silver nanoparticles-eggshell nanocomposite using Garcinia Mangostana L. Leaf extract and its application for the reduction of 4-nitrophenol
title_full_unstemmed	Biosynthesis of silver nanoparticles-eggshell nanocomposite using Garcinia Mangostana L. Leaf extract and its application for the reduction of 4-nitrophenol
title_sort	biosynthesis of silver nanoparticles-eggshell nanocomposite using garcinia mangostana l. leaf extract and its application for the reduction of 4-nitrophenol
granting_institution	Universiti Teknologi Malaysia
granting_department	Faculty of Science
publishDate	2020
url	http://eprints.utm.my/id/eprint/101903/1/NorfarahimMohdTubillahMFS2020.pdf
_version_	1776100799326191616

Biosynthesis of silver nanoparticles-eggshell nanocomposite using Garcinia Mangostana L. Leaf extract and its application for the reduction of 4-nitrophenol

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