Friction stir welding using rice husk on aluminium 6061

Friction stir welding using rice husk on aluminium 6061

Conventional synthesized silver nanoparticles (AgNP) often correlated with harmful chemicals and by-products, consumed large amount of energy and involved complex procedure. Therefore, green synthesis of AgNP which offers eco-friendly and cost-effective method in synthesizing AgNP was proposed. This...

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Main Author: Jajuli, Sarah Syafiqah
Format: Thesis
Language:English
Published: 2021
Subjects:
Q Science (General)
Online Access:http://eprints.utm.my/id/eprint/101800/1/SarahSyafiqahJajuliMFS2021.pdf.pdf
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spelling my-utm-ep.1018002023-07-10T09:29:56Z Friction stir welding using rice husk on aluminium 6061 2021 Jajuli, Sarah Syafiqah Q Science (General) Conventional synthesized silver nanoparticles (AgNP) often correlated with harmful chemicals and by-products, consumed large amount of energy and involved complex procedure. Therefore, green synthesis of AgNP which offers eco-friendly and cost-effective method in synthesizing AgNP was proposed. This study used banana peel extract (BPE) and pineapple peel extract (PPE) as a reducing agent and stabilizer, and silver nitrate (AgNO3) as a metal salt precursor. Volume of peel extracts, concentration of AgNO3, reaction temperature and incubation time were optimized and the AgNP were characterized. The optimum conditions to produce BPE-AgNP and PPE-AgNP were successfully investigated. Total Phenolic Compound (TPC) analysis showed that BPE has higher phenols content than PPE which is 14.671 mgGAE/g and 8.479 mgGAE/g respectively. Visible spectrum displayed surface plasmon resonance (SPR) peak at 430 nm and 450 nm for BPE-AgNP and PPE-AgNP respectively. X-ray diffraction (XRD) displayed both BPE-AgNP and PPE-AgNP has face centered cubic crystalline nature. FESEM micrograph revealed both BPE-AgNP and PPE-AgNP are almost spherical with the particles size of 30.99 ± 9.47 nm and 21.6 ± 7.01 nm respectively. Energy dispersive X-ray spectroscopy (EDX) analysis showed the highest peak at 3 KeV which is in silver region, confirming the presence of elemental silver. Fourier transform infrared spectroscopy (FTIR) analysis confirmed the functional group responsible as reducing agent in the transformation of Ag+ to Ag0 and resulted to the stabilization of AgNP structure. BPE-AgNP and PPE-AgNP showed good potential as a catalyst for methylene blue (MB) and methyl orange (MO) decolorization. Decolorization kinetics observation indicated MB decolorization was best fitted to first order and intraparticle diffusion model for BPE-AgNP and pseudo first order model for PPE-AgNP. Meanwhile, MO decolorization was best fitted to pseudo-second order model for both BPE-AgNP and PPE-AgNP. 2021 Thesis http://eprints.utm.my/id/eprint/101800/ http://eprints.utm.my/id/eprint/101800/1/SarahSyafiqahJajuliMFS2021.pdf.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:146280 masters Universiti Teknologi Malaysia Faculty of Science
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic Q Science (General)
spellingShingle Q Science (General)
Jajuli, Sarah Syafiqah
Friction stir welding using rice husk on aluminium 6061
description Conventional synthesized silver nanoparticles (AgNP) often correlated with harmful chemicals and by-products, consumed large amount of energy and involved complex procedure. Therefore, green synthesis of AgNP which offers eco-friendly and cost-effective method in synthesizing AgNP was proposed. This study used banana peel extract (BPE) and pineapple peel extract (PPE) as a reducing agent and stabilizer, and silver nitrate (AgNO3) as a metal salt precursor. Volume of peel extracts, concentration of AgNO3, reaction temperature and incubation time were optimized and the AgNP were characterized. The optimum conditions to produce BPE-AgNP and PPE-AgNP were successfully investigated. Total Phenolic Compound (TPC) analysis showed that BPE has higher phenols content than PPE which is 14.671 mgGAE/g and 8.479 mgGAE/g respectively. Visible spectrum displayed surface plasmon resonance (SPR) peak at 430 nm and 450 nm for BPE-AgNP and PPE-AgNP respectively. X-ray diffraction (XRD) displayed both BPE-AgNP and PPE-AgNP has face centered cubic crystalline nature. FESEM micrograph revealed both BPE-AgNP and PPE-AgNP are almost spherical with the particles size of 30.99 ± 9.47 nm and 21.6 ± 7.01 nm respectively. Energy dispersive X-ray spectroscopy (EDX) analysis showed the highest peak at 3 KeV which is in silver region, confirming the presence of elemental silver. Fourier transform infrared spectroscopy (FTIR) analysis confirmed the functional group responsible as reducing agent in the transformation of Ag+ to Ag0 and resulted to the stabilization of AgNP structure. BPE-AgNP and PPE-AgNP showed good potential as a catalyst for methylene blue (MB) and methyl orange (MO) decolorization. Decolorization kinetics observation indicated MB decolorization was best fitted to first order and intraparticle diffusion model for BPE-AgNP and pseudo first order model for PPE-AgNP. Meanwhile, MO decolorization was best fitted to pseudo-second order model for both BPE-AgNP and PPE-AgNP.
format Thesis
qualification_level Master's degree
author Jajuli, Sarah Syafiqah
author_facet Jajuli, Sarah Syafiqah
author_sort Jajuli, Sarah Syafiqah
title Friction stir welding using rice husk on aluminium 6061
title_short Friction stir welding using rice husk on aluminium 6061
title_full Friction stir welding using rice husk on aluminium 6061
title_fullStr Friction stir welding using rice husk on aluminium 6061
title_full_unstemmed Friction stir welding using rice husk on aluminium 6061
title_sort friction stir welding using rice husk on aluminium 6061
granting_institution Universiti Teknologi Malaysia
granting_department Faculty of Science
publishDate 2021
url http://eprints.utm.my/id/eprint/101800/1/SarahSyafiqahJajuliMFS2021.pdf.pdf
_version_ 1776100774599720960

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