Synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / Mohd Rafal Sahudin

In this work, graphene oxide (GO) was successfully synthesized with the optimization formulation obtained using 1g of graphite, 3g of potassium permanganate (KMnO4), 25 mL of sulfuric acid (H2SO4), 5 mL of hydrogen peroxide (H2O2) with 20°C of reaction temperatures and 3 hours of reaction time. The...

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Main Author:	Sahudin, Mohd Rafal
Format:	Thesis
Language:	English
Published:	2022
Subjects:	Fiber optics
Online Access:	https://ir.uitm.edu.my/id/eprint/75388/1/75388.pdf
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spelling	my-uitm-ir.753882023-03-28T07:36:39Z Synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / Mohd Rafal Sahudin 2022 Sahudin, Mohd Rafal Fiber optics In this work, graphene oxide (GO) was successfully synthesized with the optimization formulation obtained using 1g of graphite, 3g of potassium permanganate (KMnO4), 25 mL of sulfuric acid (H2SO4), 5 mL of hydrogen peroxide (H2O2) with 20°C of reaction temperatures and 3 hours of reaction time. The AuNPs were successfully synthesized with the optimum condition using 0.254 mM of gold chloride (HAuCl4) and 40 mM of trisodium citrate (NaCt). The composite structure of AuNPs embedded to GO (GOAuNPs) was performed by direct mixing of GO solution to AuNPs solution at various volume ratios (1:05, 1:1, 1:2.5, 1:5, 1:7.5, 1:10 and 1:15). Then, fabrication of GO, AuNPs, and composite GO-AuNPs (at various volume ratios) encapsulated optical fibre probes was performed via dipping process for 24 hours with the aid of vortex mixing. The detection using indoor air exposed the highest light intensity signal on the fibre optic sensor generated from the GO-AuNPs-based sensor at a volume ratio of 1:5 and 1:10. For spectral analysis, the highest CO2 detection was detected by fibre optic sensors with GO-AuNPs (1:5) as a coating material with 62.7% signal improvement from uncoated sensor probe, 26.4% higher than the signal from GO-coated and 33.9% better than AuNPs-coated sensor. The highest N2 detection was obtained by the sensor fabricated of GO-AuNPs (1:10) with the signal enhancement of 59.8% from uncoated probe sensors. 2022 Thesis https://ir.uitm.edu.my/id/eprint/75388/ https://ir.uitm.edu.my/id/eprint/75388/1/75388.pdf text en public masters Universiti Teknologi MARA (UiTM) College of Engineering Makhsin, Siti Rabizah
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Makhsin, Siti Rabizah
topic	Fiber optics
spellingShingle	Fiber optics Sahudin, Mohd Rafal Synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / Mohd Rafal Sahudin
description	In this work, graphene oxide (GO) was successfully synthesized with the optimization formulation obtained using 1g of graphite, 3g of potassium permanganate (KMnO4), 25 mL of sulfuric acid (H2SO4), 5 mL of hydrogen peroxide (H2O2) with 20°C of reaction temperatures and 3 hours of reaction time. The AuNPs were successfully synthesized with the optimum condition using 0.254 mM of gold chloride (HAuCl4) and 40 mM of trisodium citrate (NaCt). The composite structure of AuNPs embedded to GO (GOAuNPs) was performed by direct mixing of GO solution to AuNPs solution at various volume ratios (1:05, 1:1, 1:2.5, 1:5, 1:7.5, 1:10 and 1:15). Then, fabrication of GO, AuNPs, and composite GO-AuNPs (at various volume ratios) encapsulated optical fibre probes was performed via dipping process for 24 hours with the aid of vortex mixing. The detection using indoor air exposed the highest light intensity signal on the fibre optic sensor generated from the GO-AuNPs-based sensor at a volume ratio of 1:5 and 1:10. For spectral analysis, the highest CO2 detection was detected by fibre optic sensors with GO-AuNPs (1:5) as a coating material with 62.7% signal improvement from uncoated sensor probe, 26.4% higher than the signal from GO-coated and 33.9% better than AuNPs-coated sensor. The highest N2 detection was obtained by the sensor fabricated of GO-AuNPs (1:10) with the signal enhancement of 59.8% from uncoated probe sensors.
format	Thesis
qualification_level	Master's degree
author	Sahudin, Mohd Rafal
author_facet	Sahudin, Mohd Rafal
author_sort	Sahudin, Mohd Rafal
title	Synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / Mohd Rafal Sahudin
title_short	Synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / Mohd Rafal Sahudin
title_full	Synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / Mohd Rafal Sahudin
title_fullStr	Synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / Mohd Rafal Sahudin
title_full_unstemmed	Synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / Mohd Rafal Sahudin
title_sort	synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / mohd rafal sahudin
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	College of Engineering
publishDate	2022
url	https://ir.uitm.edu.my/id/eprint/75388/1/75388.pdf
_version_	1783736050606145536

Synthesis of gold nanoparticles embedded graphene oxide for fibre optic gas sensor applications / Mohd Rafal Sahudin

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