Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles

Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles

<p>This study aimed to improve the optical properties of reduced graphene oxide- and carbon</p><p>nanotubes-coated tellurite glass doped with erbium oxide nanoparticles denoted as</p><p>ZBTEr(NPs)-rGO and ZBTEr(NPs)-CNTs. Two sets...

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Main Author: Azlina Yahya
Format: thesis
Language:eng
Published: 2023
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QC Physics
Online Access:https://ir.upsi.edu.my/detailsg.php?det=10513
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institution Universiti Pendidikan Sultan Idris
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topic QC Physics
spellingShingle QC Physics
Azlina Yahya
Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles
description <p>This study aimed to improve the optical properties of reduced graphene oxide- and carbon</p><p>nanotubes-coated tellurite glass doped with erbium oxide nanoparticles denoted as</p><p>ZBTEr(NPs)-rGO and ZBTEr(NPs)-CNTs. Two sets of glass series were synthesized by</p><p>melt-quenched technique with chemical composition of (0.47(1-y))TeO2+(0.2(1-</p><p>y))B2O3+(0.29(1-y))+ZnO+Er2O3(y) wherein, y = 0.005, 0.01, 0.02, 0.03, 0.04, and 0.05</p><p>mol% Er2O3 nanoparticles. Tellurite-based glass was deposited with rGO and CNTs onto</p><p>the glass surfaces by spray-coated technique. The physical, morphological, structural, and</p><p>optical properties of ZBTEr(NPs)-rGO and ZBTEr(NPS)-CNTs glasses were characterized</p><p>via densimeter, scanning electron microscopy (SEM), energy dispersive X-ray (EDX),</p><p>transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transforminfrared</p><p>(FT-IR), micro-Raman spectroscopy, ultraviolet-visible (UV-Vis)</p><p>spectrophotometer, and photoluminescence. SEM micrographs revealed morphological</p><p>structures of rGO and CNTs on the glass surfaces meanwhile, EDX spectra disclosed</p><p>elemental composition of rGO and CNTs. TEM images proved existence of Er(NPs) with</p><p>average size (~23.53 nm) in glass matrix. XRD pattern verified amorphous nature of</p><p>glasses. FT-IR spectra evaluated the presence of non-bridging oxygens (NBOs) with TeO4,</p><p>TeO3, and BO3 functional groups meanwhile, Raman spectra demonstrated good quality of</p><p>rGO and CNTs. The refractive index value was increased (2.402-2.775) for ZBTEr(NPs)-</p><p>rGO meanwhile, (2.432-2.542) for ZBTEr(NPs)-CNTs. The optical bandgap energy value</p><p>was improved (1.913-2.931 eV) for ZBTEr(NPs)-rGO and (2.513-2.875 eV) ZBTEr(NPs)-</p><p>CNTs meanwhile, non-linear trend of Urbach energy (0.118-0.408 eV) for ZBTEr(NPs)-</p><p>rGO and (0.158-0.375 eV) for ZBTEr(NPs)-CNTs. Judd-Ofelts intensity parameters</p><p>showed 2>6>4 trend for ZBTEr(NPs)-rGO whilst, 2>4>6 trend for ZBTEr(NPs)-</p><p>CNTs. Radiative parameters and branching ratio proved 2H11/24I15/2 transition showed</p><p>highest radiative transition value, resulting in a strong green emission. Luminescence</p><p>spectra exhibited two emission peaks assigned to 2H11/24I15/2 and 4S3/24I15/2 transitions.</p><p>In conclusion, the rGO and CNTs deposition enhanced the optical properties of glass</p><p>materials. Implication of this study offers a new milestone in the glass coatings field for</p><p>improving current fiber optics.</p>
format thesis
qualification_name
qualification_level Doctorate
author Azlina Yahya
author_facet Azlina Yahya
author_sort Azlina Yahya
title Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles
title_short Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles
title_full Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles
title_fullStr Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles
title_full_unstemmed Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles
title_sort structural, intensity parameters and luminescence analysis of rgo-/cnts-coated tellurite glass doped with erbium nanoparticles
granting_institution Universiti Pendidikan Sultan Idris
granting_department Fakulti Sains dan Matematik
publishDate 2023
url https://ir.upsi.edu.my/detailsg.php?det=10513
_version_ 1804890564647190528
spelling oai:ir.upsi.edu.my:105132024-06-25 Structural, intensity parameters and luminescence analysis of rGO-/CNTs-Coated tellurite glass doped with erbium nanoparticles 2023 Azlina Yahya QC Physics <p>This study aimed to improve the optical properties of reduced graphene oxide- and carbon</p><p>nanotubes-coated tellurite glass doped with erbium oxide nanoparticles denoted as</p><p>ZBTEr(NPs)-rGO and ZBTEr(NPs)-CNTs. Two sets of glass series were synthesized by</p><p>melt-quenched technique with chemical composition of (0.47(1-y))TeO2+(0.2(1-</p><p>y))B2O3+(0.29(1-y))+ZnO+Er2O3(y) wherein, y = 0.005, 0.01, 0.02, 0.03, 0.04, and 0.05</p><p>mol% Er2O3 nanoparticles. Tellurite-based glass was deposited with rGO and CNTs onto</p><p>the glass surfaces by spray-coated technique. The physical, morphological, structural, and</p><p>optical properties of ZBTEr(NPs)-rGO and ZBTEr(NPS)-CNTs glasses were characterized</p><p>via densimeter, scanning electron microscopy (SEM), energy dispersive X-ray (EDX),</p><p>transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transforminfrared</p><p>(FT-IR), micro-Raman spectroscopy, ultraviolet-visible (UV-Vis)</p><p>spectrophotometer, and photoluminescence. SEM micrographs revealed morphological</p><p>structures of rGO and CNTs on the glass surfaces meanwhile, EDX spectra disclosed</p><p>elemental composition of rGO and CNTs. TEM images proved existence of Er(NPs) with</p><p>average size (~23.53 nm) in glass matrix. XRD pattern verified amorphous nature of</p><p>glasses. FT-IR spectra evaluated the presence of non-bridging oxygens (NBOs) with TeO4,</p><p>TeO3, and BO3 functional groups meanwhile, Raman spectra demonstrated good quality of</p><p>rGO and CNTs. The refractive index value was increased (2.402-2.775) for ZBTEr(NPs)-</p><p>rGO meanwhile, (2.432-2.542) for ZBTEr(NPs)-CNTs. The optical bandgap energy value</p><p>was improved (1.913-2.931 eV) for ZBTEr(NPs)-rGO and (2.513-2.875 eV) ZBTEr(NPs)-</p><p>CNTs meanwhile, non-linear trend of Urbach energy (0.118-0.408 eV) for ZBTEr(NPs)-</p><p>rGO and (0.158-0.375 eV) for ZBTEr(NPs)-CNTs. Judd-Ofelts intensity parameters</p><p>showed 2>6>4 trend for ZBTEr(NPs)-rGO whilst, 2>4>6 trend for ZBTEr(NPs)-</p><p>CNTs. Radiative parameters and branching ratio proved 2H11/24I15/2 transition showed</p><p>highest radiative transition value, resulting in a strong green emission. Luminescence</p><p>spectra exhibited two emission peaks assigned to 2H11/24I15/2 and 4S3/24I15/2 transitions.</p><p>In conclusion, the rGO and CNTs deposition enhanced the optical properties of glass</p><p>materials. Implication of this study offers a new milestone in the glass coatings field for</p><p>improving current fiber optics.</p> 2023 thesis https://ir.upsi.edu.my/detailsg.php?det=10513 https://ir.upsi.edu.my/detailsg.php?det=10513 text eng closedAccess Doctoral Universiti Pendidikan Sultan Idris Fakulti Sains dan Matematik <p>Aarts, L., Jaeqx, S., Ende, B. M. Van Der, & Meijerink, A. (2011). Downconversion for the Er3+, Yb3+ couple in KPb2Cl A low-phonon frequency host. Journal of Luminescence, 131, 608613.</p><p></p><p>Abdel-Baki, M., & El-Diasty, F. (2007). Optical properties of oxide glasses containing transition metals : Case of titanium- and chromium-containing glasses. Current Opinion in Solid State and Materials Science, 10(56), 217229.</p><p></p><p>Abid, Sehrawat, P., Islam, S. S., Mishra, P., & Ahmad, S. (2018). Reduced graphene oxide (rGO) based wideband optical sensor and the role of Temperature , Defect States and Quantum Efficiency. 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