Sains Malaysiana 52(1)(2023): 261-269

http://doi.org/10.17576/jsm-2023-5201-21

Optical Properties of Reduced Graphene Oxide-Coated Tellurite Glass Doped at Different Erbium Composition

(Sifat Optik Kaca Telurit Bersalut Graphene Oksida Terkurang Didop pada Komposisi Erbium Berbeza)

AZLINA YAHYA, MUHAMMAD NOORAZLAN ABD AZIS^* & SURIANI ABU BAKAR

Physics Department, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900 Tanjung Malim, Perak Darul Ridzuan, Malaysia

Received: 31 May 2022/Accepted: 11 October 2022

Abstract

Graphene-based nanomaterials have significant potential to be used as coating materials for glass performance. In this work, reduced graphene oxide (rGO)-coated tellurite glass was synthesized via melt-quenching and low-cost spray coating techniques for improving the optical properties in the glassy matrix. The structural properties investigated using X-Ray Diffraction (XRD) confirmed the structural arrangement of an amorphous nature phase meanwhile, Scanning Electron Microscopy (SEM) analysis proved the morphological structure images of rGO onto the tellurite glass surface. The refractive index value of rGO-coated glass was found higher in the range of 2.402 - 2.775 due to the graphene-based effects. The optical bandgap energy value of rGO-coated glass was improved from 1.913 - 2.980 eV which correlated to the changes in rGO absorption characteristics. The Urbach energy showed a high number of defects in absorption with the presence of rGO structures. By virtue of improved optical properties, the rGO-coated glass may be beneficial to be used as a glass coating material for high optical performance of fiber optics.

Keywords: Erbium nanoparticles; rGO; tellurite glass

Abstrak

Bahan nano berasaskan grafin mempunyai potensi ketara untuk digunakan sebagai bahan salutan untuk prestasi kaca. Dalam kajian ini, kaca tellurit disalut grafin oksida terkurang (rGO) telah disintesis melalui teknik lebur lindap dan salutan semburan kos rendah untuk meningkatkan sifat optik dalam kaca matriks. Sifat struktur yang dijalankan menggunakan pembelauan sinar-X (XRD) mengesahkan susunan struktur fasa sifat amorfus manakala, analisis mikroskop pengimbasan elektron (SEM) membuktikan imej struktur morfologi rGO pada permukaan kaca tellurit. Nilai indeks biasan kaca disaluti rGO didapati lebih tinggi dalam julat 2.402 - 2.775 disebabkan oleh kesan berasaskan grafin. Nilai tenaga jurang jalur optik kaca disaluti rGO telah meningkat dari 1.913 - 2.980 eV yang dikaitkan dengan perubahan dalam ciri penyerapan rGO. Tenaga Urbach menunjukkan bilangan kekurangan yang tinggi dalam penyerapan dengan kehadiran struktur rGO. Berdasarkan sifat optik yang dipertingkatkan, kaca disaluti rGO bermanfaat untuk digunakan sebagai bahan salutan kaca untuk prestasi tinggi gentian optik.

Kata kunci: Kaca telurit; nanozarah erbium; rGO

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^*Corresponding author; email: azlanmn@fsmt.upsi.edu.my