Tuning the optical bandgap of multi-walled carbon nanotube-modified zinc silicate glass-ceramic composites

Chan, Kar Fei; Zaid, Mohd Hafiz Mohd; Liza, Shahira; Mamat, Shuhazlly; Endot, Nor Azam; Tanemura, Masaki; Yaakob, Yazid

doi:10.1016/j.ceramint.2021.04.017

Cited by 8 publications

(3 citation statements)

References 55 publications

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“…For Fe 3 O 4 /MWCNT, the direct band gap was found to be 2.69 eV, which is lower than the reported direct band gap of 3.9 eV for pure Fe 3 O 4 prepared using ammonia solution precipitation [41] . The presence of MWCNT in Fe 3 O 4 /MWCNT contributes to this lower band gap, as MWCNT has been shown to have a band gap‐reducing effect on composite materials [42,43] . Furthermore, the band gap of FMZP0, a combination of Fe 3 O 4 /MWCNT/ZnO, was measured to be 2.80 eV.…”

Section: Resultsmentioning

confidence: 61%

“…[41] The presence of MWCNT in Fe 3 O 4 /MWCNT contributes to this lower band gap, as MWCNT has been shown to have a band gap-reducing effect on composite materials. [42,43] Furthermore, the band gap of FMZP0, a combination of Fe 3 O 4 /MWCNT/ZnO, was measured to be 2.80 eV. This value is slightly higher than the band gap of Fe 3 O 4 /MWCNT but lower than that of pure ZnO nanoparticles, which is approximately 3.26 eV.…”

Section: Formation Mechanismmentioning

confidence: 99%

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A Facile Route Preparation of Fe₃O₄/MWCNT/ZnO/PANI Nanocomposite and its Characterization for Enhanced Microwave Absorption Properties

Prima Hardianto,

Nur Iman,

Hidayat

et al. 2024

ChemistrySelect

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With increasing concerns regarding the potential health risks associated with microwave‐based technology, researchers have been actively investigating materials with impressive microwave absorption properties. In this study, a synthesis and investigation of a nanocomposite, named Fe3O4/MWCNT/ZnO/PANI, consisting of magnetite (Fe3O4), multi‐walled carbon nanotube (MWCNT), zinc oxide (ZnO), and polyaniline (PANI) as a microwave‐absorbing material, was carried out for the first time. The nanocomposite was prepared through a simple physical mixing approach and demonstrated tunable microwave absorption, making it highly suitable for shielding applications. Structural analysis techniques, including X‐ray diffraction (XRD), Fourier‐transform infrared spectroscopy (FTIR), and scanning electron microscopy with energy‐dispersive X‐ray analysis (SEM‐EDAX), confirmed the presence of all components in the nanocomposite. Moreover, ultraviolet‐visible spectroscopy (UV‐Vis) further verified the formation of nanocomposite components and revealed an adjustable optical bandgap ranging from 2.86 to 3.34 eV. Impressively, the nanocomposite exhibited promising microwave absorption properties, with a minimum reflection loss (RL) of −32.66 dB for the nanocomposite containing 37.50 % PANI by weight, and a maximum electromagnetic bandwidth (EB) of 2.26 GHz for the nanocomposite containing 44.44 % PANI by weight, indicating its potential as an effective shielding material. Furthermore, a modified theory combining transmission line, Landau‐Lifshits, and Drude‐Lorentz theories was introduced to extract complex relative permittivity and permeability, providing insights into the role of polyaniline in enhancing the microwave absorption properties of the nanocomposite as measured by reflection loss (RL).

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Section: Resultsmentioning

confidence: 61%

Section: Formation Mechanismmentioning

confidence: 99%

A Facile Route Preparation of Fe₃O₄/MWCNT/ZnO/PANI Nanocomposite and its Characterization for Enhanced Microwave Absorption Properties

Prima Hardianto,

Nur Iman,

Hidayat

et al. 2024

ChemistrySelect

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“…Fabrications of CNTs and graphene have been rapidly gaining attention for various potentials in photonic, electronic, energy and mechanical applications, as they exhibit excellent mechanical, electrical and chemical properties [ 23 , 24 ]. As a case in point, multi-walled CNTs can be utilized as fillers in the development of ceramics and polymer composites, with enhanced optical and mechanical properties [ 25 , 26 ]. Furthermore, multi-walled CNTs also have been employed for scanning probes on micro-scope tips, bio-sensors and field emission devices in industrial applications [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Waste NR Latex Based-Precursors as Carbon Source for CNTs Eco-Fabrications

et al. 2021

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In this work, the potential of utilizing a waste latex-based precursor (i.e., natural rubber glove (NRG)) as a carbon source for carbon nanotube (CNT) fabrication via chemical vapor deposition has been demonstrated. Gas chromatography-mass spectroscopy (GC-MS) analysis reveals that the separation of the lightweight hydrocarbon chain from the heavier long chain differs in hydrocarbon contents in the NRG fraction (NRG-L). Both solid NRG (NRG-S) and NRG-L samples contain >63% carbon, <0.6% sulfur and <0.08% nitrogen content, respectively, as per carbon-nitrogen-sulfur (CNS) analysis. Growth of CNTs on the samples was confirmed by Raman spectra, SEM and TEM images, whereby it was shown that NRG-S is better than NRG-L in terms of synthesized CNTs yield percentage with similar quality. The optimum vaporization and reaction temperatures were 350 and 800 °C, respectively, considering the balance of good yield percentage (26.7%) and quality of CNTs (ID/IG = 0.84 ± 0.08, diameter ≈ 122 nm) produced. Thus, utilization of waste NRG as a candidate for carbon feedstock to produce value-added CNTs products could be a significant approach for eco-technology.

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Effects of ZBS addition on crystallization, microstructure and dielectric properties of low temperature co-fired Mg2SiO4-CaTiO3 ceramics

Tang

Zhang³

et al. 2023

J Electroceram

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Tuning the optical bandgap of multi-walled carbon nanotube-modified zinc silicate glass-ceramic composites

Cited by 8 publications

References 55 publications

A Facile Route Preparation of Fe₃O₄/MWCNT/ZnO/PANI Nanocomposite and its Characterization for Enhanced Microwave Absorption Properties

A Facile Route Preparation of Fe₃O₄/MWCNT/ZnO/PANI Nanocomposite and its Characterization for Enhanced Microwave Absorption Properties

Waste NR Latex Based-Precursors as Carbon Source for CNTs Eco-Fabrications

Effects of ZBS addition on crystallization, microstructure and dielectric properties of low temperature co-fired Mg2SiO4-CaTiO3 ceramics

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Tuning the optical bandgap of multi-walled carbon nanotube-modified zinc silicate glass-ceramic composites

Cited by 8 publications

References 55 publications

A Facile Route Preparation of Fe3O4/MWCNT/ZnO/PANI Nanocomposite and its Characterization for Enhanced Microwave Absorption Properties

A Facile Route Preparation of Fe3O4/MWCNT/ZnO/PANI Nanocomposite and its Characterization for Enhanced Microwave Absorption Properties

Waste NR Latex Based-Precursors as Carbon Source for CNTs Eco-Fabrications

Effects of ZBS addition on crystallization, microstructure and dielectric properties of low temperature co-fired Mg2SiO4-CaTiO3 ceramics

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Product

Resources

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A Facile Route Preparation of Fe₃O₄/MWCNT/ZnO/PANI Nanocomposite and its Characterization for Enhanced Microwave Absorption Properties

A Facile Route Preparation of Fe₃O₄/MWCNT/ZnO/PANI Nanocomposite and its Characterization for Enhanced Microwave Absorption Properties