Understanding the structural properties of feasible chemically reduced graphene

Nur Ezyanie Safie; Mohd Asyadi Azam; Nur Ezyanie Safie; Mohd Asyadi Azam

doi:10.3934/matersci.2022037

AIMS Materials Science

2022, Volume 9, Issue 4: 617-627. doi: 10.3934/matersci.2022037

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Research article

Understanding the structural properties of feasible chemically reduced graphene

Nur Ezyanie Safie ,
Mohd Asyadi Azam ^,

Fakulti Kejuruteraan Pembuatan, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia

Received: 12 May 2022 Revised: 06 July 2022 Accepted: 17 July 2022 Published: 08 August 2022

The production of pristine graphene materials for industrialization, often limited by the complicated synthesis route, has introduced other graphene derivatives with a workable and facile synthesis route, especially for mass production. For the chemical exfoliation process, the synthesis involves oxidants and reducing agents to exfoliate the graphene layer from the 3D graphite and remove excess oxygen-containing functional groups yielding graphene-like materials known as reduced graphene oxide (rGO). This work feasibly produces rGO with nanoplatelet morphology through the green solution-processable method. Upon reduction, the crystallite size for the a-axis (L_a) is more prominent (22.50 Å) than the crystallite size for the c-axis (L_c) (11.50 Å), suggesting the nanoplatelets structure of the end product, which is also confirmed by the morphology. The integrated intensity (I_D/I_G) ratio and average defect density (n_D) of as-prepared rGO confirmed the sp² restoration in the graphitic structure. Overall, the Raman and X-ray diffraction (XRD) characterization parameters validate the production of rGO nanoplatelets, especially with four graphene layers per domain, suggesting that high-quality rGO are achievable and ready to be implemented for the large-scale production.
- reduced graphene oxide,
- exfoliated graphene,
- feasible method,
- green route production,
- structural properties
Citation: Nur Ezyanie Safie, Mohd Asyadi Azam. Understanding the structural properties of feasible chemically reduced graphene[J]. AIMS Materials Science, 2022, 9(4): 617-627. doi: 10.3934/matersci.2022037

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Abstract

The production of pristine graphene materials for industrialization, often limited by the complicated synthesis route, has introduced other graphene derivatives with a workable and facile synthesis route, especially for mass production. For the chemical exfoliation process, the synthesis involves oxidants and reducing agents to exfoliate the graphene layer from the 3D graphite and remove excess oxygen-containing functional groups yielding graphene-like materials known as reduced graphene oxide (rGO). This work feasibly produces rGO with nanoplatelet morphology through the green solution-processable method. Upon reduction, the crystallite size for the a-axis (L_a) is more prominent (22.50 Å) than the crystallite size for the c-axis (L_c) (11.50 Å), suggesting the nanoplatelets structure of the end product, which is also confirmed by the morphology. The integrated intensity (I_D/I_G) ratio and average defect density (n_D) of as-prepared rGO confirmed the sp² restoration in the graphitic structure. Overall, the Raman and X-ray diffraction (XRD) characterization parameters validate the production of rGO nanoplatelets, especially with four graphene layers per domain, suggesting that high-quality rGO are achievable and ready to be implemented for the large-scale production.

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