Crystal structure parameter analysis of Reduced Graphene Oxide (rGO) from coconut shell charcoal

Utiya, Hikmah, Azizah, Aghea Tahta Wahyu and Erna, Hastuti (2024) Crystal structure parameter analysis of Reduced Graphene Oxide (rGO) from coconut shell charcoal. Crystal Structure Parameter Analysis of Reduced Graphene Oxide (rGO) from Coconut Shell Charcoal, 21 (2). pp. 157-162. ISSN 1819-796X (p-ISSN); 2541-1713 (e-ISSN)

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Abstract

In this study, rGO (reduced graphene oxide) synthesis is carried out using coconut shell charcoal as raw material. The synthesis method that is used is a modified Hummer method. The process of turning graphene oxide (GO) into reduced graphene oxide (rGO) uses L-ascorbic acid (LAA) and is assisted by microwave radiation. The obtained sample was then characterized by using X-ray Diffraction (XRD) for further investigation. The results of the XRD analysis are then analyzed to determine the crystal structure parameters in the sample, which include crystal size, lattice strain, and crystal structure. The data analysis used in this study included the Scherrer equation, modified Scherrer equation, and Williamson-Hall equation. This research also analyses XRD data using the Rietveld method and Rietica software. The results of the analysis using Rietica indicate that the rGO samples that are obtained have an ortorombik crystal structure with lattice parameter values a ≠ b ≠ c and angle α = β = γ = 90°. In the refinement process, Rietica's software affects the suitability parameters in the form of Profile R-factor (Rp) and Goodness of Fit (GOF) indicator values. The sample obtained was also measured for the electrical conductivity value of the rGO sample using an LCR meter. The electrical conductivity of the rGO sample without microwave radiation was 1.66x10- 8 S/cm, while the rGO sample with microwave exposure for 40 minutes was 3.89x10-8 S/cm.

Item Type:	Journal Article
Keywords:	rGO; Scherrer; Williamson-Hall; Rietveld
Subjects:	02 PHYSICAL SCIENCES > 0204 Condensed Matter Physics > 020406 Surfaces and Structural Properties of Condensed Matter 02 PHYSICAL SCIENCES > 0204 Condensed Matter Physics 02 PHYSICAL SCIENCES > 0299 Other Physical Sciences
Divisions:	Faculty of Mathematics and Sciences > Department of Physics
Depositing User:	Utiya Hikmah
Date Deposited:	19 Aug 2024 21:08

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