Crystal Structure Parameter Analysis of Reduced Graphene Oxide (rGO) from Coconut Shell Charcoal

Utiya Hikmah; Aghea Tahta Wahyu Azizah; Erna Hastuti

doi:10.20527/flux.v21i2.17135

Crystal Structure Parameter Analysis of Reduced Graphene Oxide (rGO) from Coconut Shell Charcoal

Utiya Hikmah, Aghea Tahta Wahyu Azizah, Erna Hastuti

Abstract

In this research, reduced graphene oxide (rGO) material from coconut shell charcoal was synthesized using the modified Hummer method. The reduction process of Graphene Oxide (GO) to rGO uses the reducing agent L-Ascorbic Acid (LAA) and is assisted by microwave radiation. The samples obtained were then characterized using XRD to analyze the crystal structure parameters of the rGO samples obtained. Based on the XRD results, the data obtained was then analyzed using the Scherrer and modified Scherrer equations to determine the crystal size in the sample. In addition, the Williamson-Hall equation is also used to analyze crystal size and lattice strain. This article also analyzes XRD data using the Rietveld method using Rietica software. The output from the Rietica software obtained lattice parameter values a ≠ b ≠ c and angle α = β = γ = 90° which indicates an orthorhombic crystal lattice structure. In the refinement process, Rietica's software affects the suitability parameters in the form of R and GOF indicator values. The sample obtained was also measured for the electrical conductivity value of the rGO sample using an LCR meter.

Keywords

rGO; Scherrer; Williamson-Hall; Rietveld

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References

Yanti, D. R., Hikmah, U., Prasetyo, A., & Hastuti, E. (2020). The effect of microwave irradiation on reduced graphene oxide from coconut shells. In IOP Conference Series: Earth and Environmental Science (Vol. 456, No. 1, p. 012008). IOP Publishing.

Sumadiyasa, M., & Manuaba, I. B. S. (2018). Penentuan Ukuran Kristal Menggunakan Formula Scherrer, Williamson-Hull Plot, dan Ukuran Partikel dengan SEM Determining Crystallite Size Using Scherrer Formula, Williamson-Hull Plot, and Particle Size with SEM. Buletin Fisika, 28-35.

Warren, B., & Averbach, B. L. (1950). The effect of cold‐work distortion on X‐ray patterns. Journal of applied physics, 21(6), 595-599.

Sivasankaran, S., Sivaprasad, K., Narayanasamy, R., & Satyanarayana, P. V. (2011). X-ray peak broadening analysis of AA 6061100− x− x wt.% Al2O3 nanocomposite prepared by mechanical alloying. Materials Characterization, 62(7), 661-672.

Suryanarayana, C., & Norton, M. G. (1998). X-Ray diffraction a practical approach. (1. Press).

Mote, V. D., Purushotham, Y., & Dole, B. N. (2012). Williamson-Hall analysis in estimation of lattice strain in nanometer-sized ZnO particles. Journal of theoretical and applied physics, 6, 1-8.

Monshi, A., Foroughi, M. R., & Monshi, M. R. (2012). Modified Scherrer equation to estimate more accurately nano-crystallite size using XRD. World journal of nano science and engineering, 2(3), 154-160

Pratapa, S. (2004). Bahan Kuliah Difraksi Sinar-X. Jurusan Fisika FMIPA ITS. Surabaya.

Wahyuni, M. S., & Hastuti, E. (2010). Karakterisasi cangkang kerang menggunakan XRD dan X Ray PHYSICS Basic Unit. Jurnal Neutrino: Jurnal Fisika dan Aplikasinya.

Setiadji S, Nuryadin B, Ramadhan H, Sundari C, Sudiarti T, Supriadin A and Ivansyah A 2018. Preparation of reduced Graphene Oxide (rGO) assisted by microwave irradiation and hydrothermal for reduction methods. IOP Conference Series: Materials Science and Engineering, p 012079

DOI: http://dx.doi.org/10.20527/flux.v21i2.17135