Synthesis and Raman characterization of wood sawdust ash, and wood sawdust ash-derived graphene

Severo, Lisiane S.; Rodrigues, Juliana Bürger; Campanelli, Dionathan Alves; Pereira, Vinícius M.; Menezes, J. W.; Menezes, Eliana Weber de; Valsecchi, Chiara; Vasconcellos, M.A.Z.; Armas, Luis Enrique Gomez

doi:10.1016/j.diamond.2021.108496

Cited by 15 publications

(8 citation statements)

References 27 publications

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“…The graphitization of biomass has been previously investigated in the literature. Graphenic materials were previously obtained from a wide range of biomass, such as woody biomass 20 – 23 , agricultural 24 – 35 or food wastes 36 , 37 , insects 36 , 38 , 39 or sewage sludges 37 , 40 . These studies showed a poor organization of the graphenic materials even with high temperatures treatments (> 2000 °C).…”

Section: Introductionmentioning

confidence: 99%

Calcium as an innovative and effective catalyst for the synthesis of graphene-like materials from cellulose

Beguerie

Weiss-Hortala

Nzihou

2022

Sci Rep

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Pyrolysis of lignocellulosic biomass (hard carbon) produces poorly graphitic biochar. In this study, nano-structured biochars were produced from microcrystalline cellulose using calcium as a non-conventional catalyst. Calcium is abundant, environmental-friendly and widely accessible. Graphitization of calcium-impregnated cellulose was carried out at 1800 °C, a temperature below 2000 °C where the graphitization usually occurs. XRD, Raman spectroscopy, high-resolution TEM together with the in-house numerical tool developed enable the quantification of the graphene fringes in the biochars. The non-impregnated cellulose biochar was composed of short and poorly stacked graphene fringes. The impregnation with 2 wt.% of calcium led to the conversion of the initial structure into a well-organized and less defective graphene-like one. The graphene-like structures obtained were composed of tens of stacked graphene fringes with a crystallite size up to 20 nm and an average interlayer spacing equal to 0.345 nm, close to the reference value of standard hexagonal graphite (0.3354 nm). The increase of the calcium concentration did not significantly improve the crystallite sizes of the graphene-like materials but rather drastically improved their rate. Our results propose a mechanism and provide new insights on the synthesis of graphene-like materials from bio-feedstocks using calcium where the literature is focused on transition metals such as iron and nickel among others. The decrease of the graphitization temperature below 2000 °C should lower the production cost as well as the environmental impact of the thermal graphene-like materials synthesis using biomass. This finding should stimulate further research in the field and broaden the application perspectives.

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Section: Introductionmentioning

confidence: 99%

Calcium as an innovative and effective catalyst for the synthesis of graphene-like materials from cellulose

Beguerie

Weiss-Hortala

Nzihou

2022

Sci Rep

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“…In order to verify the number of graphene layers the integrated intensity ratio I2D/IG was calculated, finding the value of ~0.6. It is well known that, for free-defect graphene, the I2D/IG is dependent on the number of graphene layers [21]. The ratio I2D/IG ∼ 2-3.5 is for monolayer graphene, 1 < I2D/IG <2 for bilayer graphene and I2D/IG < 1 for few layers graphene (FL) as shonw on Fig.…”

Section: Samples Specificationsmentioning

confidence: 85%

Characterization of Dielectric Properties of Graphene and Graphite Using the Resonant Cavity in 5G Test Band

Pereira

Hardt

Fantineli

et al. 2023

J. Microw. Optoelectron. Electromagn. Appl.

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“…Biomass conversion for green graphene synthesis is an ecologically conscious methodology that harnesses renewable organic materials to produce graphene and related materials while minimizing environmental harm, representing a significant stride towards eco-sustainable nanomaterial manufacturing. The process begins with the meticulous selection of appropriate biomass sources, 8 often including wood 9 (Fig. 3), agricultural residues (such as rice husks, 10 cornstalks, 11 or sugarcane bagasse 12 ), and algae.…”

Section: Green Graphene: Synthesis and Applicability In Eco-sustainab...mentioning

confidence: 99%

Point-of-care devices engaging green graphene: an eco-conscious and sustainable paradigm

Sengupta,

Hussain

2024

Nanoscale

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Synthesis and Raman characterization of wood sawdust ash, and wood sawdust ash-derived graphene

Cited by 15 publications

References 27 publications

Calcium as an innovative and effective catalyst for the synthesis of graphene-like materials from cellulose

Calcium as an innovative and effective catalyst for the synthesis of graphene-like materials from cellulose

Characterization of Dielectric Properties of Graphene and Graphite Using the Resonant Cavity in 5G Test Band

Point-of-care devices engaging green graphene: an eco-conscious and sustainable paradigm

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