Graphene materials from microwave-derived carbon precursors

González, Zoraida; Acevedo, Beatriz; Predeanu, Georgeta; Axinte, Sorin Mircea; Drăgoescu, Marius-Florin; Slăvescu, Valerica; Fernández, Juan José; Granda, Marcos; Gryglewicz, Grażyna; Melendi-Espina, Sonia

doi:10.1016/j.fuproc.2021.106803

Cited by 14 publications

(6 citation statements)

References 27 publications

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“…It is well-known that most carbon materials are very good MW absorbers . As a consequence, the efficient heat energy input can be exploited for promoting several types of chemical reactions, including synthesis, reduction, exfoliation, doping, decoration, etc . Novel carbon-based composite electrodes combining metals/metal oxides with graphene derivatives, like graphene oxide (GO), reduced graphene oxide (rGO), graphene nanosheets (GNSs), and graphene nanoribbons (GNRs), have been researched for improved electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Microwave as a Tool for Synthesis of Carbon-Based Electrodes for Energy Storage

Kumar

Sahoo²,

Joanni

et al. 2021

ACS Appl. Mater. Interfaces

137

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This Spotlight on Applications highlights the significant impact of microwave-assisted methods for synthesis and modification of carbon materials with enhanced properties for electrodes in energy storage applications (supercapacitors and batteries). For the past few years, microwave irradiation has been increasingly used for the synthesis of carbon materials with different morphologies using various precursors. Microwave processing exhibits numerous advantages, such as short processing times, high yield, expanded reaction conditions, high reproducibility, and high purity of products. On this frontier research area, we have discussed microwave-assisted synthesis, defect creation, simultaneous reduction and exfoliation, and heteroatom doping in carbon materials. By careful manipulation of microwave irradiation parameters, the method becomes a powerful and efficient tool to generate different morphologies in carbon-based materials. Other important outcomes are the flexible control over the degree of reduction and exfoliation of graphene derivatives, the generation of defects in graphene-based materials by metals, the intercalation of metal oxides into graphene derivatives, and heteroatom doping of graphene materials. The Spotlight on Applications aims to provide a condensed overview of the current progress in carbon-based electrodes synthesized by microwave, pointing out outstanding challenges and offering a few suggestions to trigger more research endeavors in this important field.

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Section: Introductionmentioning

confidence: 99%

Microwave as a Tool for Synthesis of Carbon-Based Electrodes for Energy Storage

Kumar

Sahoo²,

Joanni

et al. 2021

ACS Appl. Mater. Interfaces

137

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“…The difference in specific surface area between the two was attributed to the different pore structures of the carbonized precursors (Figure S4, Supporting Information). [26] Nevertheless, the porous wood-derived carbon frameworks were vulnerable and exhibited irreversible deformation when external mechanical forces were applied. It is well known that 3D porous materials are often impregnated with other materials to obtain functional composite materials.…”

Section: Resultsmentioning

confidence: 99%

“…The difference in specific surface area between the two was attributed to the different pore structures of the carbonized precursors (Figure S4, Supporting Information). [ 26 ]…”

Section: Resultsmentioning

confidence: 99%

Sustainable and Conductive Wood‐Derived Carbon Framework for Stretchable Strain Sensors

Sun

Cui

et al. 2021

Advanced Sustainable Systems

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sensing element with good electromechanical properties and an elastic polymer matrix. [2] The selection of the sensitive material is critical to the sensing performance. The common active conductive materials include metal nanowires (e.g., gold and silver), [3] conductive polymers (e.g., polyaniline and polypyrrole) [4] and carbon nanomaterials (e.g., graphene, carbon nanotubes, and carbon black). [5] Among them, carbon nanomaterials feature with high diversity and adjustable structure and resistance, which are the most promising candidate materials. However, their preparation processes are time-consuming, complex and costly, and may produce environmentally harmful byproducts. Besides, the intractable dispersion problem of carbon nanomaterials also restricts large-scale production. Hence, sustainable and cost-effective approaches for constructing carbon conductive networks are highly desired. Biomass materials are renewable and abundant, offering a simple but attractive alternative to building multifunctional carbonaceous materials without using limited fossil resources. [6] The biomass-derived carbon has been utilized as a conductive material to assemble environmentally friendly and low-cost electronics on account of their renewable resources and nature structure. For instance, Wang et al. developed an ultrasensitive wearable strain sensor by combining carbonized silk and silicon substrate. [7] Zhang et al. prepared carbonized cotton fabric based stretchable strain sensors with high performance. [8] Wood is one of the richest natural sources of carbon, which possesses natural and unique 3D mesoporous structure with multi-channels. [9] These characteristics make wood an appropriate precursor to produce 3D porous carbon conductive networks. Although there have been several studies on wood-based flexible electronics, [10] the wood-derived carbon has not been investigated for tensile sensing. In general, the performances of carbon materials depend on the structure and properties of the carbonized precursors. [11] As one of the three major components of wood, lignin provides rigidity for wood, [12] which may affect the flexible utilization of carbon products. To further explore whether the presence of lignin affects the application of wood in flexible electronics, we took wood and delignified wood framework (DWF) as carbon precursors separately and discussed the electrical conductivity and potential for strain sensors of the two carbon products carbonized wood framework (CWF) and carbonized delignified wood framework (CDWF).Conductive carbon materials have recently received increasing interest for their potential applications in wearable electronics and electronic skins because of their adjustable structure and resistance. However, high cost, large energy consumption, and potential biological toxicity put a huge obstacle in the way of practical application in electronics. Bio-derived carbon, which possesses sustainability and low cost, is an ideal substitute for traditional carbon materials. Here, a facile and e...

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“…For liquid-phase applications, advanced carbon materials (ACMs) are by far the best-known adsorbents of this type, whose upward trend is rapidly strengthening due to the need to implement environmental regulations [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. In this regard, some carbon-based nanomaterials have recently been obtained due to their diversity, favorable properties, and active applications including fullerenes, graphene-based materials (playing an important role in energy conversion and storage fields due to the attractive qualities of graphene) [ 14 , 15 ], carbon nanotubes (considered as highly conductive materials for battery electrodes), carbon nanofibers, which are attracting great attention in the electroanalytical area for energy storage, etc. [ 16 , 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Advanced Carbon Materials Used as Precursors for Adsorbents Applied in Wastewater Treatment

et al. 2023

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Huge amounts of vegetable waste, mainly resulting from the food industry, need large areas for storage, as they could cause hazardous environmental impact, leading to soil and water pollution or to CO2 emissions during accidental incineration. This work was aimed at recycling certain lignocellulosic waste (walnut shells, kernels of peach, apricot, and olive) to design advanced carbon material precursors (ACMP) to be used for obtaining nano-powders with high applicative potential in pollution abatement. Both waste and ACMP were characterized using proximate and elemental analysis, and by optical microscopy. Complex characterization of raw materials by FTIR, TGA-DTG, and SEM analysis were carried out. The ACMP were synthetized at 600–700 °C by innovative microwave heating technology which offers the advantages of lower energy consumption using 3.3 kW equipment at laboratory level. The ACMP ash < 3% and increased carbon content of 87% enabled the development of an extended pore network depending on degassing conditions during heating. TEM analysis revealed a well-developed porous structure of the synthesized ACMP carbonaceous materials. Due to the presence of oxygen functional groups, ACMPs exhibit adsorption properties highlighted by an iodine index of max. 500 mg/g and surface area BET of 300 m2/g, which make them attractive for removal of environmental pollutants such as dyes having molecule sizes below 2 nm and ions with pore dimensions below 1 nm, widely used industrially and found in underground waters (NO3−) or waste waters (SO4−2).

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Graphene materials from microwave-derived carbon precursors

Cited by 14 publications

References 27 publications

Microwave as a Tool for Synthesis of Carbon-Based Electrodes for Energy Storage

Microwave as a Tool for Synthesis of Carbon-Based Electrodes for Energy Storage

Sustainable and Conductive Wood‐Derived Carbon Framework for Stretchable Strain Sensors

Green Synthesis of Advanced Carbon Materials Used as Precursors for Adsorbents Applied in Wastewater Treatment

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