Preparation and characterization of colloidal dispersions of graphene-like structures from different ranks of coals

Savitskii, D. P.

doi:10.1016/s1872-5813(17)30043-9

Cited by 24 publications

(16 citation statements)

References 10 publications

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“…[42] The O/C ratio was calculated after curve fitting, GO-WTP was 0.385 and GO-WTP-t was 0.444. The oxygen related components are more dominant in GO-WTP-t, indicating that G-WTP-t introduced more oxygen-containing functional groups in the process of oxidation intercalation, which accords with the conclusion that high graphitization degree is of great benefit to the intercalation of graphite by the oxygencontaining groups during oxidation, [12] so GO-WTP-t has better exfoliation properties ( Figure 1B). The O/C atomic ratio of GS-WTP and GS-WTP-t decreased significantly after hydrazine hydrate reduction, some oxygen-containing functional groups such as -COOH disappeared.…”

Section: Analysis Of X-ray Photoelectron Spectroscopysupporting

confidence: 80%

“…After high‐temperature treatment, coal can converse to artificial graphite which is widely used in the preparation of carbon nanomaterials . Compared with other carbon sources, coal is an inexpensive and abundant raw material and has broad prospects for the preparation of graphene . Using coal as the material of graphene industry is not only a great way to improve the value of coal utilization but also significantly reduces the cost.…”

Section: Introductionmentioning

confidence: 99%

“…[10] Compared with other carbon sources, coal is an inexpensive and abundant raw material and has broad prospects for the preparation of graphene. [11][12] Using coal as the material of graphene industry is not only a great way to improve the value of coal utilization but also significantly reduces the cost. Currently, Quan et al has successfully prepared graphene from famous "Taixi" anthracite in China as carbon source.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Minerals in Anthracite on the Formation of Coal‐Based Graphene

et al. 2019

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The minerals in raw anthracite significantly limit the preparation of coal‐based graphene. Raw and demineralized anthracites were graphitized and coal‐based graphene was prepared by improved Hummers’ oxidation‐reduction method. The morphologies, crystal structures and spectroscopic characteristics of the products in various stages were characterized by scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy and Raman spectroscopy. The results show that demineralized or not, anthracite can be used to prepare graphene, but the minerals in anthracite physically inhibit the directional development of graphene sheets. And the residual high temperature conversion products of the minerals embedded between graphene sheets will lead to multiple irregular pore defects on the surface of graphene, which will have strongly unfavorable effects on the properties of coal‐based graphene materials. Demineralization of raw anthracite can reduce the defective pores and oxygen‐containing functional groups on the surface of coal‐based graphene and improves its morphology and properties.

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Section: Analysis Of X-ray Photoelectron Spectroscopysupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Minerals in Anthracite on the Formation of Coal‐Based Graphene

et al. 2019

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“…On introduction of these flat sheets of GO into acidic medium, a clenched fists configuration was attained through the phenomenon named as ''close-open sesame behaviour''. Wherein, by using highly graphitized carbon network of anthracite, GO colloidal suspension was prepared via Hummer's method (Savitskii 2017). Vijapur et al (2017) and Das et al (2016a, b) demonstrated the exfoliation of graphene sheets from sub-bituminous coal.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical efficacies of coal derived nanocarbons

Thomas

Balachandran

2020

Int J Coal Sci Technol

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Carbon based nanomaterials are acknowledged for their admirable optical, electrical, mechanical characteristics and broad class of applications. Choice of precursor and simple synthesis techniques have decisive roles in viable production and commercialization of carbon produce. The intense demand to develop high purity carbon nanomaterials through inexpensive techniques has promoted usage of fossil derivatives as feasible source of carbon. Coal serves as a naturally available, abundant and cheap feedstock for carbon materials. From the crystalline clusters of aromatic hydrocarbons in a cross-linked network, carbon nanostructures can easily be extracted through green synthesis routes. It promotes a potent alternative for the cost effective and scaled up production of nanocarbon. The well-developed pores distribution, presence of numerous active sites and appropriate migration channels for ions enhance the electrochemical parameters necessary for the fabrication of supercapacitors, batteries and electrochemical sensors. The metallic impurities contained in coal contribute towards faradic redox reactions required for an efficient electrode modification. In this review, the potential uses of coal based carbon nanomaterials in energy storage and environmental sectors are discussed in detail.

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“…Coalification is a biogeochemical process that takes place over an extended period, converting dead plants into peat, which, in turn, transforms to lignite and eventually to anthracite. There are abundant nanometer-sized graphitic crystallites contained within the intrinsic structure of coal that can be extracted with simple procedures and can be easily functionalized. − The percentage of sp 2 carbon domain varies with the coalification degree, and the trend is 70, 75, 85, and 94 wt % in lignite, sub-bituminous coal, bituminous coal, and anthracite, respectively. As the most inexpensive and abundant source of carbon found in nature, coal has the advantage over most commonly used expensive precursors, such as high-purity graphite, hydrocarbon precursor, etc.…”

Section: Introductionmentioning

confidence: 99%

Coal-Based Fluorescent Zero-Dimensional Carbon Nanomaterials: A Short Review

Raj

Balachandran

2020

Energy Fuels

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Carbon nanomaterials (CNs) have fascinated material scientist owing to their outstanding properties, making them potential materials for numerous critical applications. Over the years, scientists have reported several techniques for the production of CNs from distinctive precursors using various top-down and bottom-up approaches. Coal is being proven as an inexpensive, abundant, and effective carbon source for harvesting CNs with unique characteristics, properties, and high production yield. CNs derived from coal exhibit excellent fluorescence property, which can be tuned by varying the degree of oxidation, particle size, surface functionalization, etc. The fluorescent coal-derived CNs are effective materials for label-free bioimaging and selective sensing applications. In this review, we encompass the synthesis of different kinds of CNs from coal, their fluorescence properties, proposed fluorescence mechanisms, factors affecting fluorescence property, and fluorescence sensing and bioimaging applications.

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Preparation and characterization of colloidal dispersions of graphene-like structures from different ranks of coals

Cited by 24 publications

References 10 publications

Effects of Minerals in Anthracite on the Formation of Coal‐Based Graphene

Effects of Minerals in Anthracite on the Formation of Coal‐Based Graphene

Electrochemical efficacies of coal derived nanocarbons

Coal-Based Fluorescent Zero-Dimensional Carbon Nanomaterials: A Short Review

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