Carbon Nanotubes

Ohashi, Toshiyuki

doi:10.1002/9781118980989.ch2

Cited by 3 publications

(3 citation statements)

References 181 publications

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“…103 The hybridization of graphene is sp 2 , with the graphene structure covalently bonded like a honeycomb structure, which potentially permits easy attachment with hydrogen atoms. 104 Owing to its flexibility, this graphene allows hydrogen to facilitate the easy assimilation of the module. The adsorption process occurs either through physisorption or chemisorption, adsorbing hydrogen onto the surface of graphene.…”

Section: Graphene-based Nanocompositesmentioning

confidence: 99%

Carbon‐based nanocomposites in solid‐state hydrogen storage technology: An overview

et al. 2020

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Hydrogen fuel is becoming a hot topic among the scientific community as an alternative energy source. Hydrogen is eco-friendly, renewable, and green. The synthesis and development of materials with great potential for hydrogen storage is still a challenge in research and needs to be addressed to store hydrogen economically and efficiently. Various solid-state materials have been fabricated for hydrogen energy storage; however, carbon-based nanocomposites have gained more attention because of its high surface area, low processing cost, and light weight nature. Carbon materials are easy to modify with various metals, metal oxides (MOs), and other organometallic frameworks because of the functional groups available on the surface and edges that increase the storage capacity of hydrogen. In addition, chemisorption is another way to enhance the hydrogen storage capacity of carbonbased nanocomposites. In this review, we discuss the success achieved thus far and the challenges that remain for the physical and chemical storage of hydrogen in various carbon-based nanocomposites. Various compositions of catalysts (eg, metal, MOs, alloy, metal organic frameworks) and carbon materials are designed for hydrogen storage. Superior energy storage in hybrids and composites as compared with pristine materials (catalysts or carbon nanotubes) is governed by the interaction, activation, and hydrogen adsorption/ absorption mechanism of materials in the reaction profile. (Nano)composites comprising carbon material with metals, MOs, or alloys are important in this field, not only because of their potential for hydrogen sorption but also their significant cyclic stability and high efficiency upon successive adsorptiondesorption cycles.

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Section: Graphene-based Nanocompositesmentioning

confidence: 99%

Carbon‐based nanocomposites in solid‐state hydrogen storage technology: An overview

et al. 2020

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“…The hollow fiber‐like nanomaterials having a high aspect ratio and diameters below 100 nm are categorized as carbon nanotubes (CNT) which are of significance based on their high tensile strength, optical transmission, electrical conductivity, and adsorption of gases. They are generally classified as single‐walled, double‐walled, and multi‐walled, depending on the number of layers they are composed of 77 …”

Section: Methods For Co2 Conversionmentioning

confidence: 99%

“…They are generally classified as single-walled, double-walled, and multiwalled, depending on the number of layers they are composed of. 77 Carbon nanotube wool of uniform length was synthesized from CO 2 by molten electrolysis using nickel chrome nucleation, Monel cathode substrates, and electrolyte equilibration. 78 Carbon nanotube wool was synthesized by electrolysis of molten Li 2 CO 3 , a Monel cathode, and Nichrome as an anode at 770 C. 78 Ni powder was directly added to the molten carbonate (electrolyte), which generated carbon nanotube wool of optimum length.…”

Section: Carbon Nanotubes (Cnt)mentioning

confidence: 99%

Transformation of carbon dioxide, a greenhouse gas, into useful components and reducing global warming: A comprehensive review

Tran

Nguyen

2022

Intl J of Energy Research

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Summary CO2, a greenhouse gas, is continuously emitted by different sources due to the extensive use of fossil fuels. Hence various methods have been developed to mitigate CO2 gas from the environment. The capturing and storing of carbon is termed carbon capture and storage, a method of reducing the level of CO2 from the atmosphere emitted by industrial sites and power stations. The reduction of the atmospheric carbon or the stored carbon to different products by multiple techniques has been a current topic of research, taking the environmental concern into account. The reduction of CO2 is very challenging since the bond energy of C=O is very high. Additionally, the separation of the gas from the atmosphere or industrial flue gas is also technologically difficult. This review comprises a detailed discussion of the methods adopted for the conversion of CO2 into different carbon nano‐materials and hydrocarbons. The mechanisms associated with the conversion, along with the role of electrodes used for the conversion of the gas during electrolysis, have also been conferred extensively.

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Carbon-based nanomaterials for concrete applications

Ćwirzeń¹

2021

Carbon Nanotubes and Carbon Nanofibers in Concrete-Advantages and Potential Risks

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Carbon Nanotubes

Cited by 3 publications

References 181 publications

Carbon‐based nanocomposites in solid‐state hydrogen storage technology: An overview

Carbon‐based nanocomposites in solid‐state hydrogen storage technology: An overview

Transformation of carbon dioxide, a greenhouse gas, into useful components and reducing global warming: A comprehensive review

Carbon-based nanomaterials for concrete applications

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