Fabrication and optimization of activated carbon-based graphene oxide from rice husks as an alternative to graphite

Fathy, Nady A.; Sayed Ahmed, Sohair A.; Aboelenin, Reham M.; El-Shafey, Shaimaa S.

doi:10.1039/d4nj00475b

New J. Chem.

2024

DOI: 10.1039/d4nj00475b

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Fabrication and optimization of activated carbon-based graphene oxide from rice husks as an alternative to graphite

Nady A. Fathy,

Sohair A. Sayed Ahmed,

Reham M. Aboelenin

et al.

Abstract: Processing of renewable, abundant, and low-cost biomass into graphene materials -like porous carbon materials for application in environmental, electronics and clean energy has been attracting interest in last decades. In...

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Carbon Nanosheet Preparation By Low-Temperature Two-Step Carbonization: A Study of Their Properties and Mechanism of Adsorption of Oxidized H₂S

Li,

Yang

et al. 2024

Langmuir

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Straw, as a kind of biomass waste, has the advantages of low cost and abundant storage, which makes it a promising renewable resource. Using rice straw as a carbon source, carbon nanosheets were prepared by a two-step carbonization method combining low-temperature pyrolysis and low-temperature hydrothermal, and they were used as H 2 S removal agents. The results showed that during the two-step carbonization process, the adsorption performance of carbon nanosheets for H 2 S showed a tendency of enhancing and then weakening with the increase of pyrolysis temperature in the first step, and the sulfur capacity could reach 3.1 mg/g at the maximum of the pyrolysis temperature of 200 °C, which was superior to or close to that of the modified or activated carbon. The XPS, EPR, and CO 2 -TPD tests showed that the surface of carbon nanosheets was alkaline, containing a large number of hydroxyl groups and the presence of phenoxy persistent free radicals or semiquinone persistent free radicals. It was analyzed that the direct or indirect oxidation of H 2 S by the persistent radicals under an alkaline environment could convert the − 2-valent sulfur into − 1-, 0-and + 6-valent sulfur to realize the adsorption and removal of H 2 S. This work, while offering the possibility of utilizing carbon nanosheets made from straw as a material for H 2 S adsorption and removal, also expands the application of straw waste in exhaust gas treatment.

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Carbon Nanosheet Preparation By Low-Temperature Two-Step Carbonization: A Study of Their Properties and Mechanism of Adsorption of Oxidized H₂S

Li,

Yang

et al. 2024

Langmuir

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show abstract

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Fabrication and optimization of activated carbon-based graphene oxide from rice husks as an alternative to graphite

Abstract: Processing of renewable, abundant, and low-cost biomass into graphene materials -like porous carbon materials for application in environmental, electronics and clean energy has been attracting interest in last decades. In...

Cited by 1 publication

References 68 publications

Carbon Nanosheet Preparation By Low-Temperature Two-Step Carbonization: A Study of Their Properties and Mechanism of Adsorption of Oxidized H₂S

Carbon Nanosheet Preparation By Low-Temperature Two-Step Carbonization: A Study of Their Properties and Mechanism of Adsorption of Oxidized H₂S

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Fabrication and optimization of activated carbon-based graphene oxide from rice husks as an alternative to graphite

Abstract: Processing of renewable, abundant, and low-cost biomass into graphene materials -like porous carbon materials for application in environmental, electronics and clean energy has been attracting interest in last decades. In...

Cited by 1 publication

References 68 publications

Carbon Nanosheet Preparation By Low-Temperature Two-Step Carbonization: A Study of Their Properties and Mechanism of Adsorption of Oxidized H2S

Carbon Nanosheet Preparation By Low-Temperature Two-Step Carbonization: A Study of Their Properties and Mechanism of Adsorption of Oxidized H2S

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Carbon Nanosheet Preparation By Low-Temperature Two-Step Carbonization: A Study of Their Properties and Mechanism of Adsorption of Oxidized H₂S

Carbon Nanosheet Preparation By Low-Temperature Two-Step Carbonization: A Study of Their Properties and Mechanism of Adsorption of Oxidized H₂S