Facile synthesis of macroalgae-derived graphene adsorbents for efficient CO2 capture

Ai, Ning; Lou, Sa; Lou, Fengyan; Xu, Chengda; Wang, Qining; Zeng, Guoxun

doi:10.1016/j.psep.2021.02.014

Cited by 29 publications

(21 citation statements)

References 52 publications

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“…Recently, a variety of solid physical adsorbents, such as fullerene (B40) [8], metal-organic frameworks (MOFs) [9], carbon nanotubes [10], zeolites [11], porous carbon (PC) [12], graphene [13], and others have been developed to substitute traditional alkanolamines [14]. Because of their exceptional characteristics, MOFs and porous carbons received much interest.…”

Section: Introductionmentioning

confidence: 99%

Green self-activating synthesis system for porous carbons: Celery biomass wastes as a typical case for CO2 uptake with kinetic, equilibrium and thermodynamic studies

Khosrowshahi

Mashhadimoslem

Emrooz

et al. 2022

Diamond and Related Materials

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Section: Introductionmentioning

confidence: 99%

Green self-activating synthesis system for porous carbons: Celery biomass wastes as a typical case for CO2 uptake with kinetic, equilibrium and thermodynamic studies

Khosrowshahi

Mashhadimoslem

Emrooz

et al. 2022

Diamond and Related Materials

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Section: Introductionmentioning

confidence: 99%

Green Self-Activating Synthesis System for Porous Carbons; Celery Biomass Wastes as a Typical Case for CO2 Uptake with Kinetic, Equilibrium and Thermodynamic Studies

Khowsroshahi

Mashhadimoslem

Emrooz

et al. 2022

Preprint

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A green self-activating synthesis system (SASS) has been introduced for porous carbons. In the presented system, there is no external support for the activation process, and the activating agents are the circulating gases released during the pyrolysis treatment. As a typical case, this system was used for the synthesis of hierarchical porous carbons from celery wastes in hydroponic greenhouses. Based on the adsorption-desorption results, the optimal porous carbons were synthesized at 700°C, providing a surface area as high as 1126 m2g−1 and micropore volume of approximately 0.7 cm3g−1. X-ray photoelectron spectroscopy indicated the presence of graphitic nitrogen in the synthesized porous carbon structure. The synthesized porous carbons were applied as an adsorbent for CO2 capture. CO2 adsorption was performed at low and high pressures at various temperatures. Under low pressures (0-1 bar), the synthesized carbons adsorbed 5 mmolg−1 at 0°C and 2.03 mmolg−1 at 25°C. The adsorption capacity of the synthesized carbon at 25°C and a relatively high pressure of 9.5 bar was 9.57 mmolg−1. Based on the thermodynamic and kinetic models, it was clarified that the adsorption process can be regarded as physisorption with an adsorption enthalpy of 23.2 kJ.mol−1. Additionally, the fractional-order kinetic model was found to be the best match in the kinetic curves. The synthesis system described herein represents a promising strategy for producing green porous carbon from various waste organic precursors.

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“…We have used Sargassum horneri ( SH ) to produce activated carbon, 26,27 graphene 28 and biocarbon, 29,30 and those works showed the good adsorption performance of SH ‐based carbon material. However, those works adapted traditional chemical activation under high‐temperature circumstances, thus inevitably using much thermal energy or bringing contamination to some degree.…”

Section: Introductionmentioning

confidence: 99%

Sargassum horneri‐based carbon‐doped TiO₂ and its aquatic naphthalene photodegradation under sunlight irradiation

Zeng

Hong

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND During the past two decades, aquatic polycyclic aromatic hydrocarbon (PAH) contamination has gained more and more attention, because of carcinogenicity or mutagenicity, toxicity, persistence and bioaccumulation, and a huge threat posed to entire ecosystems. RESULTS Sargassum horneri (SH)‐based carbon was pretreated with ethanol and formaldehyde, and obtained after pre‐carbonization using H2SO4. The SH carbon powder was used to immobilize nano‐TiO2 in aquatic environment by a facile sol–gel method. The resulting C/TiO2 catalyst was applied to photocatalytic aquatic naphthalene degradation under sunlight and showed the best naphthalene degradation performance of 83.77% under simulated sunlight, which could be attributed to the shape and structure contribution originating from SH. C/TiO2 served as both adsorbent and catalyst in the degradation process of naphthalene, and the photodegradation process conformed to a double‐exponential kinetic model, indicating that there are physical and chemical processes involved in the degradation. The mechanism for enhanced photocatalytic activity was verified as a synergistic mechanism resulting from SH‐based carbon and TiO2, and showed industrial potential for removal aquatic PAH pollutants. CONCLUSIONS This study verifies that the synergistic effect resulting from SH‐based carbon and TiO2 enhanced the photocatalytic performance. © 2021 Society of Chemical Industry (SCI).

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Facile synthesis of macroalgae-derived graphene adsorbents for efficient CO2 capture

Cited by 29 publications

References 52 publications

Green self-activating synthesis system for porous carbons: Celery biomass wastes as a typical case for CO2 uptake with kinetic, equilibrium and thermodynamic studies

Green self-activating synthesis system for porous carbons: Celery biomass wastes as a typical case for CO2 uptake with kinetic, equilibrium and thermodynamic studies

Green Self-Activating Synthesis System for Porous Carbons; Celery Biomass Wastes as a Typical Case for CO2 Uptake with Kinetic, Equilibrium and Thermodynamic Studies

Sargassum horneri‐based carbon‐doped TiO₂ and its aquatic naphthalene photodegradation under sunlight irradiation

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Facile synthesis of macroalgae-derived graphene adsorbents for efficient CO2 capture

Cited by 29 publications

References 52 publications

Green self-activating synthesis system for porous carbons: Celery biomass wastes as a typical case for CO2 uptake with kinetic, equilibrium and thermodynamic studies

Green self-activating synthesis system for porous carbons: Celery biomass wastes as a typical case for CO2 uptake with kinetic, equilibrium and thermodynamic studies

Green Self-Activating Synthesis System for Porous Carbons; Celery Biomass Wastes as a Typical Case for CO2 Uptake with Kinetic, Equilibrium and Thermodynamic Studies

Sargassum horneri‐based carbon‐doped TiO2 and its aquatic naphthalene photodegradation under sunlight irradiation

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Sargassum horneri‐based carbon‐doped TiO₂ and its aquatic naphthalene photodegradation under sunlight irradiation