CO2 derived nanoporous carbons for carbon capture

Liu, Shuhe; Jin, Yunbo; Bae, Jun-Seok; Chen, Huajun; Dong, Peng; Zhao, Shuchun; Li, Ruyan

doi:10.1016/j.micromeso.2020.110356

Cited by 22 publications

(10 citation statements)

References 34 publications

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“…Also, self-sustained combustion of Mg/MgO and Mg/MgO/soft or activated carbon in a CO 2 atmosphere resulted in the production of high-quality monodispersed mesoporous graphene and hierarchical porous graphene composites. , N-doped highly conductive porous graphene networks were prepared either by adding N 2 in gas flow or by mixing Mg powder with N-containing compounds like hydrazine monohydrate, ethanol amine, and melamine in different combustion processes. The nanocarbons prepared in the mentioned studies through metallothermic CO 2 reduction over Mg or its mixtures with other metals, carbons, and chemical compounds were demonstrated to be excellent nanomaterials for applications in supercapacitors, − ,,,,,,,, batteries, ,,, fuel , and solar , cells, or CO 2 capture. , …”

Section: Introductionmentioning

confidence: 95%

“…The nanocarbons prepared in the mentioned studies through metallothermic CO 2 reduction over Mg or its mixtures with other metals, carbons, and chemical compounds were demonstrated to be excellent nanomaterials for applications in supercapacitors, [28][29][30][31]33,38,39,43,44,46,47,51 batteries, 31,42,48,49 fuel 41,50 and solar 31,32 cells, or CO 2 capture. 40,45 In present research, the metallothermic CO 2 reduction was performed over a mixture of Mg with ferrocene (C 10 H 10 Fe) powder. Ferrocene was chosen because it is a widely used metal catalyst and carbon source for the preparation of carbon nanomaterials with different morphologies by chemical vapor deposition (CVD), 52−58 pyrolysis, 52,59−61 solvothermal, 52,62 and other techniques where it participates alone or in combination with other catalysts and carbon sources.…”

Section: Introductionmentioning

confidence: 99%

“…Later works investigated the effect of metals such as Zn, , Cu, Ni, , or Ca used in combination with Mg on the morphology, graphitization degree, porosity, or yield of the prepared nanocarbons. The variation of reaction conditions, namely the reaction temperature, duration, and atmosphere during heating-up, was shown to influence the yield and mesoporosity of a variety of porous nanocarbons . By adjusting the position of the substrate and reaction time, it was possible to synthesize CNTs with hierarchical multichannel structures, while the MgO templating led to the formation of nanocarbons with hierarchical raspberry-like superstructures .…”

Section: Introductionmentioning

confidence: 99%

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CO₂-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

Giannakopoulou,

Todorova,

Plakantonaki

et al. 2023

ACS Omega

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The conversion of CO2 to nanocarbons addresses a dual goal of harmful CO2 elimination from the atmosphere along with the production of valuable nanocarbon materials. In the present study, a simple one-step metallothermic CO2 reduction to nanocarbons was performed at 675 °C with the usage of a Mg reductant. The latter was employed alone and in its mixture with ferrocene, which was found to control the morphology of the produced nanocarbons. Scanning electron microscopy (SEM) analysis reveals a gradual increase in the amount of nanoparticles with different shapes and a decrease in tubular nanostructures with the increase of ferrocene content in the mixture. A possible mechanism for such morphological alterations is discussed. Transmission electron microscopy (TEM) analysis elucidates that the nanotubes and nanoparticles gain mainly amorphous structures, while sheet- and cloud-like morphologies also present in the materials possess significantly improved crystallinity. As a result, the overall crystallinity was preserved constant for all of the samples, which was confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques. Finally, electrochemical tests demonstrated that the prepared nanocarbons retained high specific capacitance values in the range of 200–310 F/g (at 0.1 V/s), which can be explained by the measured high specific surface area (650–810 m2/g), total pore volume (1.20–1.55 cm3/g), and the degree of crystallinity. The obtained results demonstrate the suitability of ferrocene for managing the nanocarbons’ morphology and open perspectives for the preparation of efficient “green” nanocarbon materials for energy storage applications and beyond.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CO₂-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

Giannakopoulou,

Todorova,

Plakantonaki

et al. 2023

ACS Omega

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“…The CO2 co n versio n int o solid nanocarbons such as graphene, carb on n an otu bes (CNTs) or nanofibers (CNFs) is a promising way to address the mentioned issue. Several conversion approaches like plasma methods, electrochemical reduction using molten salts and metallothermic reduction can be referenced (Li (2021), Liu 2020). The metallothermic reduction reactions typically use reactiv e alkali or alkaline earth metals to reduce C O2 t o ca rbon s (Dabrowska 2012).…”

Section: Introductionmentioning

confidence: 99%

CO2 Utilization for Preparation of Carbon Nanostructures

Giannakopoulou¹,

Plakantonaki²,

Vagenas³

et al.

Global NEST International Conference on Environmental Science &Amp; Technology

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The CO2 conversion to valuable materials is a challenging way to manage pollution problems. In the present work, CO2 was used as a feedstock to synthesize solid carbon nanostructures by employing a simple magnesiothermic reduction reaction under constant gas flow in a tube furnace. It was shown that the CO2 reduction at 675 oC led to the simultaneous formation of different nanocarbon morphologies including graphene, tubular and spherical carbon nanostructures. The synthesized material was characterized using XRD analysis, Raman spectroscopy, SEM and TEM microscopies which demonstrated its good crystallinity and morphological diversity. Electrochemical tests were performed to evaluate specific capacitance and cycling stability of the prepared sample. The calculated values of ~ 325 F/g at scan rate 0.1 V/s revealed that the obtained nanostructures can be used as effective functional material for supercapactior applications.

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“…[6] The porous carbon material has significant advantages over other porous materials. [7] It is noteworthy to identify and develop an effective sorbent material with high adsorption capacity and easily regenerable towards CO 2 separation. By comparing numerous activated carbons, coconut shell-based activated carbon is in granular shape, with developed pores, high strength, economic durability, and renewable.…”

Section: Introductionmentioning

confidence: 99%

The Synergistic Character of Highly N‐Doped Coconut–Shell Activated Carbon for Efficient CO₂ Capture

et al. 2021

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The coconut shell-based activated carbon (AC) surface was effectively anchored with amine moieties with acid treatment followed by tetraethylenepentamine (TEPA) anchoring. The activated carbon surface enhanced with basicity is likely to increase the sorbent properties towards CO 2 adsorption. The AC surface was modified by varying TEPA concentrations. After amine doping, significant loss in textural property indicates their occupation inside the pores and surfaces. Further, the samples were thermally activated to retrieve the textural properties. The physicochemical properties of modified carbon were characterized using BET, TPD, FT-IR, Raman spectroscopy and elemental composition. The amine-modified and thermally activated carbons were tested for CO 2 adsorption up to 25 bar at 25°C. The acid-base properties of N-doped carbons were evaluated using isopropanol as a model test reaction at atmospheric pressure. The IPA reaction products of acetone and propene were quantified for their acid-base nature and correlated to CO 2 adsorption capacities. The CO 2 adsorption capacity increases by tailoring synergistic properties between surface basicity and micropores. Hence, 20 % TEPA-derived nitrogen-enriched carbon reveals a higher yield of acetone 73 %, which in turn enhanced CO 2 adsorption capacity of 9.9 mmol/g, and it is found to be a suitable applicant for CO 2 capture.

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CO2 derived nanoporous carbons for carbon capture

Cited by 22 publications

References 34 publications

CO₂-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

CO₂-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

CO2 Utilization for Preparation of Carbon Nanostructures

The Synergistic Character of Highly N‐Doped Coconut–Shell Activated Carbon for Efficient CO₂ Capture

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CO2 derived nanoporous carbons for carbon capture

Cited by 22 publications

References 34 publications

CO2-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

CO2-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

CO2 Utilization for Preparation of Carbon Nanostructures

The Synergistic Character of Highly N‐Doped Coconut–Shell Activated Carbon for Efficient CO2 Capture

Contact Info

Product

Resources

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CO₂-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

CO₂-Derived Nanocarbons with Controlled Morphology and High Specific Capacitance

The Synergistic Character of Highly N‐Doped Coconut–Shell Activated Carbon for Efficient CO₂ Capture