Copper ions-assisted inorganic dynamic porogen of graphene-like multiscale microporous carbon nanosheets for effective carbon dioxide capture

Shi, Weiwei; Zhang, Quanqi; Liu, Shiji; Su, Suisui; Chang, Binbin; Yang, Baocheng

doi:10.1016/j.jcis.2021.04.146

Cited by 13 publications

(6 citation statements)

References 56 publications

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“…Such results confirm that the introduction of surface nitrogen functional groups plays a significant role in improving CO 2 /N 2 selectivity owing to the more strengthening affinity of the CO 2 molecule. NHPC-1.5 presents an exceptional selectivity of 147 at 0.15 bar and 298 K and still reaches 73 at 1.0 bar and 298 K, which is much higher than those of other porous carbon-based adsorbents. − Such superior CO 2 /N 2 selectivity should be ascribed to the synergistic effect of the large ultramicropore volume and high nitrogen-doping amount.…”

Section: Resultsmentioning

confidence: 96%

Hierarchically Nanoporous Carbon for CO₂ Capture and Separation: Roles of Morphology, Porosity, and Surface Chemistry

Shi

Liu

et al. 2023

ACS Appl. Nano Mater.

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Nanoporous carbons, as promising adsorbents for CO 2 capture and separation from flue gas, span the major challenge of optimizing the physicochemical property to meet the need of CO 2 capture and separation. Herein, we rationally engineered sustainable nanoporous carbons with tailorable porosity and rich surface chemistry using an activating agent of small-molecule organic acids. The porosity could be easily tailored by varying the activation temperature and activator dosage. The surface chemistry and morphology could be tuned by changing the dopant concentration. In detail, porosity played a determinant role in CO 2 adsorption capacity, especially ultramicroporosity. Narrow micropores brought major contributions to CO 2 uptake at low pressure, while mesopores played a great role at high adsorption pressure. Surface chemistry played a critical role in CO 2 capture, especially adsorption selectivity and the isosteric heat of adsorption when the ultramicroporosity was optimal. We revealed that the C−OH group (one type of oxygen-containing species) made a relatively high contribution for improving CO 2 capture by hydrogen bonding. For nitrogen-containing groups, the pyridinic-N, pyrrolic-N, and amine groups provoked more improvements in CO 2 capture by offering more basic CO 2 -philic sites, while the oxidized-N group made a weak influence. Sheet-like structures exhibited more accessible affine sites for fast CO 2 capture and separation. We proposed a valuable reference for rationally engineering nanoporous carbons with the optimal texture to meet the different requirements of CO 2 capture. More importantly, the conversion of biowaste into high-added-value adsorbents for effective CO 2 capture and separation opened up an elegant route of killing two birds with one stone.

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Section: Resultsmentioning

confidence: 96%

Hierarchically Nanoporous Carbon for CO₂ Capture and Separation: Roles of Morphology, Porosity, and Surface Chemistry

Shi

Liu

et al. 2023

ACS Appl. Nano Mater.

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“…During the heat treatment, the carbon skeleton was generated and reacted with CuCl 2 to etch the carbon skeleton. Under the dynamic pore-creating of CuCl 2 , the evaporation and leaching of Cu can gradually generate developed hierarchical micropores . Importantly, the hierarchical microporosity can be tailored by adjusting the concentration of CuCl 2 .…”

Section: Resultsmentioning

confidence: 99%

CuCl₂-Activated Sustainable Microporous Carbons with Tailorable Multiscale Pores for Effective CO₂ Capture

Yao,

Li,

Liu

et al. 2023

ACS Omega

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Porosity is the key factor in determining the CO 2 capture capacity for porous carbon-based adsorbents, especially narrow micropores of less than 1.0 nm. Unfortunately, this desired feature is still a great challenge to tailor micropores by an effective, low-corrosion, and environmentally friendly activating agent. Herein, we reported a suitable dynamic porogen of CuCl 2 to engineer microporous carbons rich in narrow micropores of <1.0 nm for solving the above problem. The porosity can be easily tuned by varying the concentration of the CuCl 2 porogen. The resultant porous carbons exhibited a multiscale micropore size, high micropore volume, and suitable surface nitrogen doping content, especially high-proportioned ultromicropores of <0.7 nm. As adsorbents for capturing CO 2 , the obtained microporous carbons possess satisfactory CO 2 uptake, moderate heat of CO 2 adsorption, reasonable CO 2 /N 2 selectivity, and easy regeneration. Our work proposes an alternative way to design porous carbon-based adsorbents for efficiently capturing CO 2 from the postcombustion flue gases. More importantly, this work opens up an almost-zero cost and industrially friendly route to convert biowaste into high-added-value adsorbents for CO 2 capture in an industrial practical application.

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“…7c, the all curves of GCD at different current densities exhibited the symmetrical triangle shapes, indicating the good rate capability and the highly reversible charge-discharge process. 53,[69][70][71][72][73] The symmetric device delivered a specific capacitance of 211.23 F g −1 at the current density of 0.5 A g −1 . In addition, the Ragone plot revealed the energy density and power density of the device at different current densities in Fig.…”

Section: Resultsmentioning

confidence: 99%

Biomass-Derived N/O/P Tri-Doped Hierarchically Porous Carbon with a Wider Potential Window for Flexible Energy Storage Devices

Fan¹,

Wu²,

Wang³

et al. 2021

J. Electrochem. Soc.

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Waste biomass shows great potential as a carbonaceous electrode material candidate for energy storage devices due to its abundant element composition and renewability. Here, we propose a facile approach to prepare N/O/P tri-doped hierarchical porous carbon electrode materials via forming a hydrogel with chitosan and phytic acid through electrostatic and hydrogen bonding. The assamples exhibit large specific surface area, hierarchical pore structure and plentiful heteroatom doping. As the electrode materials, APC-2 achieves high specific capacitance of 320 F g −1 at 1 A g −1 and extraordinary cycling stability with 97% capacitance retention after 10000 cycles. Remarkably, by P-doping the voltage window of assembled symmetric supercapacitor is widened to 1.3 V in alkaline electrolyte and 1.7 V in neutral electrolyte. The energy density is up to 15.82 W h kg −1 at the power density of 850 W kg −1 in Na 2 SO 4 electrolyte. These outstanding performance indicated that the facile conversion of renewable biomass hold prominent prospect for the sustainable applications in energy storage devices.

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Copper ions-assisted inorganic dynamic porogen of graphene-like multiscale microporous carbon nanosheets for effective carbon dioxide capture

Cited by 13 publications

References 56 publications

Hierarchically Nanoporous Carbon for CO₂ Capture and Separation: Roles of Morphology, Porosity, and Surface Chemistry

Hierarchically Nanoporous Carbon for CO₂ Capture and Separation: Roles of Morphology, Porosity, and Surface Chemistry

CuCl₂-Activated Sustainable Microporous Carbons with Tailorable Multiscale Pores for Effective CO₂ Capture

Biomass-Derived N/O/P Tri-Doped Hierarchically Porous Carbon with a Wider Potential Window for Flexible Energy Storage Devices

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Copper ions-assisted inorganic dynamic porogen of graphene-like multiscale microporous carbon nanosheets for effective carbon dioxide capture

Cited by 13 publications

References 56 publications

Hierarchically Nanoporous Carbon for CO2 Capture and Separation: Roles of Morphology, Porosity, and Surface Chemistry

Hierarchically Nanoporous Carbon for CO2 Capture and Separation: Roles of Morphology, Porosity, and Surface Chemistry

CuCl2-Activated Sustainable Microporous Carbons with Tailorable Multiscale Pores for Effective CO2 Capture

Biomass-Derived N/O/P Tri-Doped Hierarchically Porous Carbon with a Wider Potential Window for Flexible Energy Storage Devices

Contact Info

Product

Resources

About

Hierarchically Nanoporous Carbon for CO₂ Capture and Separation: Roles of Morphology, Porosity, and Surface Chemistry

Hierarchically Nanoporous Carbon for CO₂ Capture and Separation: Roles of Morphology, Porosity, and Surface Chemistry

CuCl₂-Activated Sustainable Microporous Carbons with Tailorable Multiscale Pores for Effective CO₂ Capture