Insight into specific surface area, microporosity and N, P co-doping of porous carbon materials in the acetone adsorption

Porous carbon materials derived from biopolymers are attractive sorbents for the removal of emerging pollutants from water, due to their high specific surface area, high porosity, tunable surface chemistry, and reasonable cost. However, carrageenan biopolymers were scarcely investigated as a carbon source to prepare porous carbon materials. Herein, hydrochars (HCs) and porous activated carbons (ACs) derived from natural occurring polysaccharides with variable sulfate content (κ-, ι- and λ-carrageenan) were prepared and investigated in the uptake of ciprofloxacin, which is an antibiotic detected in water sources and that poses serious hazards to public health. The materials were prepared using hydrothermal carbonization and subsequent chemical activation with KOH to increase the available surface area. The activated carbons were markedly microporous, presenting high specific surface area, up to 2800 m2/g. Activated carbons derived from κ- and λ-carrageenan showed high adsorption capacity (422 and 459 mg/g, respectively) for ciprofloxacin and fast adsorption kinetics, reaching the sorption equilibrium in approximately 5 min. These features place the ACs investigated here among the best systems reported in the literature for the removal of ciprofloxacin from water.

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Ring-Opening Metathesis Polymerization Derived Hierarchically Porous Carbon-Foams

10.26434/chemrxiv.11674041 ◽

2020 ◽

Author(s):

Sebastijan Kovačič ◽

Nadejda B. Matsko ◽

Katharina Gruber ◽

Stefan Koller ◽

Christian Slugovc

Keyword(s):

Specific Surface ◽

Carbon Content ◽

Surface Area ◽

Specific Surface Area ◽

Porous Carbon ◽

Ring Opening ◽

Carbon Materials ◽

Electronic Conductivity ◽

Internal Phase ◽

Carbon Foams

Monolithic open macroporous carbons of 80-85 % porosity are obtained from pyrolyzing oxidized high internal phase templated poly(dicyclopentadiene) foams. The macropores void diameters of the resulting carbon foams can be ajusted between 87 and 2.5 mikrometer simply by changing the surfactant amount used in the preparation of the precursor foams. The resulting porous carbon materials are charcterized by a carbon content >97%, an electronic conductivity of up to 2800 S/m, a Young's modulus of up to 2.1 GPa and a specific surface area of up to 1200 m2/g.

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Ring-Opening Metathesis Polymerization Derived Hierarchically Porous Carbon-Foams

10.26434/chemrxiv.11674041.v1 ◽

2020 ◽

Cited By ~ 1

Author(s):

Sebastijan Kovačič ◽

Nadejda B. Matsko ◽

Katharina Gruber ◽

Stefan Koller ◽

Christian Slugovc

Keyword(s):

Specific Surface ◽

Carbon Content ◽

Surface Area ◽

Specific Surface Area ◽

Porous Carbon ◽

Ring Opening ◽

Carbon Materials ◽

Electronic Conductivity ◽

Internal Phase ◽

Carbon Foams

Monolithic open macroporous carbons of 80-85 % porosity are obtained from pyrolyzing oxidized high internal phase templated poly(dicyclopentadiene) foams. The macropores void diameters of the resulting carbon foams can be ajusted between 87 and 2.5 mikrometer simply by changing the surfactant amount used in the preparation of the precursor foams. The resulting porous carbon materials are charcterized by a carbon content >97%, an electronic conductivity of up to 2800 S/m, a Young's modulus of up to 2.1 GPa and a specific surface area of up to 1200 m2/g.

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Preparation of highly porous carbon from sustainable α-cellulose for superior removal performance of tetracycline and sulfamethazine from water

RSC Advances ◽

10.1039/c6ra00277c ◽

2016 ◽

Vol 6 (33) ◽

pp. 28023-28033 ◽

Cited By ~ 24

Author(s):

Jinsong He ◽

Jiangdong Dai ◽

Tao Zhang ◽

Jun Sun ◽

Atian Xie ◽

...

Keyword(s):

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Porous Carbon ◽

Carbon Materials ◽

Koh Activation ◽

Effective Removal ◽

Hierarchical Carbon ◽

Highly Porous

Hierarchical carbon materials with ultrahigh specific surface area were synthesized by KOH activation from sustainable α-cellulose and employed as adsorbents for the effective removal of tetracycline (TC) and sulfamethazine (SMZ) from water.

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KCl-assisted activation: Moringa oleifera branch-derived porous carbon for high performance supercapacitor

New Journal of Chemistry ◽

10.1039/d1nj00046b ◽

2021 ◽

Vol 45 (12) ◽

pp. 5712-5719

Author(s):

Yongxiang Zhang ◽

Peifeng Yu ◽

Mingtao Zheng ◽

Yong Xiao ◽

Hang Hu ◽

...

Keyword(s):

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Porous Carbon ◽

High Performance ◽

Moringa Oleifera ◽

High Specific Surface Area ◽

Porous Carbons

Porous carbons with a high specific surface area (2314–3470 m2 g−1) are prepared via a novel KCl-assisted activation strategy for high-performance supercapacitor.

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Effect of Air Oxidation on Texture, Surface Properties and Dye Adsorption of Wood-Derived Porous Carbon Materials

Materials ◽

10.3390/ma12101675 ◽

2019 ◽

Vol 12 (10) ◽

pp. 1675 ◽

Cited By ~ 1

Author(s):

Suhong Ren ◽

Liping Deng ◽

Bo Zhang ◽

Yafang Lei ◽

Haiqing Ren ◽

...

Keyword(s):

Surface Area ◽

Functional Groups ◽

Porous Carbon ◽

Carbon Materials ◽

Dye Adsorption ◽

Carbon Surface ◽

Air Oxidation ◽

Activation Temperature ◽

Porous Carbon Materials ◽

Hierarchical Porous

Hierarchical porous carbon materials made from cork were fabricated using a facile and green method combined with air activation, without any templates and chemical agents. The influence of air activation on the texture and other surface characteristics of the carbon materials were evaluated by various characterization techniques. Results indicate that air oxidation can effectively improve the surface area and the hierarchical porous structure of carbon materials, as well as increase the number of oxygen-containing functional groups on the carbon surface. The specific surface area and the pore volume of the carbon material activated by air at 450 °C (C800-M450) can reach 580 m2/g and 0.379 cm3/g, respectively. These values are considerably higher than those for the non-activated material (C800, 376 m2/g, 0.201 cm3/g). The contents of the functional groups (C–O, C=O and O–H) increased with rising activation temperature. After air activation, the adsorption capacity of the carbon materials for methylene blue (MB) and methyl orange (MO) was increased from 7.7 and 6.4 mg/g for C800 to 312.5 and 97.1 mg/g for C800-M450, respectively. The excellent dye removal of the materials suggests that the porous carbon obtained from biomass can be potentially used for wastewater treatment.

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Increase the Microporosity and CO2 Adsorption of a Commercial Activated Carbon

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.749.17 ◽

2015 ◽

Vol 749 ◽

pp. 17-21 ◽

Cited By ~ 2

Author(s):

Joanna Sreńscek Nazzal ◽

Karolina Glonek ◽

Jacek Młodzik ◽

Urszula Narkiewicz ◽

Antoni W. Morawski ◽

...

Keyword(s):

Activated Carbon ◽

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Carbon Materials ◽

Micropore Volume ◽

Microporous Carbon ◽

Microporous Carbons ◽

Adsorption Capacities

Microporous carbons prepared from commercial activated carbon WG12 by KOH and/or ZnCl2 treatment were examined as adsorbents for CO2 capture. The micropore volume and specific surface area of the resulting carbons varied from 0.52 cm3/g (1374 m2/g) to 0.70 cm3/g (1800 m2/g), respectively. The obtained microporous carbon materials showed high CO2 adsorption capacities at 40 bar pressure reaching 16.4 mmol/g.

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Preparation of Fe/N co-doped hierarchical porous carbon nanosheets derived from chitosan nanofibers for high-performance supercapacitors

Journal of Electrochemical Energy Conversion and Storage ◽

10.1115/1.4052316 ◽

2021 ◽

pp. 1-16

Author(s):

Yaqi Yang ◽

Ziqiang Shao ◽

Feijun Wang

Keyword(s):

Specific Surface ◽

Specific Capacitance ◽

Surface Area ◽

Double Layer ◽

Specific Surface Area ◽

Porous Carbon ◽

Active Sites ◽

Transport Pathway ◽

Carbon Nanosheets ◽

Hierarchical Porous

Abstract Due to the low specific capacitance and small specific surface area of conventional carbon materials used as electrode materials for double-layer capacitors, the search for more ideal materials and ingenious preparation methods remains a major challenge. In this study, fractional porous carbon nanosheets were prepared by co-doping Fe and N with chitosan as nitrogen source. The advantage of this method is that the carbon nanosheets can have a large number of pore structures and produce a large specific surface area. The presence of Fe catalyzes the graphitization of carbon in the carbon layer during carbonization process, and further increases the specific surface area of the electrode material. This structure provides an efficient ion and electron transport pathway, which enables more active sites to participate in the REDOX reaction, thus significantly enhancing the electrochemical performance of SCs. The specific surface area of CS-800 is up to 1587 m2 g−1. When the current density is 0.5 A g−1, the specific capacitance of CS-800 reaches 308.84 F g−1, and remains 84.61 % of the initial value after 10,000 cycles. The Coulomb efficiency of CS-800 is almost 100 % after a long cycle, which indicates that CS-800 has more ideal double-layer capacitance and pseudo capacitance.

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Dopamine Assisted One-Step Pyrolysis of Glucose for the Preparation of Porous Carbon with A High Surface Area

Nanomaterials ◽

10.3390/nano8100854 ◽

2018 ◽

Vol 8 (10) ◽

pp. 854 ◽

Cited By ~ 2

Author(s):

Hanbo Xiao ◽

Cheng-an Tao ◽

Yujiao Li ◽

Xianzhe Chen ◽

Jian Huang ◽

...

Keyword(s):

Surface Area ◽

Porous Carbon ◽

Carbon Materials ◽

High Current Density ◽

High Surface ◽

High Surface Area ◽

Energy Storage Materials ◽

One Pot ◽

Component Structure ◽

Porous Carbon Materials

Herein, a facile dopamine assisted one-pot synthesis approach is proposed for the preparation of porous carbon with a specific surface area (SSA) up to 2593 m2/g through the direct pyrolysis of a mixture of glucose, NH4Cl, and dopamine hydrochloride (DAH). The glucose is adopted as the carbon source and foaming agent, NH4Cl is used as the blowing agent, and DAH is served as collaborative carbon precursor as well as the nitrogen source for the first time. The effect of dopamine on the component, structure, and SSA of the as-prepared porous carbon materials are systematically studied. The moderate addition of dopamine, which influences the condensation and polymerization of glucose, matches better with ammonium salt decomposition. The SSA of porous carbon increases first and then decreases with the increasing amount of dopamine. In our case, the porous carbon produced with 5 wt% dopamine (PC-5) achieves the maximum SSA of up to 2593 m2/g. Accordingly, it also shows the greatest electrochemical performance. The PC-5 shows a capacitance of 96.7 F/g calculated from the discharge curve at 1 A/g. It also has a good capacitive rate capacity, the specific capacitance can still maintain 80%, even at a high current density of 10 A/g. Moreover, PC-5 exhibits a good cycling stability of 98.1% capacitive retention after 1000 cycles. The proposed method may show promising prospects for preparing porous carbon materials as advanced energy storage materials, storage, and catalyst supports.

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