Synthesis, characterisation and carbon dioxide capture capacities of hierarchically porous Starbons^®

TY - JOUR

T1 - Synthesis, characterisation and carbon dioxide capture capacities of hierarchically porous Starbons®

AU - Li, Han

AU - Li, Cheng

AU - Budarin, Vitaliy L.

AU - Clark, James H.

AU - North, Michael

AU - Wang, Jinxiu

AU - Wu, Xiao

N1 - © The Royal Society of Chemistry 2022. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

PY - 2022/2/21

Y1 - 2022/2/21

N2 - The synthesis of hierarchically porous Starbon® based materials from initially highly mesoporous Starbons® is reported. Mesoporous starbons® are prepared from three different biopolymers: starch, alginic acid and pectin and each is then activated using three different activating agents: potassium hydroxide, carbon dioxide and oxygen to give a set of hierarchically porous Starbons® which retain the mesopores of the precursor whilst becoming predominantly microporous. The hierarchically porous materials are characterised using nitrogen porosimetry, CHN analysis, ICP-OES, XPS, SEM and TEM imaging. It is shown that the hierarchically porous Starbons® have higher carbon dioxide adsorption capacities than either the mesoporous Starbon® precursors or conventional microporous activated carbon. The materials show selectivities of up to 64 for adsorption of carbon dioxide versus nitrogen and only lose only 3-7% of their carbon dioxide adsorption capacities when the carbon dioxide is saturated with water. The carbon dioxide capture capacity of all 50 Starbon® materials showed a strong and positive linear correlation with the product of the materials ultramicropore surface area and ratio of ultramicropore (0.4-0.7 nm) volume to total pore volume.

AB - The synthesis of hierarchically porous Starbon® based materials from initially highly mesoporous Starbons® is reported. Mesoporous starbons® are prepared from three different biopolymers: starch, alginic acid and pectin and each is then activated using three different activating agents: potassium hydroxide, carbon dioxide and oxygen to give a set of hierarchically porous Starbons® which retain the mesopores of the precursor whilst becoming predominantly microporous. The hierarchically porous materials are characterised using nitrogen porosimetry, CHN analysis, ICP-OES, XPS, SEM and TEM imaging. It is shown that the hierarchically porous Starbons® have higher carbon dioxide adsorption capacities than either the mesoporous Starbon® precursors or conventional microporous activated carbon. The materials show selectivities of up to 64 for adsorption of carbon dioxide versus nitrogen and only lose only 3-7% of their carbon dioxide adsorption capacities when the carbon dioxide is saturated with water. The carbon dioxide capture capacity of all 50 Starbon® materials showed a strong and positive linear correlation with the product of the materials ultramicropore surface area and ratio of ultramicropore (0.4-0.7 nm) volume to total pore volume.

UR - http://www.scopus.com/inward/record.url?scp=85125774935&partnerID=8YFLogxK

U2 - 10.1039/D1GC03715C

DO - 10.1039/D1GC03715C

M3 - Article

AN - SCOPUS:85125774935

SN - 1463-9270

VL - 24

SP - 1545

EP - 1560

JO - Green Chemistry

JF - Green Chemistry

IS - 4

ER -