4.6 Article

Nanostructured micro/mesoporous graphene: removal performance of volatile organic compounds

Journal

RSC ADVANCES
Volume 12, Issue 23, Pages 14570-14577

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ra01275h

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Funding

  1. Incheon Green Environment Support Center of Korea (IGEC)

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This study demonstrates the synthesis of graphene materials with interconnected pore networks and shows their high efficiency in removing volatile organic compounds. The unique structure of the graphene materials has a significant impact on the removal performance.
In this study, we demonstrate an integrated synthesis strategy, which is conducted by the thermochemical process, consisting of pre- and post-activation by thermal treatment and KOH activation for the reduction of graphite oxide. A large number of interconnected pore networks with a micro/mesoporous range were constructed on a framework of graphene layers with a specific surface area of up to 1261 m(2) g(-1). This suggests a synergistic effect of thermally exfoliated graphene oxide (TEGO) on the removal efficiency of volatile organic compounds by generating pore texture with aromatic adsorbates such as benzene, toluene, and o-xylene (denoted as BTX) from an inert gaseous stream concentration of 100 ppm. As a proof of concept, TEGO, as well as pre- and post-activated TEGO, were used as adsorbents in a self-designed BTX gas adsorption apparatus, which exhibited a high removal efficiency of up to 98 +/- 2%. The distinctive structure of TEGO has a significant effect on removal performance, which will greatly facilitate the strategy of efficient VOC removal configurations.

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