Yun, Sol Lee, Hyunjoo Lee, Wang-Eun Park, Ho Seok 2024-01-20T04:02:13Z 2024-01-20T04:02:13Z 2021-09-05 2016-06-15 0016-2361 https://pubs.kist.re.kr/handle/201004/123963 The porous graphene-based materials are regarded as a promising adsorbent for the adsorption of greenhouse gases such as CO2 and SO2 due to their excellent physical and textural properties, but the adsorption capacity needs to be improved by creating multiscale porosity and large surface area. In this study, we present the synthesis of three-dimensional (3D) ultralight, macro-and micro-porous reduced graphene oxide (m(2)-RGO) monoliths through a self-assembly and steam activation process. Along with 3D macrosopic frameworks, the as-obtained adsorbents possess a ultralow density of 10.4 mg/cm(3), a large specific surface area of > 1600 m(2)/g and a ultrahigh porosity of > 98%, which is suitable for high performance adsorbents. As a consequence of multiscale porosity and good textures, the m(2)-RGO adsorbents exhibit much higher capacities of 6.31 mmol/g and 2.97 mmol/g compared to 2.68 mmol/g and 1.36 mmol/g of 3D macro-porous reduced graphene oxide (m-RGO) for the capture of CO2 and SO2 gases. Moreover, the adsorption kinetics of the m(2)-RGO is much faster than that of commercial RGO powder due to the 3D interconnected macroporous pathways. (c) 2016 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD CARBON OXIDE FRAMEWORKS REDUCTION GAS Multiscale textured, ultralight graphene monoliths for enhanced CO2 and SO2 adsorption capacity Article 10.1016/j.fuel.2016.01.068 1 FUEL, v.174, pp.36 - 42 FUEL 174 36 42 scie scopus 000370530600005 2-s2.0-84957030336 Energy & Fuels Engineering, Chemical Energy & Fuels Engineering Article CARBON OXIDE FRAMEWORKS REDUCTION GAS Adsorption Green house gas Graphene Porous carbon Nanostructure