Korea CCS R&D Center, Korea Institute of Energy Research, Yuseoung-gu, Daejeon, South Korea.
J Colloid Interface Sci. 2012 Nov 15;386(1):285-90. doi: 10.1016/j.jcis.2012.07.025. Epub 2012 Jul 16.
Thermally exfoliated graphene nanoplates were found to be a novel high efficiency sorbent for the capture of CO(2). The exfoliated graphene nanoplates were expanded successfully from graphite oxide by a low-heat treatment at temperatures ranging from 150 to 400°C under vacuum conditions. The texture was analyzed by N(2) full isotherms and XRD. The CO(2) capture characteristics of the graphene nanoplates at 25°C and 30 bar were examined using a pressure-composition-temperature apparatus. The inter-layer spacing of the graphene layers and pore structure on the CO(2) capture capacities were studied as a function of the processing conditions. The prepared graphene nanoplates exhibited high capture capacities, up to 248 wt.%, at 25°C and 30 bar. The improved CO(2) capture capacity of the graphene nanoplates was attributed to the larger inter-layer spacing and higher interior void volume.
热剥离石墨烯纳米片被发现是一种新型的高效吸附剂，可用于捕获 CO(2)。通过在真空条件下将温度从 150°C 到 400°C 的低热处理，成功地从氧化石墨中扩展出剥离的石墨烯纳米片。通过 N(2)全等温线和 XRD 分析了其结构。使用压力-组成-温度装置研究了 25°C 和 30 巴下石墨烯纳米片的 CO(2)捕获特性。作为处理条件的函数，研究了石墨烯层的层间间距和孔结构对 CO(2)捕获容量的影响。制备的石墨烯纳米片在 25°C 和 30 巴时表现出高达 248wt%的高捕获容量。石墨烯纳米片提高的 CO(2)捕获能力归因于更大的层间间距和更高的内部空隙体积。
