石墨烯纳米片对芳香族有机污染物的吸附：与碳纳米管和活性炭的比较。
Adsorption of aromatic organic contaminants by graphene nanosheets: comparison with carbon nanotubes and activated carbon.
机构信息
Department of Environmental Engineering and Earth Sciences, Clemson University, 342 Computer Court, Anderson, SC 29625, USA.
出版信息
Water Res. 2013 Mar 15;47(4):1648-54. doi: 10.1016/j.watres.2012.12.031. Epub 2012 Dec 28.
Adsorption of two synthetic organic compounds (SOCs; phenanthrene and biphenyl) by two pristine graphene nanosheets (GNS) and one graphene oxide (GO) was examined and compared with those of a coal base activated carbon (HD4000), a single-walled carbon nanotube (SWCNT), and a multi-walled carbon nanotube (MWCNT) in distilled and deionized water and in the presence of natural organic matter (NOM). Graphenes exhibited comparable or better adsorption capacities than carbon nanotubes (CNTs) and granular activated carbon (GAC) in the presence of NOM. The presence of NOM reduced the SOC uptake of all adsorbents. However, the impact of NOM on the SOC adsorption was smaller on graphenes than CNTs and activated carbons. Furthermore, the SOC with its flexible molecular structure was less impacted from NOM preloading than the SOC with planar and rigid molecular structure. The results indicated that graphenes can serve as alternative adsorbents for removing SOCs from water. However, they will also, if released to environment, adsorb organic contaminants influencing their fate and impact in the environment.
两种合成有机化合物（SOCs；菲和联苯）在两种原始石墨烯纳米片（GNS）和一种氧化石墨烯（GO）上的吸附情况，并与在蒸馏水中和去离子水中以及在天然有机物（NOM）存在下的煤基活性炭（HD4000）、单壁碳纳米管（SWCNT）和多壁碳纳米管（MWCNT）的吸附情况进行了比较。在 NOM 存在下，石墨烯表现出与碳纳米管（CNTs）和颗粒活性炭（GAC）相当或更好的吸附能力。NOM 的存在降低了所有吸附剂对 SOC 的吸收。然而，与 CNTs 和活性炭相比，NOM 对 SOC 吸附的影响在石墨烯上较小。此外，具有灵活分子结构的 SOC 比具有平面和刚性分子结构的 SOC 受 NOM 预加载的影响更小。结果表明，石墨烯可以作为从水中去除 SOCs 的替代吸附剂。然而，如果它们被释放到环境中，它们也会吸附有机污染物，影响它们在环境中的命运和影响。
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