Abstract：
New shape-selectivity of graphene-based materials was discovered on this article. To explore the new selectivity, the structure and surface state of graphene and carbon nanotube were examined firstly, and their specific selectivity was verified and was compared with that of ZSM-5 zeolite in aqueous solutions of tobacco specific nitrosamines (TSNA) along with dyes. These two adsorbents trapped about 55% and 70% of 4-methylnitrosamino-1-3-pyridyl-1-butanone (NNK) but only 3% of N\'-nitrosonornicotine (NNN) in solution, having an obvious selectivity for the former, due to its stronger interaction with graphene. NNK on graphene sheet obtained more electrons (0.015 e) and owned larger adsorption energy (15.63 kcal mol-1) than that of NNN (0.003 e, 9.19 kcal mol-1), according to theoretical calculation and FTIR results. More 95 or 136 mg g -1 acid red 88 than methyl orange was captured by graphene or carbon nanotube, demonstrating this special and abnormal selectivity again. With new selectivity, graphene showed a higher capacity (6.9%) and shorter adorption equilibrium time (5 min) for TSNA than the typical selecive sorbent ZSM-5 zeolite (1.7% and 20 min) in tobacco solution but kept the similar selctivity to NNK, paving a new way to control the carcinogens like TSNA in environment.
摘要：
本文发现了基于石墨烯的材料的新形状选择性。探索新的选择性，首先考察了石墨烯和碳纳米管的结构和表面状态,并验证了它们的特定选择性，并将其与ZSM-5沸石在烟草特定亚硝胺（TSNA）和染料的水溶液中的选择性进行了比较。这两种吸附剂在溶液中捕获了约55％和70％的4-甲基亚硝胺-1-3-吡啶基-1-丁酮（NNK），但只有3％的N'-亚硝基烟碱（NNN），对前者有明显的选择性，由于其与石墨烯的相互作用更强。与NNN相比，石墨烯片上的NNK获得了更多的电子（0.015e）并拥有更大的吸附能（15.63kcalmol-1）（0.003e，9.19千卡摩尔-1)，根据理论计算和FTIR结果。石墨烯或碳纳米管捕获了比甲基橙更多的95或136mgg-1酸红88，再次证明了这种特殊和异常的选择性。有了新的选择性，在烟草溶液中，石墨烯显示出比典型的选择性吸附剂ZSM-5沸石（1.7％和20分钟）更高的TSNA容量（6.9％）和更短的吸附平衡时间（5分钟），但保持与NNK相似的选择性，为环境中TSNA等致癌物质的控制提供了新的途径。
