Tang Jing, Torad Nagy L, Salunkhe Rahul R, Yoon Jang-Hee, Al Hossain Md Shahriar, Dou Shi Xue, Kim Jung Ho, Kimura Tatsuo, Yamauchi Yusuke
World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan) http://www.yamauchi-labo.com/; Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555 (Japan).
Chem Asian J. 2014 Nov;9(11):3238-44. doi: 10.1002/asia.201402629. Epub 2014 Sep 11.
A recent study on nanoporous carbon based materials (J. Am. Chem. Soc. 2012, 134, 2864) showed that the presence of abundant graphitized sp(2) carbon species in the frameworks led to higher affinity for aromatic hydrocarbons than their aliphatic analogues. Herein, improved understanding of the sensitive and selective detection of aromatic substances by using mesoporous carbon (MPC)-based materials, combined with a quartz crystal microbalance (QCM) sensor system, was obtained. MPCs were synthesized by direct carbonization of mesoporous polymers prepared from resol through a soft templating approach with Pluronic F127. The carbon-based frameworks can be graphitized through the addition of a cobalt source to the precursor solution, according to the catalytic activity of the cobalt nanoparticles formed during the carbonization process. From the Raman data, the degree of the graphitization was clearly increased by increasing the cobalt content and elevating the carbonization temperature. From a QCM study, it was proved that the highly graphitized MPCs exhibited a higher affinity for aromatic hydrocarbons than their aliphatic analogues. By increasing the degree of graphitization in the carbon-based pore walls, the MPCs showed both larger adsorption uptake and faster sensor response towards toxic benzene and toluene vapors.
最近一项关于纳米多孔碳基材料的研究（《美国化学会志》，2012年，第134卷，第2864页）表明，骨架中大量石墨化的sp(2) 碳物种的存在使其对芳烃的亲和力高于其脂肪族类似物。在此，结合石英晶体微天平（QCM）传感器系统，我们对基于介孔碳（MPC）的材料对芳香族物质的灵敏且选择性检测有了更深入的了解。MPC是通过以间苯二酚为原料，采用软模板法与Pluronic F127制备介孔聚合物，然后直接碳化合成的。根据碳化过程中形成的钴纳米颗粒的催化活性，通过向前驱体溶液中添加钴源，可以使碳基骨架石墨化。从拉曼数据可知，通过增加钴含量和提高碳化温度，石墨化程度明显提高。通过QCM研究证明，高度石墨化的MPC对芳烃的亲和力高于其脂肪族类似物。通过提高碳基孔壁的石墨化程度，MPC对有毒的苯和甲苯蒸汽表现出更大的吸附量和更快的传感器响应。
