一氧化碳在改性介孔二氧化硅上的吸附：吸附位点的作用。
CO Adsorption on Modified Mesoporous Silicas: The Role of the Adsorption Sites.
作者信息
Ravutsov Martin, Mitrev Yavor, Shestakova Pavletta, Lazarova Hristina, Simeonov Svilen, Popova Margarita
机构信息
Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev St., bl. 9, 1113 Sofia, Bulgaria.
Faculty of Pharmacy, Research Institute for Medicines (iMed.ULisboa), Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal.
出版信息
Nanomaterials (Basel). 2021 Oct 25;11(11):2831. doi: 10.3390/nano11112831.
The post-synthesis procedure for cyclic amine (morpholine and 1-methylpiperazine) modified mesoporous MCM-48 and SBA-15 silicas was developed. The procedure for preparation of the modified mesoporous materials does not affect the structural characteristics of the initial mesoporous silicas strongly. The initial and modified materials were characterized by XRD, N physisorption, thermal analysis, and solid-state NMR. The CO adsorption of the obtained materials was tested under dynamic and equilibrium conditions. The NMR data revealed the formation of different CO adsorbed forms. The materials exhibited high CO absorption capacity lying above the benchmark value of 2 mmol/g and stretching out to the outstanding 4.4 mmol/g in the case of 1-methylpiperazin modified MCM-48. The materials are reusable, and their CO adsorption capacities are slightly lower in three adsorption/desorption cycles.
开发了用于环胺（吗啉和1-甲基哌嗪）改性介孔MCM-48和SBA-15二氧化硅的合成后程序。制备改性介孔材料的程序对初始介孔二氧化硅的结构特征影响不大。通过XRD、N物理吸附、热分析和固态NMR对初始材料和改性材料进行了表征。在动态和平衡条件下测试了所得材料的CO吸附。NMR数据揭示了不同CO吸附形式的形成。这些材料表现出高CO吸收容量，高于2 mmol/g的基准值，在1-甲基哌嗪改性MCM-48的情况下，高达出色的4.4 mmol/g。这些材料可重复使用，并且在三个吸附/解吸循环中它们的CO吸附容量略有降低。
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