Probing mesopore connectivity in hierarchical nanoporous materials
Probing mesopore connectivity in hierarchical nanoporous materials
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DOI：
10.1016/j.carbon.2012.06.004
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发表时间：
2012-11
期刊：
影响因子：
10.9
通讯作者：
T. Kirchner;A. Shakhov;Philipp Zeigermann;R. Valiullin;J. Kärger
中科院分区：
文献类型：
--
作者：
T. Kirchner;A. Shakhov;Philipp Zeigermann;R. Valiullin;J. Kärger
评价在微孔基质中形成的中孔的连通性对于广泛的应用是重要的。在这项工作中，我们提出了一个实验研究的运输正己烷和硝基苯在商业活性炭材料含有有目的地引入中孔。扩散系数和扩散活化能的实验结果，如使用脉冲场梯度技术的NMR，证实了孔结构的信息，从吸附等温线测量结果，并明确地表明所形成的中孔网络的材料跨越的连续性，作为一个先决条件的一个无限的运输增强相比，纯微孔等效。
Assessing connectivity of mesopores formed in microporous matrices is of importance for a wide range of applications. In this work we present an experimental study of the transport of n-hexane and nitrobenzene in a commercial activated carbon material containing purposefully introduced mesoporosity. The experimental results on diffusivities and activation energies for diffusion, as obtained using the pulsed field gradient technique of NMR, corroborate the information on pore architecture as resulting from adsorption isotherm measurement and unequivocally demonstrate the material-spanning continuity of the formed mesopore network, as a prerequisite for an unlimited transport enhancement in comparison with the purely microporous equivalent.