An approach for quantitative analysis of pore size distribution of silica gel using atomic force microscopy
An approach for quantitative analysis of pore size distribution of silica gel using atomic force microscopy
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DOI：
10.1016/j.ijrefrig.2018.08.017
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发表时间：
2019-09
影响因子：
3.9
通讯作者：
M. Palash;S. Mitra;S. Harish;K. Thu;B. Saha
中科院分区：
文献类型：
--
作者：
M. Palash;S. Mitra;S. Harish;K. Thu;B. Saha
本文讨论了一种直接的方法来评估不规则形状的多孔材料的孔隙分布，使用原子力显微镜（AFM）。利用原子力显微镜，采用轻敲模式，获得吸附应用中常用的多孔材料的表面形貌信息。三种不同类型的硅胶，商业上使用的二氧化硅-氧化铝和对乙酰氨基酚样品进行了研究，使用图像处理技术，以捕捉孔径相关的信息。将指定区域中的大孔和中孔可视化，然后使用2-D快速傅立叶变换（2D FFT）技术进行定量和计数。然后将通过AFM技术获得的结果与从N2吸附等温线提取的BET表面积和孔径分布（NLDFT）进行比较。
This article discusses a direct approach for assessing irregularly shaped pore distribution of porous materials using Atomic Force Microscopy (AFM). Using the tapping mode, AFM is employed to obtain the surface topographic information of the porous materials commonly used in adsorption applications. Three different types of silica gels, commercially used silica–alumina and acetaminophen samples are investigated using an image processing technique to capture the pore size-related information. Macro and mesopores in a specified region are visualized then quantified and counted using 2-D Fast Fourier Transformation (2D FFT) technique. The results obtained by the AFM technique are then compared with the BET surface area and pore size distribution (NLDFT) extracted from the N2adsorption isotherms.