结合N2等温吸附线和CO2等温吸附线表征微孔炭材料的孔结构

美国麦克仪器公司研究人员发表最新2D-NLDFT研究进展：结合N2等温吸附线和CO2等温吸附线表征微孔炭材料的孔结构。美国麦克仪器公司的研究人员Jacek Jagiello博士，在CARBON上发表一篇题为Dual gas analysis of microporous carbons using 2D-NLDFT heterogeneous surface model and combined adsorption data of N2 and CO2（http://www.sciencedirect.com/science/article/pii/S0008622315004005）的研究文章，该文章使用我公司最新推出的2D-NLDFT的双等温线模型，对微孔炭材料的孔径分布进行了表征，得到了非常理想的结果，将炭材料的表征研究进一步向前推进。该dual 2D-NLDFT已经嵌入到麦克气体吸附仪的最新软件MiroActive中。

该文章摘要如下：

Knowledge of the pore structure of carbon materialsincluding micropores is crucial for applications such as double layersupercapacitors, gas separation, and other applications requiring high specificsurface area materials. High surface area is always associated with finemicropores. The pore size distribution (PSD) of microporous carbons is usuallyevaluated from nitrogen adsorption isotherms measured at 77 K in the relativepressure range from 10−7 to 1. Due to the very slow gas diffusion into finepores at cryogenic temperatures and low pressures, the adsorption measurementsmay be extremely time consuming and sometimes inaccurate when the adsorptionequilibrium is difficult to achieve during the measurement. In this work, wediscuss an approach in which the carbon PSD is calculated from the combined N2and CO2 data measured in the pressure range from 1 to 760 Torr. Under suchconditions, the diffusion into micropores is usually fast and equilibrationtimes are short for both measurements. In the PSD calculations we use 2D-NLDFTmodels for carbons with heterogeneous surfaces (J. Jagiello and J.P. Olivier,Adsorption19, 2013, 777–783). We show that both isotherms can be fittedsimultaneously with their corresponding models and as a result the unified PSDcan be obtained

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