Chinese Journal of Chromatography ›› 2015, Vol. 33 ›› Issue (1): 96-100.DOI: 10.3724/SP.J.1123.2014.07032

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Surface properties of ZnMgAl hydrotalcite-like compounds by inverse gas chromatography

ZHOU Liangqin1, FU Dayou1, YUAN Dong2, FAN Jinlong1, TAN Wenyuan1   

  1. 1. Analysis and Testing, Sichuan University of Science & Engineering, Zigong 643000, China;
    2. College of Materials and Chemical Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
  • Received:2014-07-21 Revised:2014-09-02 Online:2015-01-08 Published:2014-12-26

Abstract:

The structure of ZnMgAl hydrotalcite-like compounds (ZnMgAl-HTLC) prepared by hydrothermal synthesis was studied by X-ray diffraction (XRD). With a series of polar and non-polar molecules as probes, inverse gas chromatography (IGC) was used to measure the surface properties of ZnMgAl-HTLC. It was found that the XRD pattern of ZnMgAl-HTLC was narrow, sharp and high. The results showed that ZnMgAl-HTLC with a higher purity was obtained by hydrothermal synthesis. The surface adsorption free energy was less than zero. The surface dispersive free energy was 6.02mJ/m2. The acid-base interaction free energy was 5.33 kJ/mol. The adsorption enthalpy was 43.6 kJ/mol, and the adsorption entropy was 0.15 kJ/mol. The IGC method is significant in the study of the surface properties of ZnMgAl-HTLC.

Key words: inverse gas chromatography (IGC), surface properties, ZnMgAl hydrotalcite-like compounds (ZnMgAl-HTLC)

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