Citation:
ZHOU Liangqin, FU Dayou, YUAN Dong, FAN Jinlong, TAN Wenyuan. Surface properties of ZnMgAl hydrotalcite-like compounds by inverse gas chromatography[J]. Chinese Journal of Chromatography,
;2015, 33(1): 96-100.
doi:
10.3724/SP.J.1123.2014.07032
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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.
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