Comparative studies of structural and surface properties of porous inorganic oxides used in liquid chromatography
نویسنده
چکیده
Structural and surface properties of chromatographic porous silica, alumina, titania and zirconia were studied using thermogravimetry and nitrogen adsorption. The samples studied are mesoporous and exhibit relatively narrow pore size distributions in the range from 10 to 30 nm, making them suitable for chromatographic applications. Low-pressure nitrogen adsorption and thermogravimetry were used to monitor the effects of the thermal treatment on the surface properties of the samples. The observed changes in surface properties caused by treatments at different temperatures were explained in terms of the desorption of physically /chemically adsorbed water, which led to exposure of high energy adsorption sites. 1998 Elsevier Science B.V.
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