A gas-chromatography study of adsorption properties of silica modified by stable nickel nanoparticles obtained in reverse micelles under gamma-radiation

作者：Belyakova L D^*; Gornostaeva S V; Pavlova N A; Larionov O G; Revina A A; Bulanova A V

来源：Protection of Metals, 2008, 44(2): 164-169.

DOI：10.1134/S0033173208020094

Stable nano-sized nickel particles are prepared using the radiation-chemical synthesis in reverse micelles. Adsorption properties of raw silica (silochrome, S-120), the silochrome modified by a micelle-forming compound (AOT), and the silochrome modified by the nano-sized nickel particles are studied using gas chromatography method. The retention times for different test-compounds at different temperatures are determined for these adsorbents. Specific retention volumes of the test-compounds, as well as the thermodynamic adsorption characteristics, are determined. After the modification, the initial adsorption heat for n-hydrocarbons increases, which points out to the higher surface roughness of the modified samples. For the nickel-nanoparticle-modified silica, the contribution of specific interactions of polar compounds is less than that for the unmodified silica; this can be explained by screening the active centers (OH-groups) of the silica gel by the metal nanoparticles. The silica polarity decreases after the modification. The gas chromatography method allows detecting the difference in the properties of nanocomposites containing Ni- and NiO-nanoparticles.

• 出版日期2008-4
• 单位北京化工大学