Synthesis of Surface-Porous Sorbents Based on Silicon Dioxide and Studying Their Adsorption Properties
作者： Zh. V. Faustova , Yu. G. Slizhov , T. N. Matveeva
DOI: 10.1134/S1070427220080145
关键词:
摘要: Sorbents with a layer of silicon dioxide on the surface wide-pore Chromaton N-AW support have been synthesized. The dependence textural characteristics (specific area and pore size) obtained materials amount tetraethoxysilane applied to pH synthesis medium was studied by method low-temperature nitrogen adsorption/desorption. adsorption properties synthesized methods scanning electron microscopy, pH-metry, thermogravimetric analysis, gas chromatography. It found that during sorbents in an acidic medium, samples size 2–4 nm are formed alkaline 13–16 nm. With rise tetraethoxysilane, decrease polarity sorbents, specific heat respect test compounds, number electron-donor sites is observed, while fraction electron-acceptor increases significantly.
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