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The good quality MCM-41 materials were synthesized using tetraethoxysilane (TEOS) as silica source and C10 and C16 alkyltrimethylammonium bromide surfactants as templates. It is shown that the extension of time of the hydrothermal treatment process could be beneficial for improving the quality of the resulting MCM-41 samples. This approach seems to be especially useful for synthesis of the MCM-41...
The ά(s)-plot method used usually to analyze the gas adsorption data is applied for the first time to study adsorption of water vapor on unmodified and oxidized active carbons. This method seems to be useful for characterizing surface properties of active carbons and monitoring changes in these properties introduced during oxidation processes. It was shown that alfa(s)-plot analysis supports the concept...
Adsorption isotherms of water vapor measured on unmodified and strongly oxidized active carbons at 298 K were analyzed by using different isotherm equations. It was shown that the wellknown Dubinin-Serpinsky equations fail to describe adsorption isotherms of water vapor on strongly oxidized active carbons. However these isotherms can be well described by equations of the theory of the micropore volume...
The well-known Dubinin-Radushkevich (DR) and Langmuir-Freundlich (LF) isotherm equations were used to predict adsorption of benzene and chloroform from dilute aqueous solutions on active carbons by using the gas-solid adsorption parameters and the interfacial similarity coefficient. This coefficient was evaluated as the ratio of the structural parameters for the liquid-solid and gas-solid interfaces...
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