Determination of surface properties and Gutmann’s Lewis acidity–basicity parameters of thiourea and melamine polymerized graphitic carbon nitride sheets by inverse gas chromatography

2018 ◽  
Vol 1580 ◽  
pp. 134-141 ◽  
Author(s):  
T.V.M. Sreekanth ◽  
Praveen Kumar Basivi ◽  
P.C. Nagajyothi ◽  
G.R. Dillip ◽  
J. Shim ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Surface Properties ◽  
Carbon Nitride ◽  
Inverse Gas Chromatography ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Lewis Acidity

Inverse gas chromatographic characterization of Porapak Q as an extractant of pollutants from aqueous media

2009 ◽  
Vol 63 (3) ◽  
Author(s):  
Nagy Moustafa ◽  
Doaa El-Desouki
Keyword(s):  
Gas Chromatography ◽  
Chemical Structure ◽  
Inverse Gas Chromatography ◽  
Aqueous Media ◽  
Lewis Acidity ◽  
Porapak Q ◽  
Chromatographic Characterization ◽  
Surface Lewis Acidity

AbstractThe surface of Porapak Q was characterized by inverse gas chromatography (IGC) carried out by the determination of dispersive and specific adsorption components of Porapak Q surface, calculating γsd and -ΔH as parameters, respectively. An interpretation was given based on the chemical structure of Porapak Q. The obtained results were confirmed through the surface Lewis acidity and basicity constants, K a and K b, respectively, correlating well with the determined thermodynamic parameters.

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