Use of Combined Ion-exclusion and Cation-exchange Chromatography to Study Photooxidation of Ionic Nitrogen Compounds on a Titanium Dioxide Photocatalyst
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چکیده
Combined ion-exclusion and cation-exchange chromatography (IEC/CEC) on a weakly acidic cation-exchange resin in the H-form (TSKgel Super IC-A/C) has been used as an advanced method for evaluation of the photooxidation of ionic nitrogen compounds, for example triethanolamine, trimethylamine, and urea, on a TiO2 photocatalyst. Formation of NH4 and NO3 from each nitrogen compound by photooxidation on the catalyst during UV irradiation was successfully monitored by use of IEC/CEC under optimized mobile-phase conditions (6 mM tartaric acid and 3 mM 18-crown-6). It was found that the products formed depended on whether or not a molecule contained a hydroxylated nitrogen moiety or other hydroxyl group.
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تاریخ انتشار 2006