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Degradation product analysis from the photocatalytic oxidation/reduction of 2,4-dichlorophenol in the presence of mesoporous silica encapsulated TiO2 particles and TiO2 dispersions (presentation)
Citation:
ADAMS, W. AND M. BAKKER. Degradation product analysis from the photocatalytic oxidation/reduction of 2,4-dichlorophenol in the presence of mesoporous silica encapsulated TiO2 particles and TiO2 dispersions (presentation). Presented at ACS National Meeting, New Orleans, LA, April 06 - 10, 2008.
Impact/Purpose:
to inform the public
Description:
Thin films of Degussa P-25 TiO2 encapsulated in an SBA-15 mesoporous silica matrix were prepared. The TiO2/SBA-15 thin film structure was verified using transmission electron microscopy (TEM) and small angle X-ray diffraction (XRD). During irradiation with 350 nm light, the TiO2/SBA-15 thin films have been shown to successfully photodegrade 2,4-dichlorophenol (2,4-DCP), an industrial pollutant. For this study, the 2,4-DCP degradation products/intermediates were characterized using chromatographic/mass spectrometry techniques. The degradation product kinetics and pathways were also explored. Aqueous solutions of 2,4-DCP in the presence of Degussa P-25 TiO2 dispersions and in the presence of TiO2/SBA-15 thin films were compared. The comparisons included pH analysis and degradation pathway determination.