Heterogeneous catalytic degradation

Filby WG, Mintas M, Gusten H (1981) Heterogeneous catalytic degradation of chlorofluoromethanes on zinc-oxide surfaces. Ber Bunsen Phys Chem 85 189-192 FinkleaHO, 1988. Semiconductor Electrodes. New York Elsevier... 

Al-Ekabi, H. Serpone, N. Kinetic studies in heterogeneous photocatalysis. I. Photo-catalytic degradation of chlorinated phenols in aerated aqueous solutions over Ti02 supported on a glass matrix, J. Phys. Chem. 1988, 92, 5726. 

Homogeneous photochemical and heterogeneous catalytic processes are attractive because they do not increase the volume of secondary waste. Heterogeneous photocatalysis offers the further advantage that, post valence control, any additives such as HAN can be photocatalytically degraded to readily disposable gases such as N2 and C02. This will be explored further in the next section. 

The ester glucuronide (7) of diflunisal was found to be unstable particularly in neutral or basic solution, nine rearrangement or degradation products being detected by reversed-phase ion-pair riPLC. The full paper on heterogeneous catalytic transfer hydro-... 

The use of chitosan-Pd nanocomposites for heterogeneous catalytic reactions is the most extensively studied system and reported in the literature. For example, aUylic substitution reactions of ( )-cinnamyl ethyl carbonate by morpholine was reported by Quignard et al. (2000) using a chitosan-supported palladium complex. Dechlorination reaction of chlorophenol to phenol, degradation of nitrophenol, and reduction of chromate were studied by Vincent et al. (2002, 2003, 2004). Hydrogenation of nitrobenzene to aniline by chitosan-impregnated palladium composites was also reported by Jin et al. (1994). Excellent review of chitosan-based materials used in the heterogeneous catalytic reactions... 

For example, titania-modified mesoporous silicates was synthesized using titanium tetrabutoxide by an impregnation method with variable Si/Ti ratios and applied to the degradation of a dye. A basic dye such as methylene blue was photo-catalytically degraded by titania-modified mesoporous silica under UV irradiation. And these heterogeneous catalysts were also applied to the degradation of organic pollutants such as phenol and toluene [96]. 

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