Page - 149 - in Advanced Chemical Kinetics

FA-Sep and supported catalysts, Type II isotherms are also detected with sites of different affinity to nitrogen and multilayer coverage at high P/P0. Almost similar pore radius is detected for all catalysts and the supports (Table 1). The FA-Sep composite and supported catalystsexhibit lowersurfaceareasandporevolumes incomparisonto theSep.Thissuggests an increment in thenumberofhostedFAspheresand/orZnOnanoparticles. In themeantime, supported catalysts possess higher surface areas and pore volumes than the FA-Sep. Thus, enhanced adsorption capacities anddegradation abilities are expected in the existence of the supportedcatalysts. 3.4.UV-visDRSanalysis UV-visabsorptionspectroscopiesof theFA,Sep,FA-Sepandsupportedcatalystsarepresented inFigure 1E. Absorption profiles of the supports are similarwith extensions in between 200 and600nm. 0.25MZnOshows its characteristic edgebelow400nm.All supported catalysts reveal this edgewithaslightblueshift relative to0.25MZnOand longerwavelength tails are notdetected.Thebandgapenergies for 0.125MZnO-FA-Sep, 0.25MZnO-FA-Sepand0.5M ZnO-FA-Sep are evaluated by linear extrapolation and taking the intercept on the x-axis as Figure1G-I. (G)XPSsurveyanalysisofFA-Sepand0.5MZnO-FA-Sep, (H)Zn2pXPSspectraof0.5MZnO-FA-Sep, (I) O1sXPSspectraof0.5MZnO-FA-Sep. Adsorption, Kinetics and Photoactivity of ZnO-Supported Fly Ash-Sepiolite Ternary Catalyst http://dx.doi.org/10.5772/intechopen.70504 149