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- W2371302938 abstract "Heterogeneous catalytic ozonation technology is a new type of ozone oxidation method,which can degrade the organic compounds that couldn't be oxidized or degraded by ozone alone at room temperature and normal pressure.SnO_2 was prepared by precipitation method and mental oxides modified SnO_2 catalysts were prepared by coprecipitation method.High concentration molasses fermentation wastewater degradation by SnO_2 catalyzed ozonation was used as a probe reaction and IR spectra of pyridine adsorption on SnO_2 and metal oxide modified SnO_2 was studied to identify the surface acidity on catalysts.The IR spectra of pyridine adsorption on SnO_2 showed,hexahydroxy ring vibration which was formed by pyridine complexes to SnO_2 surface was showed at 1449 cm-1 indicated that there were Lewis acid sites exist on SnO_2 surface.Acid type and acid sites changed after other second metal oxides were added to SnO_2.There is only Lewis acid site exist on CuO-SnO_2 catalyst surface.There are not only Lewis acid sites but also different strength Br nsted acid sites exist on NiO-SnO_2,Fe2O3-SnO_2 and CoO-SnO_2 surface,and a second kind Lewis acid sites,which was know from that of SnO_2,was found on Fe2O3-SnO_2 and CoO-SnO_2 surface.The Lewis acid strength was weak and Brnsted acid strength was enhanced on NiO-SnO_2,Fe2O3-SnO_2 and CoO-SnO_2 while water exit,and at the same time weak Brnsted acid was found on CuO-SnO_2 surface.Compared the acid types on catalysts surface with the catalyzed ozonation activity,it was found that Brnsted acid site existing was a reason of the catalytic activity decreasing." @default.
- W2371302938 created "2016-06-24" @default.
- W2371302938 creator A5058394999 @default.
- W2371302938 date "2009-01-01" @default.
- W2371302938 modified "2023-09-24" @default.
- W2371302938 title "Study on Surface Acid and Catalyzed Ozonation Activity of SnO_2" @default.
- W2371302938 hasPublicationYear "2009" @default.
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