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- W2328505781 abstract "Polycrystalline ZnO/TiO2 solids have been prepared with four different methods using home prepared TiO2 (anatase) or TiO2 (rutile) as supports and Zn(NO3)2·6H2O or Zn(CH3COO)2·2H2O as precursors for ZnO. The bulk and surface properties of the samples were investigated by means of TG-DTA, XRD, TEM, SEM-EDAX, XPS, BET surface area determination, and porosity measurements. XRD and TEM results indicate that no significant defect structures exist in any of the samples. The ZnO crystallinity and its enrichment on the surface of TiO2 particles were dependent on the preparation method. The surface areas generally decrease by increasing the amount of ZnO except when ZnO from Zn(CH3COO)2·2H2O was supported on TiO2 (rutile). The samples prepared from Zn(CH3COO)2·2H2O were more porous than those prepared from Zn(NO3)2·6H2O. This was confirmed by BET surface area determinations and SEM observations. XPS spectra indicate that the atomic ratio between OH- and O2- on the particles surface is similar for samples with the same ZnO content independent of the precursor used for the samples' preparation. Moreover a much higher segregation of ZnO was found for samples obtained by using the acetate precursor." @default.
- W2328505781 created "2016-06-24" @default.
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- W2328505781 date "2001-01-12" @default.
- W2328505781 modified "2023-10-18" @default.
- W2328505781 title "Preparation Characterization and Photocatalytic Activity of Polycrystalline ZnO/TiO<sub>2</sub> Systems. 1. Surface and Bulk Characterization" @default.
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- W2328505781 doi "https://doi.org/10.1021/jp003172r" @default.
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