In situ XPS data for the uranyl-modified oxides under visible light

The silica, alumina, ceria, and titania supports were modified with uranyl ions (5 wt%) and investigated using X-ray photoelectron spectroscopy. The data show the U4f photoelectron spectra and charge state of uranium for uranyl ions deposited on different supports. The additional in situ XPS experiments with simultaneous irradiation of the sample using a 450 nm light-emitting diode were performed, and the XPS spectra, revealing a partial reduction of uranium under visible irradiation, are presented. The data show the effect of support material on the chemical states of uranium and oxygen on the surface of uranyl-modified oxides under visible light

Porous hydroxyapatite-TiO2 nanocomposites from natural phosphates and their decolorization properties

Titanium dioxide-hydroxyapatite nanopowders were prepared by the simultaneous gelation of a titanium alkoxide and precipitation of a redisolved natural phosphate mineral. Evolution of the crystallinity, porous features and surface reactivity of these powders as a function of Ti content and heating was studied. Optimal conditions were found for the preparation of a low-cost nanocomposite powder that was as effective as pure titania for the decolorization of methylene blue solutions

A Study of the Adsorption–Structural Parameters and Photoactivity of TiO2/Kaolinite Composite

The TiO2/kaolinite material—a filler for construction materials with the function of passive degradation of household organic pollutants—has been synthesized and its properties have been examined. Synthesis of the material has been performed under varied conditions: the amount of the reactive mixture and temperature of thermal treatment have been altered. Thereafter, the effect of the synthesis conditions on chemical composition, surface morphology, phase composition, adsorption parameters, and changes in the adsorption activity has been determined at irradiation by UV and visible light