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Mikhail F. Butman Nataliya E. Kochkina Nikolay L. Ovchinnikov Karl W. Krmer 《Molecules (Basel, Switzerland)》2021,26(11)
Fibrous Ti/Ce oxide photocatalysts were prepared for the first time by a biomimetic solution process using short flax fibers (flax straw processing waste) as a biotemplate. Titanium polyhydroxy complex solutions with 3% and 5% cerium were used as precursors. Flax fibers were impregnated in an autoclave under hydrothermal conditions. Ti/Ce oxides were obtained from the biotemplate by annealing at 600 °C. The photocatalytic activity of the Ti/Ce oxides was studied by the adsorption and decomposition of the dye rhodamine B under UV irradiation. The photocatalytic decomposition of the dye was 50% and 75% faster for Ti/Ce oxides with 3% and 5% Ce, respectively, than for the analogous undoped fibrous TiO2. The morphologies, textures, and structures of the photocatalysts were studied by scanning electron microscopy, low temperature N2 adsorption/desorption, UV-Vis spectroscopy, and X-ray and XPS analytical methods. It was shown that the introduction of Ce into the precursor solution increased the surface irregularity of the Ti/Ce oxide crystallites compared to pure TiO2. This effect scaled with the Ce concentration. Ce improved the UV light absorption of the material. The Ti/Ce oxides contained Ce4+/Ce3+ pairs that played an important role in redox processes and intensified the photocatalytic activity. 相似文献
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Khlyustova Anna Sirotkin Nikolay Kochkina Nataliya Krayev Anton Titov Valeriy Agafonov Alexander 《Plasma Chemistry and Plasma Processing》2019,39(1):311-323
Plasma Chemistry and Plasma Processing - An atmospheric pressure glow discharge generated between the solid cathode and liquid anode was applied to produce silver nanoparticles and deposition of... 相似文献