XPS and TPR study of sol-gel derived M/TiO2 powders (M=Co, Cu, Mn, Ni)
| Autor: | N. P. Smirnova, L. P. Oleksenko, L. V. Lutsenko, O. O. Kelyp, G. V. Krylova, I. S. Petrik |
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| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Materials science Dopant Doping Metallurgy Surfaces and Interfaces Surfaces Coatings and Films Divalent law.invention Metal Colloid and Surface Chemistry chemistry X-ray photoelectron spectroscopy law visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Copolymer Calcination Physical and Theoretical Chemistry Mesoporous material Nuclear chemistry |
| Zdroj: | Himia, Fizika ta Tehnologia Poverhni. 6:179-189 |
| ISSN: | 2079-1704 |
| DOI: | 10.15407/hftp06.02.179 |
| Popis: | Produced by templated sol-gel method mesoporous nanosized titania powders modified with 3d-metal ions have been characterized by XPS and TPR methods. Metal species formed on the titania surface were investigated. The TPR analysis showed that reduction behaviors of the M n+ /TiO 2 were strongly affected by the synthesis method, preparation conditions and interactions between the dopant metal and TiO 2 matrix. It was found that Ti–O–M– bonds formation during sol-gel synthesis with applying nonionic triblock copolymer Pluronic P123 as organic template and calcination at 550 °C promoted high-dispersion states of doped 5 % metals. The XPS and TPR showing dopants exist as divalent and trivalent ions for M n+ /TiO 2 , where M=Co, Ni, Mn, and as monovalent and divalent ions in the case of Cu/TiO 2 . |
| Databáze: | OpenAIRE |
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