XPS and TPR study of sol-gel derived M/TiO<sub>2</sub> powders (M=Co, Cu, Mn, Ni)
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 Mn+/TiO2 were strongly affected...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Chuiko Institute of Surface Chemistry of NAS of Ukraine
2015-05-01
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| Series: | Хімія, фізика та технологія поверхні |
| Subjects: | |
| Online Access: | https://cpts.com.ua/index.php/cpts/article/view/323 |
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| Summary: | 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 Mn+/TiO2 were strongly affected by the synthesis method, preparation conditions and interactions between the dopant metal and TiO2 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 Mn+/TiO2, where M=Co, Ni, Mn, and as monovalent and divalent ions in the case of Cu/TiO2. |
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| ISSN: | 2079-1704 2518-1238 |