The structural catalyst CuMoO 4 /TiO 2 /TiO 2 + SiO 2 /Ti for diesel soot combustion
| Autor: | M. A. Pugachevsky, I. V. Lukiyanchuk, V. S. Rudnev, N. V. Lebukhova, N. F. Karpovich, E. A. Kirichenko, P. G. Chigrin, V.G. Kurjavyj |
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| Rok vydání: | 2015 |
| Předmět: |
Anatase
Materials science Diesel exhaust chemistry.chemical_element Surfaces and Interfaces General Chemistry Plasma electrolytic oxidation Condensed Matter Physics Combustion medicine.disease_cause Soot Surfaces Coatings and Films law.invention chemistry law Materials Chemistry medicine Calcination Composite material Layer (electronics) Titanium |
| Zdroj: | Surface and Coatings Technology. 261:344-349 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2014.11.002 |
| Popis: | A Ti surface treated by plasma electrolytic oxidation (PEO) in silicate electrolyte has been coated with the nanostructural TiO 2 layer and then impregnated using the sol–gel method with Cu and Mo, which are active ingredients for soot combustion. The layer TiO 2 consists of anatase crystals of up to 50 nm, and has a mosaic-like structure with interconnected surface cracks. The quantity and volume of microcracks depend on both a concentration of the TiO 2 colloidal suspension and a regime of its heat treatment. After impregnation with Cu and Mo and calcination at 550 °С, the surface of the TiO 2 layer is evenly covered by the CuMoO 4 particles of 150–350 nm. The catalytic performance for diesel soot combustion was analyzed under loose contact conditions of soot and catalyst. The structured catalysts CuMoO 4 /TiO 2 /TiO 2 + SiO 2 /Ti provide diesel soot combustion above 280 °С with two maximum rates of 340–360 °С (soot combustion in volume of microcracks) and 397–405 °С (soot combustion on flat sides of a surface). The PEO coating on the titanium substrate showed a good adherence when subjected to an ultrasonic test, and improved after using weakly concentrated colloidal suspension for the formation of a thin TiO 2 layer. |
| Databáze: | OpenAIRE |
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