Influence of the preparation method on the structural properties of mixed metal oxides
| Autor: | Elisabete Moreira Assaf, Débora Morais Bezerra |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Materials science Renewable Energy Sustainability and the Environment Coprecipitation Inorganic chemistry Non-blocking I/O 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Decomposition Industrial and Manufacturing Engineering 0104 chemical sciences chemistry Physisorption Mixed oxide General Materials Science 0210 nano-technology Powder diffraction |
| Zdroj: | Science and Technology of Materials. 30:166-173 |
| ISSN: | 2603-6363 |
| DOI: | 10.1016/j.stmat.2018.07.001 |
| Popis: | In this paper, we report a study of the influence of the synthesis method on the properties of mixed metal oxides. For this, the syntheses of the mixed oxide by chemical coprecipitation and modified polymeric precursor (MPP) methods containing Ni2+, Zn2+, Al2+, and Zr4+ were conducted. For this purpose, the samples were characterized by X-ray powder diffraction, which showed defined peaks for the mixed metal oxides (NiO, ZnO, and ZrO2). The interaction of H2 with mixed oxides has been investigated using temperature-programmed reduction (H2-TPR); this result showed that the modified polymer precursor method favored the presence of the peak at elevated temperatures. The N2 physisorption (BET method) showed that the polymer precursor method provided higher specific surface areas and basic site numbers in relation to the coprecipitation method. Thermogravimetric analysis of the systems decomposition revealed their disintegration at ~550 °C and resulted in mixed metal oxides in both methods. |
| Databáze: | OpenAIRE |
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