Combustion synthesis and properties of nanostructured ceria-zirconia solid solutions |
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| Affiliation: | 1. College of Chemistry, Jilin University, Changchun 130012, China;2. Department of Orthopaedic Surgery, The First Hospital of Jilin University, Changchun 130021, China;3. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China;1. School of Materials Science and Engineering, Taiyuan University of Science and Technology, 030024 Taiyuan, China;2. School of Environment and Resources, Taiyuan University of Science and Technology, 030024 Taiyuan, China;3. Faculty of Environmental and Municipal Engineering, Henan University of Urban Construction, 467036 Pingdingshan, China;4. Department of Material & Environmental Engineering, Shanxi Polytechnic College, 030006 Taiyuan, China;5. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou, China;1. Belgorod State National Research University, Center for Constructional Ceramics and the Engineering Prototyping, Pobeda 85, Belgorod 308015, Russia;2. Ukrainian State Rail Transport Academy, Feyerbakh Sq. 7, Khar?kov 61001, Ukraine;3. Schools of Physics and Technology, V.N. Karazin Kharkiv National University, Svobody Sq. 4, 61022 Khar?kov, Ukraine;4. Belgorod State National Research University, Joint Research Center, Pobeda 85, Belgorod 308015, Russia;1. Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Américo Vespucio 49, 41092 Sevilla, Spain;2. Departamento de Física de la Materia Condensada, Universidad de Sevilla, Apdo. 1065, 41080 Sevilla, Spain |
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| Abstract: | Nanostructured ceria-zirconia solid solutions (Ce1 ? xZrxO2, x = 0 to 0.9) have been synthesized by a single step solution combustion process using cerous nitrate, zirconyl nitrate and oxalyl dihydrazide (ODH) / carbohydrazide (CH). The as-synthesized powders show extensive XRD line broadening and the crystallite sizes calculated from the XRD line broadening are in the nanometer range (6–11 nm). The combustion derived ceria zirconia solid solutions have high surface area in the range of 36–120 m2/g. Calcination of Ce1 ?xZrxO2 at 1350 °C showed three distinct solid solution regions: single phase cubic (x ≤ 0.2), biphasic cubic-tetragonal (0.2 < x 0̌.8) and tetragonal (x > 0.8). When x ≥ 0.9, the metastable tetragonal phase formed transforms to monoclinic phase on cooling after calcination above 1100 °C. The homogeneity of Ce1 ? xZrxO2 has been confirmed by EDAX analysis. The Temperature Programmed Reduction (TPR) measurement of Ce0.5Zr0.5O2 was carried out with H2 and the TPR profile showed two water formation peaks corresponding to the utilization of surface and bulk oxygen. |
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