| Structures and oxygen storage capacities of CeO2-ZrO2-Al2O3 ternary oxides prepared by a green route： supercritical anti-solvent precipitation |
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| 引用本文： | 黄盼,姜浩锡,张敏华.Structures and oxygen storage capacities of CeO2-ZrO2-Al2O3 ternary oxides prepared by a green route： supercritical anti-solvent precipitation[J].中国稀土学报(英文版),2012(6):524-528. |
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| 作者姓名： | 黄盼 姜浩锡 张敏华 |
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| 作者单位： | Key Laboratory for Green Chemical Technology of Ministry of Education,R&D Center for Petrochemical Technology,Tianjin University |
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| 基金项目： | Foundation item： Project supported by National Natural Science Foundation of China （20976120） and the Natural Science Foundation ofTianjin （09JCYBJC06200） |
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| 摘 要： | CeO2-ZrO2-Al2O3 ternary oxides were successfully prepared by a green route of supercritical anti-solvent precipitation with supercritical CO2 as anti-solvent and methanol as solvent.The structures and oxygen storage capacities of these ternary oxides were characterized by XRD,Raman spectra and oxygen storage capacity measurements.It was found that Al 3+ and Zr 4+ inserted into CeO2 lattice,forming CeO2-ZrO2-Al2O3 solid solution.The concentration of aluminium isopropoxide in the solution affected the concentration of oxygen vacancy and the distortion of oxygen sublattice which were responsible for the oxygen storage capacity.The rapidest oxygen uptake/release rate and maximum total oxygen storage capacity(122.0 mmolO2/molCeO2)were obtained with the aluminium isopropoxide concentration at 0.2 wt.% in the solution.
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| 关 键 词： | CeO2-ZrO2-Al2O3 solid solution supercritical anti-solvent precipitation oxygen storage capacity rare earths |
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