不同制备方法对CeO2-ZrO2-Al2O3材料性能的影响

doi:10.3724/SP.J.1077.2011.00813

无机材料学报 ›› 2011, Vol. 26 ›› Issue (8): 813-818.DOI: 10.3724/SP.J.1077.2011.00813

不同制备方法对CeO₂-ZrO₂-Al₂O₃材料性能的影响

焦毅, 唐石云, 王健礼, 祝淸超, 陈耀强, 龚茂初

(四川大学化学学院, 成都 610064)

收稿日期:2010-10-17 修回日期:2010-12-07 出版日期:2011-08-20 网络出版日期:2011-07-14
作者简介:焦毅(1984-), 男, 硕士研究生. E-mail: jiaoyiscu@163.com
基金资助:
国家自然科学基金重点项目(20773090)

Effects of Different Preparation Methods on the Properties of CeO₂-ZrO₂-Al₂O₃

JIAO Yi, TANG Shi-Yun, WANG Jian-Li, ZHU Qing-Chao, CHEN Yao-Qiang, GONG Mao-Chu

(College of Chemistry, Sichuan University, Chengdu 610064, China)

Received:2010-10-17 Revised:2010-12-07 Published:2011-08-20 Online:2011-07-14
Supported by:
National Natural Science Foundation of China(20773090)

摘要/Abstract

摘要： 分别采用共沉淀法、胶溶法和胶溶-共沉淀法制备了Ce_0.5Zr_0.5O₂(12wt%)-Al₂O₃(CZA)储氧材料, 并通过XRD、低温N2吸附?脱附、氧脉冲吸附(OSC)、程序升温还原(H₂-TPR)和O₂-程序升温脱附(O₂-TPD)等手段进行了表征. 材料经过1000℃焙烧后, XRD结果表明, 三种方法制备的样品均存在CeO₂-ZrO₂立方萤石和γ-Al₂O₃两种晶型. N₂吸附-脱附结果表明, 胶溶-共沉淀法制备的样品, 具有最大的比表面积和孔容, 分别为146.2m²/g和0.5mL/g, 且有最佳的孔径分布; 氧脉冲吸附(OSC)和H₂-TPR结果表明胶溶?共沉淀法制备的材料, 具有最佳的储氧性能和还原能力; 同时实验还比较了经1100℃焙烧对几种方法制备样品性能的影响.

关键词: 铈锆铝复合氧化物, 织构性能, 储氧性能, 还原性能

Abstract: Oxygen storage material of Ce_0.5Zr_0.5O₂(12wt%)-Al₂O₃(CZA) was prepared by three different methods of coprecipitation, peptization and peptization-coprecipitation. The structure and physicochemical properties of materials were characterized by X-ray diffraction (XRD), N₂adsorption-desorption, oxygen pulse adsorption (OSC), H2-temperature programmed reduction (TPR) and O₂-programmed desorption (O₂-TPD). The XRD results demonstrate that all the samples have CeO₂-ZrO₂cubic fluorite and γ-Al₂O₃after calcined at 1000℃. The results according to N₂ adsorption-desorption show that the sample prepared by peptization-coprecipitation has higher specific surface area (146.2 m²/g), larger pore volume (0.5 mL/g), and the best distribution of the pore size. The results from OSC and H₂-TPR indicate that the sample prepared by peptization-coprecipitation has the best performance of oxygen storage and reduction capacity. At the same time, the influence of different methods on the properties of samples after calcined at 1100℃ are discussed.

Key words: CeO₂-ZrO₂-Al₂O₃, structure properties, oxygen storage capacity, redox property

中图分类号:

TB33
O643

焦毅, 唐石云, 王健礼, 祝淸超, 陈耀强, 龚茂初. 不同制备方法对CeO₂-ZrO₂-Al₂O₃材料性能的影响[J]. 无机材料学报, 2011, 26(8): 813-818.

JIAO Yi, TANG Shi-Yun, WANG Jian-Li, ZHU Qing-Chao, CHEN Yao-Qiang, GONG Mao-Chu. Effects of Different Preparation Methods on the Properties of CeO₂-ZrO₂-Al₂O₃[J]. Journal of Inorganic Materials, 2011, 26(8): 813-818.

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不同制备方法对CeO₂-ZrO₂-Al₂O₃材料性能的影响

Effects of Different Preparation Methods on the Properties of CeO₂-ZrO₂-Al₂O₃

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