Preparation of Mesoporous Ce0.5 Zr0.5 O2 Mixed Oxide by Hydrothermal Templating Method
来源期刊：JOURNAL OF RARE EARTHS2007年第6期
论文作者：Gu Xiangkui Li Jinlin Wang Manjuan Feng Shengsheng Gu Yingying
Key words：mesoporous; Ce0.5Zr0.5O2; mixed oxide; PEG-4000; rare earths;
Abstract: Mesoporous Ce0.5Zr0.5O2 mixed oxide with high specific surface area was synthesized under basic condition in the presence of non-ionic surfactant PEG-4000.The effect of synthesis conditions, such as synthesis temperature and the molar ratio of PEG-4000/([Ce]+[Zr]), on specific surface area were investigated.The products were characterized by transmission electron microscopy, powder X-ray diffraction, and nitrogen adsorption-desorption measurements, respectively.The results showed that synthesis temperature and the molar ratio of PEG-4000/([Ce]+[Zr]) had great influence on specific surface area.Under the optimum synthesis conditions, the prepared Ce0.5Zr0.5O2 mixed oxide presented cubic fluorite-type structure and possessed high surface area of 148.6 m2·g-1 with wormlike pores.
Gu Xiangkui1，Li Jinlin2，Wang Manjuan1，Feng Shengsheng1，Gu Yingying1
(1.College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China;
2.Key Laboratory of Cataly sis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education,Hubei Province,South-Central University for Nationalities,Wuhan 430074,China)
Abstract:Mesoporous Ce0.5Zr0.5O2 mixed oxide with high specific surface area was synthesized under basic condition in the presence of non-ionic surfactant PEG-4000.The effect of synthesis conditions, such as synthesis temperature and the molar ratio of PEG-4000/([Ce]+[Zr]), on specific surface area were investigated.The products were characterized by transmission electron microscopy, powder X-ray diffraction, and nitrogen adsorption-desorption measurements, respectively.The results showed that synthesis temperature and the molar ratio of PEG-4000/([Ce]+[Zr]) had great influence on specific surface area.Under the optimum synthesis conditions, the prepared Ce0.5Zr0.5O2 mixed oxide presented cubic fluorite-type structure and possessed high surface area of 148.6 m2·g-1 with wormlike pores.
Key words:mesoporous; Ce0.5Zr0.5O2; mixed oxide; PEG-4000; rare earths;
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