Synthesis of nano-Ce0.5Zr0.5O2 by absorption of ammonia into water-in-oil microemulsion in a rotor–stator reactor

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• 作者：Yingwen Li ; Hongrun Wang ; Moses Arowo ; Baochang Sun…
• 关键词：Gas ; microemulsion reaction precipitation method ; Nano ; Ce0.5Zr0.5O2 ; Nano ; Au/Ce0.5Zr0.5O2 catalyst ; Rotor–stator reactor ; CO oxidation
• 刊名：Journal of Nanoparticle Research
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：17
• 期：1
• 全文大小：1,020 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nanotechnology
  Inorganic Chemistry
  Characterization and Evaluation Materials
  Physical Chemistry
  Applied Optics, Optoelectronics and Optical Devices
  
• 出版者：Springer Netherlands
• ISSN：1572-896X

文摘

A gas-microemulsion reaction precipitation method was employed to prepare nano-Ce0.5Zr0.5O2 by absorption of NH3 into water-in-oil (W/O) microemulsion in a rotor–stator reactor . The effects of different operating conditions including final pH of the microemulsion, reaction temperature, initial Ce3+ and Zr4+ concentration, rotation speed, and gas–liquid volumetric ratio were investigated. Nano-Ce0.5Zr0.5O2 with an average diameter of about 5.5?nm, a specific surface area of 215.6?m2/g and a size distribution of 4-?nm was obtained under the optimum operating conditions. The as-prepared nano-Ce0.5Zr0.5O2 was loaded with Au to prepare nano-Au/Ce0.5Zr0.5O2 catalyst which was subsequently used for CO oxidation test. CO conversion rate reached 100?% at room temperature, indicating high catalytic activity of the nano-Au/Ce0.5Zr0.5O2 catalyst.