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Title: | Synthesis of nano-Ce 0.5 Zr 0.5 O 2 by absorption of ammonia into water-in-oil microemulsion in a rotor–stator reactor |
Authors: | Li, Yingwen Wang, Hongrun Arowo, Moses NyoTonglo Sun, Baochang Chen, Jianfeng Shao, Lei |
Keywords: | Nano-Ce0.5Zr0.5O2 Nano-Au/ Ce0.5Zr0.5O2 catalyst Rotor–stator reactor CO oxidation |
Issue Date: | 2015 |
Publisher: | Springer Netherlands |
Abstract: | A gas-microemulsion reaction precipita- tion method was employed to prepare nano-Ce0.5- Zr0.5O2 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 4–8 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 oxida- tion test. CO conversion rate reached 100 % at room temperature, indicating high catalytic activity of the nano-Au/Ce0.5Zr0.5O2 catalyst |
URI: | https://doi.org/10.1007/s11051-015-2871-2 http://ir.mu.ac.ke:8080/jspui/handle/123456789/5431 |
Appears in Collections: | School of Engineering |
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