Title :
Template-free hydrothermal synthesis and characterisation of single crystalline Ce(OH)CO3 and CeO2 with spindle-like structures
Author :
Tao Fan ; Lixin Zhang ; Hongfang Jiu ; Yixn Sun ; Guode Liu ; Youyi Sun ; Qinglin Su
Author_Institution :
Dept. of Chem. Eng. & Environ., North Univ. of China, Taiyuan, China
fDate :
8/1/2010 12:00:00 AM
Abstract :
Single crystalline Ce(OH)CO3 and CeO2 with spindle-like structures were synthesised by a facile hydrothermal synthesis method. Then the effect of reaction time and concentration of cerium precursor on the formation and morphologies of Ce(OH)CO3 and CeO2 were further investigated. The products were characterised by X-ray powder diffraction, transmission electron microscopy and scanning electron microscopy. The results show that the single crystalline Ce(OH)CO3 with spindle-like structures could be obtained at 120°C for 8°h. The present method shows an easy process without high reaction temperature, long reaction time, surfactant and template to attain final Ce(OH)CO3 products. Furthermore, single crystalline CeO2 with spindle-like structures had been fabricated by a oxidation process at 600°C for 2°h using Ce(OH)CO3, with spindle-like structures as the precursor. Meanwhile, the single crystalline spindle-like CeO2 shows a high catalytic activity on CO conversion.
Keywords :
X-ray diffraction; catalysis; cerium compounds; crystal growth from solution; crystal structure; oxidation; scanning electron microscopy; transmission electron microscopy; Ce(OH)CO3; CeO2; SEM; TEM; X-ray powder diffraction; XRD; carbon monoxide conversion; catalytic activity; cerium precursor concentration; oxidation process; reaction temperature; reaction time; scanning electron microscopy; single crystal; spindle-like structures; surfactant; temperature 120 degC; temperature 600 degC; template-free hydrothermal synthesis; time 2 h; time 8 h; transmission electron microscopy;
Journal_Title :
Micro & Nano Letters, IET
DOI :
10.1049/mnl.2010.0063
