Kinetics of thermal decomposition of CeO nanocrystalline precursor prepared by precipitation method

SONG Xiaolan, HE Xi, YANG Haiping, XU Dayu, JIANG Nan, QIU Guanzhou

Front. Chem. China ›› 2008, Vol. 3 ›› Issue (2) : 182-185.

PDF(226 KB)
PDF(226 KB)
Front. Chem. China ›› 2008, Vol. 3 ›› Issue (2) : 182-185. DOI: 10.1007/s11458-008-0035-y

Kinetics of thermal decomposition of CeO nanocrystalline precursor prepared by precipitation method

  • SONG Xiaolan, HE Xi, YANG Haiping, XU Dayu, JIANG Nan, QIU Guanzhou
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Abstract

The thermal decomposition of CeO2 nanocrystalline precursor prepared by chemical precipitation method was investigated using thermo-gravimetric/differential scanning calorimetry (TG/DSC) and X-ray powder diffraction (XRD). In particular, the differential thermal analysis curves for the decomposition of CeO2 nanocrystalline precursor were measured at different heating rates in air by a thermal analyzer (NETZSCH STA 449C, Germany). The kinetic parameters of the thermal decomposition of CeO2 nanocrystalline precursor were calculated using the Kissinger method and the Coats-Redfern method. Results show that the apparent active energy E of the reaction is 105.51 kJ/mol, the frequency factor lnA is 3.602 and the reaction order n is 2. This thermal decomposition process can be described by the anti-Jander equation and a three-dimensional diffusion mechanism.

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SONG Xiaolan, HE Xi, YANG Haiping, XU Dayu, JIANG Nan, QIU Guanzhou. Kinetics of thermal decomposition of CeO nanocrystalline precursor prepared by precipitation method. Front. Chem. China, 2008, 3(2): 182‒185 https://doi.org/10.1007/s11458-008-0035-y

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