Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 26    No. 4    April 2016

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Reaction pathway and kinetics of CdO nanoparticles prepared from CdCO3 precursor using thermal decomposition method
Gholam Reza KHAYATI1, Seyed Hadi SHAHCHERAGHI2,3, Vahid LOTFI1, Esmael DAREZARESHKI3

1. Department of Materials Science and Engineering,
Shahid Bahonar University of Kerman, P. O. Box No. 76135-133, Kerman, Iran;
2. Department of Advanced Science and Technology,
Shahid Bahonar University of Kerman, P. O. Box No. 76135-133, Kerman, Iran;
3. Mineral Industries Research Centre, Shahid Bahonar University of Kerman, P. O. Box No. 76135-133, Kerman, Iran

Abstract:The non-isothermal kinetics of CdO nanoparticles prepared from CdCO3 precursor using thermal decomposition method was investigated. A model-fitting Malek approach and a model-free advanced isoconversional method of Vyazovkin were applied to the analysis of the DSC and TGA data. The results showed that CdO nanoparticles prepared from CdCO3 followed an autocatalytic reaction. Sestak–Berggren model could favorably describe the studied reaction process. Moreover, the apparent activation energy of CdCO3 decomposition was calculated to be (119.19±9.97) kJ/mol and the explicit rate equation form of CdCO3 decomposition was established.

 

Key words: CdCO3; CdO nanoparticle; kinetic modeling; thermal decomposition; advanced isoconversional method

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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