摘要
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.
研究用热分解法从CdCO_3前驱体制备CdO纳米颗粒的非等温动力学。采用Malek模型模拟法和改进的非模型等转化率Vyazovkin法对所得DSC和TDA数据进行分析。结果表明,从CdCO_3制备CdO纳米颗粒的反应属于自动催化反应。Sestak-Berggren模型能很好地描述该反应过程。另外,计算得到CdCO_3热分解反应的表观活化能为(119.19±9.97)kJ/mol,并建立了该热分解反应的反应速率方程。
