摘要
用3-硝基邻苯二甲酸、氢氧化钠和硝酸氧锆为原料,制备了3-硝基邻苯二甲酸锆,采用元素分析、X射线荧光衍射和FT-IR对其结构进行了表征.用TG-DTG以及变温固相原位反应池/傅里叶变换红外光谱(RSFT-IR)联用技术研究了3-硝基邻苯二甲酸锆的热分解机理,对主分解反应的DTG峰进行了数学处理,计算得到了动力学参数和动力学方程.结果表明,3-硝基邻苯二甲酸锆的分解反应总共有4个阶段,其中主分解反应发生在第2阶段,主分解反应的表观活化能Ea与指前因子A分别为158.84kJ·mol-1和109.85s-1,主分解阶段的反应机理服从一级Mample法则,主分解反应的动力学方程为dα/dt=109.85(1-α)e-1.91×104/T.
Zirconium 3-nitrophthalate （Zr（3-NO2-PHT）2·2H2O） was synthesized using 3-nitrophthalic acid, sodium hydroxide, and zirconyl nitrate as raw materials. Its structure was determined by elemental analysis, X-ray fluorescence and PT-IR spectra. The thermal decomposition mechanism and kinetic parameters of the decomposition reaction for Zr（3-NO2-PHT）2- 2H20 were investigated by temperature-programmed TG-DTG and condensed-phase thermolysis/FT-IR techniques. A kinetic equation for the decomposition reaction was obtained. The results showed that Zr（3-NO2-PHT）2·2H2O underwent a four-stage decomposition process and that the main decomposition reaction occurred during the second process. The apparent activation energy （Ea） and pre-exponentiai factor （A） of the main decomposition reaction are 158.84 kJ· mol^-1 and 10^9.85 s^-1, respectively. The kinetic equation can thus be expressed as： dot/dt=10^3985（1-α）e^-1.9×10^4/T.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2008年第12期2263-2267,共5页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(20573098)资助项目
