碱式碳酸铜在空气中的热分解动力学  

Kinetics of Thermal Decomposition of Basic Copper Carbonate in Air

作　　者：曹瑰华[1] 从长杰[1] 陶友田[1] 张克立[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2005年第4期416-420,共5页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(20071026)

摘　　要：用差热分析(DTA)和热重分析(TG)测定了碱式碳酸铜Cu2(OH)2CO3在空气中的热分解曲线.运用X-射线粉末衍射(XRD)、透射电镜(TEM)等技术对碱式碳酸铜热重分解产物进行了表征.实验结果表明,碱式碳酸铜在空气中分解生成粒径约为10nm的CuO.用Friedman法和Flynn-Wall-Ozawa(FWO)法求取了Cu2(OH)2CO3热分解的活化能为175.53kJ/mol,并用多元线性回归给出了分解过程的可能机理函数.The thermal decomposition processes taking place in the solid state Cu2（OH）2CO3 have been studied in air using TG-DTA （thermogravimetry-differential thermal analysis） techniques . The thermal decomposition products were characterized by the powder X ray diffraction（XRD） and transmission electron microscopy（TEM）. The results show that the final product of the thermal decomposition is CuO with a particle of 10 nm. The activation energies were calculated through the Friedman and Flynn-Wall-Ozawa （FWO） methods, and the possible mechanism functions had been estimated through the multiple-linear regression method. The activation energy for the decomposition of Cu2（OH）2CO3 is 175.53 kJ/mol.

关 键 词：碱式碳酸铜 热酉差热分析 X-射线粉末衍射 动力学 

分 类 号：O614.81[理学—无机化学]