纳米CuFe2O4催化硫酸铜热分解及机理研究

Investigation on Catalytic Thermal Decomposition Behavior and Mechanism of Bluestone by CuFe2O4 Nano-particles

通过硫酸铜的热分解行为研究了纳米铁酸铜的催化机理。采用共沉淀法制备不同物质的量比的纳米CuFe2O4催化剂，并测定了不同成分和用量的催化剂对硫酸铜热分解温度及热分解表观活化能的影响。通过X射线衍射和扫描电镜对铁酸铜晶体进行表征，用差热分析（TG—DSC）法测定硫酸铜的分解热变化量以衡量催化剂活性。结果表明：Cu^2＋、Fb^3＋物质的量比为1：1，质量分数为20％的CuFe2O4对CuS04的催化效果最佳，该奈件下CuSO4的高温分解峰与低温分解峰重合，分解峰温度向低温方向移动了29．5℃，表现分解热吸热量降低了112．1 J／g。

By the study of the thermal decomposition behavior of CuSO4, the catalytic mechanism of CuFe2O4 nano-particles was investigatied. The CuFe2O4 nano-partieles catalysts with different Cu^2＋/Fe^3＋ molar ratios were prepared by homogeneous co-precipitation. The temperature and activation energy for thermal decomposition of CuSO4 were examined under a series of catalysts in different dosage. The copper ferrite crystal was charaeterized by XRD and SEM ,the decomposing heat change of CuSO, were obtained by TG-DSC method to evaluate the catalytic activity of CuFe2O4. The results show that CuFe2O4 with the Cu^2＋/Fe^3＋ molar ratio of 1：1 had superior catalytic properties and catalytic efficiency reached maximal when mixed 20% CuFe2O4 （in mass fraction ） into CuSO4 crystals. In those conditions ,the high and low temperature decomposition peaks of CuSO4 were superposition. The low temperature decomposition peak was decreased 29.5 ℃ and the apparent heat of decomposition was decreased by 112.1 J/g.