Preparation of Nano-Cu-Fe Composite Metal Oxides via a Mechanical Grinding Method and Its Catalytic Performance for the Thermal Decomposition of Ammonium Perchlorate
Preparation of Nano-Cu-Fe Composite Metal Oxides via a Mechanical Grinding Method and Its Catalytic Performance for the Thermal Decomposition of Ammonium Perchlorate
复制标题
机械研磨法制备纳米Cu-Fe复合金属氧化物及其对高氯酸铵热分解的催化性能
DOI：
10.1080/00102202.2019.1679125
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发表时间：
2019-10-21
影响因子：
1.9
通讯作者：
Gao, Hongxu
中科院分区：
文献类型：
--
作者：
Hao, Gazi;Li, Hao;Gao, Hongxu
本文采用机械研磨法制备了一系列不同CuO/Fe_2O_3摩尔比（1：2，1：1，1：0.5，1：0.25）的纳米Cu-Fe复合金属氧化物（纳米CuO/Fe_2O_3）。采用X射线衍射仪（XRD）、X射线能谱仪（EDS）、X射线光电子能谱仪（XPS）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对样品的微观结构、表面元素和形貌进行了分析。采用热重分析（TG）和差示扫描量热分析（DSC）研究了纳米Cu-Fe复合金属氧化物对高氯酸铵（AP）热分解的催化作用。结果表明，当CuO/Fe 2 O3摩尔比为1：2时，纳米Cu-Fe复合金属氧化物对AP热分解的催化效果最好。此外，结果表明，AP的分解温度从441.3°C下降到355.3°C，而分解热从941上升到1749 J/g，这支持CuO和Fe 2 O3纳米颗粒之间存在协同效应。
ABSTRACT In this article, a series of nano-Cu-Fe composite metal oxides (nano CuO/Fe2O3), with different molar ratios of CuO/Fe2O3 (1:2, 1:1, 1:0.5, 1:0.25), were prepared in large-scale by mechanical grinding. The microstructures, surface elements and morphologies of samples are analyzed by X-ray diffraction (XRD), X-ray energy dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The catalytic effects of nano-Cu-Fe composite metal oxides on the thermal decomposition of ammonium perchlorate (AP) were investigated by thermogravimetric (TG) analysis and differential scanning calorimetric (DSC) techniques. The results show that nano-Cu-Fe composite metal oxides with the molar ratio of CuO/Fe2O3 = 1:2 have the best catalytic effect for AP thermal decomposition as compared to the other nano-Cu-Fe composite metal oxides, the single nano CuO, and nano Fe2O3. Also, the results show that the decomposition temperature of AP has fallen from 441.3°C to 355.3°C, whereas the decomposition heat has risen from 941 to 1749 J/g, which supports the existence of a synergistic effect between CuO and Fe2O3 nanoparticles.