Abstract In this study, α-Fe2O3 nanoparticles were successfully prepared by a simple and direct hydrothermal method using three different precursors (iron chloride, iron nitrate and iron sulphate). Structure and morphological characterization of the different nanoparticles have been investigated in detail by using a series of analytical methods including FTIR, Raman, XRD and SEM. The synthesized nanoparticles, predominately spherical in shape, have similar chemical structure, whatever the precursor employed. A higher crystallinity has been obtained for nanoparticles derived from iron chloride precursor, which present less agglomeration. The catalytic activity of as-prepared nanoparticles on the thermal decomposition of nitrocellulose (NC) was studied via differential scanning Calorimetry (DSC). Four isoconversional methods have been used to determine the kinetics triplets using the DSC data at different heating rates. It is revealed that the different nanocatalysts have a slight effect on the peak decomposition temperature of NC, whereas a notable decrease of the activation energy is obtained, especially for nanoparticles derived from iron chloride precursor. Finally, we can deduce that Fe2O3 prepared using iron chloride as a precursor may be safely used as an efficient catalyst for NC.

中文翻译：

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不同前驱体α-Fe2O3纳米粒子的合成与表征及其对硝化纤维素热分解的催化作用

摘要 在本研究中，使用三种不同的前驱体（氯化铁、硝酸铁和硫酸铁），通过简单直接的水热法成功制备了 α-Fe2O3 纳米颗粒。通过使用一系列分析方法，包括 FTIR、拉曼、XRD 和 SEM，已经详细研究了不同纳米颗粒的结构和形态表征。无论采用何种前体，合成的纳米颗粒主要呈球形，具有相似的化学结构。源自氯化铁前体的纳米颗粒获得了更高的结晶度，其团聚较少。通过差示扫描量热法 (DSC) 研究了所制备的纳米粒子对硝化纤维素 (NC) 热分解的催化活性。四种等转化方法已用于使用不同加热速率下的 DSC 数据确定动力学三重态。结果表明，不同的纳米催化剂对 NC 的峰值分解温度有轻微影响，而活化能显着降低，特别是对于源自氯化铁前驱体的纳米颗粒。最后，我们可以推断出，以氯化铁为前驱体制备的 Fe2O3 可以安全地用作 NC 的有效催化剂。