g-C3N4/Fe2O3复合催化剂的表征及其对AP的催化作用

Characterization of g-C3N4/Fe2O3 Composite Catalyst and Its Catalytic Effect on Ammonium Perchlorate

关键词:  固体推进剂  高氯酸氨  催化剂  g-C₃N₄  Fe₂O₃

Key words:  Solid propellant  Ammonium perchlorate  Catalyst  g-C₃N₄  Fe₂O₃

摘要:

为了改善固体推进剂中高氯酸铵（AP）热分解性能，降低其热分解温度，利用SEM，XRD，FT-IR对原位制备的g-C₃N₄/Fe₂O₃复合催化剂的形貌和结构进行了表征，通过差示扫描量热法（DSC）考察了催化剂对AP 热分解的催化效果。结果表明：g-C₃N₄/Fe₂O₃复合结构完整，Fe₂O₃颗粒紧密负载在g-C₃N₄上；加入不同质量分数的复合催化剂，AP的低温分解峰和高温分解峰都明显降低，且随着催化剂加入量的增加催化效果增强；加入复合催化剂质量分数5%时，高温分解峰和低温分解峰分别降低到348.1℃和281.7℃，表明g-C₃N₄/Fe₂O₃复合催化剂可有效降低AP的热分解温度，改善其热分解性能。

Abstract:

In order to improve the thermal decomposition performance of AP in solid propellant and reduce its thermal decomposition temperature， the morphology and structure of g-C₃N₄/Fe₂O₃ obtained in situ were characterized by SEM， XRD and FT-IR， and the catalytic effect of AP thermal decomposition was investigated by Differential Scanning Calorimeter（DSC）. The results show that the composite structure of g-C₃N₄/Fe₂O₃ was complete， and the Fe₂O₃ particles were closely loaded on g-C₃N₄.When different mass fraction of composite catalyst was added， the low temperature decomposition peak and high temperature decomposition peak of AP were significantly reduced， and the catalytic effect was enhanced with the increase of catalyst addition amount. When the mass fraction of composite catalyst was 5%， the high temperature decomposition peak and the low temperature decomposition peak of AP reduced respectively to 348.1℃ and 281.7℃. These results indicate that g-C₃N₄/Fe₂O₃ composite catalyst could effectively reduce the thermal decomposition temperature of AP and improve its thermal decomposition performance.