MgCo2O4 microflower with excellent thermocatalytic properties for ammonium perchlorate decomposition

• Published in: Journal of materials science 2024-03, Vol.59 (10), p.4136-4151
• Main Authors: Zhao, Zhengyi, Yu, Xin, Zhang, Guofei, Qin, Songnan, Li, Sirong, Yan, Zhiyong, Xiao, Xuechun
• Format: Article
• Language: English
• Subjects: Agglomeration; Ammonium perchlorates; Catalytic activity; Characterization and Evaluation of Materials; Chemical Routes to Materials; Chemistry and Materials Science; Classical Mechanics; Composite propellants; Crystallography and Scattering Methods; Decomposition; Delay time; High temperature; Low temperature; Materials Science; Nanomaterials; Performance tests; Polymer Sciences; Solid Mechanics; Solid propellants; Specific surface; Surface area; Thermal decomposition
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-024-09483-x

The problem of easy agglomeration of nanomaterials will seriously affect their catalytic effect in AP thermal decomposition, so the improvement of the agglomeration phenomenon of nanomaterials has become a hot spot in the study of nanomaterials. In this work, MgCo 2 O 4 microflower was prepared by a simple and efficient one-pot hydrothermal method. No surfactant or templating agent was used in the synthesis process.The specific surface area of MgCo 2 O 4 microflower reached 109.631 m 2  g −1 , which was far more than that of other morphologies of MgCo 2 O 4 . The MgCo 2 O 4 microflower’s increase in specific surface area provided more active sites, which facilitated the rapid thermal decomposition of AP. After adding 2 wt% MgCo 2 O 4 microflower, the low-temperature thermal decomposition (LTD) and high-temperature thermal decomposition (HTD) of AP were combined into one peak, and the T HTD decreased by 191 °C, the activation energy ( Ea ) decreased by 132 kJ mol −1 , and the exothermic amount increased to 1385.1 J g −1 . The thermal decomposition performance tests showed that MgCo 2 O 4 microflower had excellent catalytic activity. In addition, the addition of MgCo 2 O 4 microflower reduced the ignition delay time of AP/HTPB composite solid propellants (CSPs) from 61 to 12 ms, indicating its potential application in CSPs.