Construction of Covalent Triazine Framework-Supported MnCo2O4.5 Nanoneedles via Enhanced Dispersion Strategy to Promote Ammonium Perchlorate Thermal Decomposition

Enhanced catalytic activity for composite solid propellants (CSPs) can be achieved through high-efficiency dispersion of active sites on the surface of two-dimensional (2D) materials. In this study, we report the in situ formation of MnCo2O4.5 nanoneedles on the surface of covalent triazine frameworks (CTFs), resulting in 2D CTF/MnCo2O4.5 composites with outstanding catalytic properties for the thermal decomposition of ammonium perchlorate (AP). X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses confirmed the successful preparation of the CTF/MnCo2O4.5 composites and revealed the interaction between CTFs and MnCo2O4.5. Scanning electron microscopy (SEM) and elemental mapping further demonstrated the uniform anchoring and dispersion of MnCo2O4.5 nanoneedles on the layered CTF surfaces. Additionally, the obtained CTF/MnCo2O4.5 composites exhibited promising catalytic capacity for AP decomposition. When added at a loading of 2 wt%, the CTF/MnCo2O4.5 composites significantly reduced the thermal decomposition temperature of AP by 81.3 °C, while simultaneously decreasing the content to 30 wt% compared to pure MnCo2O4.5 catalysts.