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 MnCo₂O_4.5 nanoneedles on the surface of covalent triazine frameworks (CTFs), resulting in 2D CTF/MnCo₂O_4.5 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/MnCo₂O_4.5 composites and revealed the interaction between CTFs and MnCo₂O_4.5. Scanning electron microscopy (SEM) and elemental mapping further demonstrated the uniform anchoring and dispersion of MnCo₂O_4.5 nanoneedles on the layered CTF surfaces. Additionally, the obtained CTF/MnCo₂O_4.5 composites exhibited promising catalytic capacity for AP decomposition. When added at a loading of 2 wt%, the CTF/MnCo₂O_4.5 composites significantly reduced the thermal decomposition temperature of AP by 81.3 °C, while simultaneously decreasing the content to 30 wt% compared to pure MnCo₂O_4.5 catalysts.