3D framework energetic composites: an efficient catalyst for ammonium perchlorate thermal decomposition

A series of M 2 -L@OBC composites (M = Cu(II), Co(II), Fe(III); L = 5-Nitro-3-pyrazolecarboxylic acid; M:L molar ratio = 2:1; OBC = carboxylated bacterial cellulose) with 3D-networknet structure were successfully synthesized and utilized to improve the thermal decomposition of ammonium perchlorate (AP). The M 2 -L@OBC composites were characterized by IR, SEM, TEM, HRTEM, XPS and XRD, and the results indicate that the M 2 -L nanoparticles are evenly covered on cellulose fibers. The catalytic effects were investigated using the non-isothermal method, which shows that the Fe 2 -L@OBC composites exhibits excellent performance. The peak temperature of the high-temperature decomposition (HTD) stage of AP mixing 2 wt% Fe 2 -L@OBC advanced by 66 °C, the activation energy decreased by 56 kJ/mol, and the reaction rate constant increased by 1.1 times. Furthermore, online TG/FT-IR revealed that Fe 2 -L@OBC composites could significantly accelerate the consumption of HClO 4 and NH 3 to the conversion of N 2 O, NO, and NO 2 . This is attributed to the abundant active sites on the Fe 2 -L@OBC surface, which provide fresh active sites after decomposing into metal oxide nanoparticles, thereby promoting the electron transfer process in the HTD stage.