An Efficient Nanocatalyst Cobalt Copper Zinc Ferrite for the Thermolysis of Ammonium Nitrate

Abstract

This work reports synthesis and catalytic effect of cobalt copper zinc ferrite (CoCuZnFe 2 O 4 ) on the thermal decomposition of ammonium nitrate (AN). AN is a crystalline hygroscopic powder widely applicable as an oxidizer in the propellant formulations for high energetic materials but requires improvement in its thermal decomposition characteristics. Nanocatalyst spinel ferrite CoCuZnFe 2 O 4 was prepared using the coprecipitation method and characterized by various physicochemical instrumental techniques like XRD, FE-SEM, UV−vis, Raman, and TG-DSC. Catalytic study of AN in the presence of nano-CoCuZnFe 2 O 4 was investigated using DSC analysis. The Raman and XRD study confirm the formation of ferrite with a crystalline size 9−22 nm. TG suggests that the catalyst was thermally stable up to 400 °C with ∼10% mass loss. The UV−vis study shows that the optical band gap energy of CoCuZnFe 2 O 4 was 2.6 eV, which may help in fast acceleration of electrons during thermolysis of AN, making the thermal decomposition of AN more favorable in the presence of CoCuZnFe 2 O 4 . The thermal decomposition investigation suggests that the activation energy of AN thermolysis in the presence of 2 wt % CoCuZnFe 2 O 4 was decreased by ∼37%. It is concluded that CoCuZnFe 2 O 4 can be used as an efficient catalyst for improving AN's thermal characteristics.

A strategy for modulating the catalytic active center of AP thermal decomposition and its application: La-doped MgCo2O4

“…[4][5][6] Therefore, the improvement of combustion performance by optimizing the thermal decomposition temperature, heat release, activation energy, and reaction rate of AP has received considerable attention. 7,8 Nanocatalysts have become an integral part of CSPs as an effective strategy for signicantly enhancing the thermal decomposition performance of AP. 9 The most widely used nanocatalysts for AP pyrolysis include transition metal oxides (TMOs), 10,11 two-dimensional nanocarbon materials, 12,13 organic nanomaterials, 14,15 and modied TMOs.…”