Effect of RGO-MoS2/MnO2 nanocomposites with high catalytic activity on the combustion of AP/HTPB composite propellant

Abstract

A novel RGO-MoS2/MnO2 (RSM) nanocomposite catalyst was effectively constructed by in situ hydrothermal method. RSM nanocomposite was constructed by using RGO-MoS2 composite as a substrate and in situ MnO2 as a catalytic core. Various characterization tests were used to prove the successful preparation of RSM nanocomposite and the results showed that RSM-3 exhibited a network-loaded nanoparticle structure with lots of active sites. During catalytic and combustion experiments, RSM-3 showed significant catalysis for AP decomposition. The catalytic experiment results showed that RSM-3 (2.0 wt%) could highly decrease AP decomposition temperature to about 327.8 ºC and enhance the heat release to 1530.4 J‧g−1. RSM-3 (2.0 wt%) dramatically decreased the Ea of HD stage by 112.7 kJ·mol−1. It also shortened the ignition delay time of AP/HTPB propellants by 61.8% and increased the mass burning rate by 148%. Excellent catalytic performance of RSM-3 might be owing to the synergy of metal-carbon structure of RGO-MoS2 and MnO2 nanoparticles. This work provides a new direction for the synthesis of novel catalyst materials with high catalytic activity.