Preparation and catalytic activities of CuFe 2 O 4 nanoparticles assembled with graphene oxide for RDX thermal decomposition

Abstract

A graphene oxide-based nano-metal composite oxide CuFe₂O₄/GO was successfully prepared by a versatile self-assembly approach. Structure and morphological characterization of CuFe₂O₄/GO nanocomposite were studied in detail by a series of characterization techniques including XRD, FT-IR, XPS, BET, SEM, and TEM. The results revealed that the self-assembly process did not destroy the composition and morphology of the spinel-structured CuFe₂O₄ particle, and the transparent GO sheets with wrinkled and rough texture are tightly coated on the surface of CuFe₂O₄ nanoparticles like a layer of thin gauze clothing. The particle size of CuFe₂O₄ is about 200 nm. Catalytic activity of as-prepared CuFe₂O₄/GO nanocomposite on the thermal decomposition of cyclotrimethylene trinitramine (RDX) was investigated via differential scanning calorimetry (DSC). The experimental results show that the CuFe₂O₄/GO nanocomposite has much higher catalytic activity than single CuFe₂O₄ nanoparticles and GO. Thermal decomposition temperature and apparent activation energy of RDX were reduced from 241.27 to 220.34 °C and from 172.6 to 142.56 kJ mol⁻¹, respectively. The improved performance could be attributed to the “positive synergistic effect” between CuFe₂O₄ nanoparticles and GO.