Synthesis of Covalently Modified Energetic Graphene Oxide/CuO Composites with Enhanced Catalytic Performance for Thermal Decomposition of Ammonium Perchlorate

Abstract

In this study, a new covalently modified energetic graphene oxide (CMGO) was synthesized by introducing the energetic component 4-amino-1,2,4-triazole on GO sheets through valence bond bonding. The morphology and structure of CMGO were studied by scanning electron microscopy, energy-dispersive spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffractometry, and X-ray photoelectron spectroscopy, and the results showed that CMGO was successfully synthesized. Then, CMGO/CuO was prepared by loading nano-CuO onto CMGO sheets using an ultrasonic dispersion method. Furthermore, the catalytic effect of CMGO/CuO on the thermal decomposition of ammonium perchlorate (AP) was investigated using differential scanning calorimetric technique and thermogravimetric analysis. The results revealed that the high decomposition temperature T H and Gibbs free energy ΔG ⧧ of the CMGO/CuO/ AP composite decreased by 93.9 °C and 15.3 kJ/mol compared with those of raw AP, respectively. The CMGO/CuO composite exhibited more significant catalytic effect on the thermal decomposition of AP than GO/CuO, and the heat release Q of CMGO/ CuO/AP was greatly increased from 132.9 to 1428.5 J/g with 5 wt % CMGO/CuO. The above results demonstrated that CMGO/ CuO is an excellent composite energetic combustion catalyst, which is expected to be widely used in composite propellants.

Green synthesis of copper nanoparticles using white tea leaf extract: Characterization, adsorption behavior, and antibacterial applications

“…Notably strong and broad peaks appeared at 1346 and 1566 cm -1 . The peaks that appeared around 1346 and 1355 cm -1 corresponded to the feature of disorder, defined as the D-peak, while the peaks appearing around 1566 and 1588 cm -1 reflected the first-order scattering of sp 2 carbon atoms and were defined as the G-peak (Li et al 2023). The occurrence of the D and Gpeaks was attributed to the presence of tea polyphenols and other carbonaceous bioactive species in the white tea extract, particularly the species that chelate and stabilize the copper to form CuNPs.…”

Preparation of Zn–Co Bimetallic Catalysts and Their Catalytic Properties for Thermal Decomposition of Ammonium Perchlorate

“…Currently, catalysts for AP combustion predominantly fall into categories such as nanometals, metal oxides, , composites, − ferrocene (Fc)-based compounds − and organometallic complexes. , Among these, nanometals and their corresponding oxides are widely used; however, traditional forms tend to agglomerate, thereby limiting their overall catalytic efficiency. Organometallic complexes often employ lead (Pb) as the metal center due to its low cost and rich coordination modes.…”