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首页> 外文期刊>RSC Advances >Novel in situ synthesis of copper nanoparticles supported on reduced graphene oxide and its application as a new catalyst for the decomposition of composite solid propellants
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Novel in situ synthesis of copper nanoparticles supported on reduced graphene oxide and its application as a new catalyst for the decomposition of composite solid propellants

机译：还原氧化石墨烯负载的铜纳米粒子的原位合成及其作为分解复合固体推进剂的新型催化剂的应用

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The catalytic activity of graphene oxide (GO), reduced graphene oxide (rGO), copper nanoparticles (CuNP) and rGO supported copper nanoparticles (rGO|CuNP) was investigated for the thermal decomposition of ammonium perchlorate (AP). GO was synthesized using a methodology based on hydrophilic oxidation, while an environmentally friendly and non-toxic reducing agent, L -ascorbic acid, was applied for the in situ reduction of copper and GO. The supporting rGO reduced the mean size of the copper nanoparticles from approximately 6 to 2 ? due to the presence of stabilizing functional groups on the graphitic structure. Theoretical studies through Density Functional Theory revealed the important role of the epoxy and carbonyl groups of rGO on the stabilization of copper. The thermal decomposition process was studied based on DSC and TGA. GO, and rGO did not show a significant catalytic influence in the decomposition of AP. CuNP reduced the decomposition temperature of AP in greater magnitude than rGO|CuNP however, the synergistic effect of the rGO and CuNP increased the energy release significantly.
机译：研究了氧化石墨烯（GO），还原氧化石墨烯（rGO），铜纳米颗粒（CuNP）和rGO负载的铜纳米颗粒（rGO | CuNP）的催化活性对高氯酸铵（AP）的热分解。使用基于亲水性氧化的方法合成了GO，同时将环保且无毒的还原剂L-抗坏血酸用于铜和GO的原位还原。支持性rGO将铜纳米颗粒的平均尺寸从大约6减少到2？由于在石墨结构上存在稳定的官能团。通过密度泛函理论的理论研究表明，rGO的环氧基和羰基对铜的稳定具有重要作用。基于DSC和TGA对热分解过程进行了研究。 GO和rGO在AP分解中没有显示出明显的催化作用。与rGO | CuNP相比，CuNP降低了AP的分解温度，但rGO和CuNP的协同作用显着提高了能量释放。

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