Dave Pragnesh N, Thakkar Riddhi, Sirach Ruksana
Department of Chemistry, Sardar Patel University Gujarat-388120 India
RSC Adv. 2022 Jun 30;12(30):19101-19107. doi: 10.1039/d2ra00953f. eCollection 2022 Jun 29.
In this study, the syntheses of a BaCuO perovskite-structured oxide and rGO were conducted using a sol-gel method and ultrasonication process, respectively. Their physico-chemical characteristics were studied by powder X-ray diffraction (PXRD), Raman spectroscopy, and ultraviolet-visible (UV-vis) spectroscopy analyses. The perovskite type particles were found to present as a cubic crystal system with a crystal size in the range of 10-60 nm. Their catalytic performance was investigated using differential thermal analysis (DTA) measurements at varying heating rates the thermal decomposition of ammonium perchlorate (AP) and 3-nitro-1,2,4-triazol-5-one (NTO). The kinetics and thermodynamics parameters, such as the average activation energy, pre-exponential factor, entropy, and Gibbs free energy, were also investigated, which showed a decrease in the decomposition peak temperature of AP and NTO in the presence of the catalysts rGO, BaCuO, and rGO + BaCuO compared to pure AP and NTO.
在本研究中，分别采用溶胶-凝胶法和超声处理工艺合成了钙钛矿结构的BaCuO氧化物和还原氧化石墨烯（rGO）。通过粉末X射线衍射（PXRD）、拉曼光谱和紫外-可见（UV-vis）光谱分析研究了它们的物理化学特性。发现钙钛矿型颗粒呈现立方晶系，晶体尺寸在10-60nm范围内。使用差示热分析（DTA）测量在不同加热速率下研究了它们对高氯酸铵（AP）和3-硝基-1,2,4-三唑-5-酮（NTO）热分解的催化性能。还研究了动力学和热力学参数，如平均活化能、指前因子、熵和吉布斯自由能，结果表明，与纯AP和NTO相比，在催化剂rGO、BaCuO和rGO+BaCuO存在下，AP和NTO的分解峰温度降低。
