In the current study, catalytic behaviour of La_0.5Sr_0.5BO₃ (B=Cu, Fe and Ni) perovskite-like catalysts synthesized by sol-gel method were examined in catalytic peroxidation of acrylic acid as a model organic compound and further characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) with energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The effect of various parameters such as catalyst dose, H₂O₂/acrylic acid molar ratio, temperature, pH and initial acrylic acid concentration on acrylic acid and COD removal was studied. The maximum acrylic acid and COD removal of 86.79% and 71.57% were observed at optimum operating conditions (e.g., La_0.5Sr_0.5CuO₃ catalyst dose = 600 mg/L, stoichiometric molar ratio of H₂O₂/acrylic acid = 1.5, pH = 3, temperature 65 °C and reaction time = 3 h). The ROS scavenging studies were performed to identify in-situ generated reactive oxidant species, e.g., hydroxyl radicals (^•OH), superoxide radicals (O₂^•־) and singlet oxygen (¹O₂) and treated with their respective quencher during catalytic peroxidation of acrylic acid. Acrylic acid removal kinetics was performed by first order and Langmuir-Hinshelwood kinetic models. The plausible degradation mechanism was proposed based on intermediates identified by GC-MS analysis during catalytic peroxidation of acrylic acid.

在目前的研究中，研究了通过溶胶-凝胶法合成的 La _0.5 Sr _0.5 BO ₃ (B=Cu、Fe 和 Ni) 类钙钛矿催化剂在作为模型有机化合物的丙烯酸催化过氧化中的催化行为，并进一步表征了X 射线衍射 (XRD)、傅里叶变换红外光谱 (FTIR)、具有能量色散 X 射线 (EDX)、X 射线光电子能谱 (XPS) 和透射电子显微镜 (TEM) 的扫描电子显微镜 (SEM)。催化剂剂量、H ₂ O ₂等各种参数的影响研究了丙烯酸摩尔比、温度、pH 和初始丙烯酸浓度对丙烯酸和 COD 去除的影响。在最佳操作条件下（例如，La _0.5 Sr _0.5 CuO ₃催化剂剂量 = 600 mg/L，H ₂ O ₂ /丙烯酸的化学计量摩尔比= 1.5， pH = 3，温度 65 °C，反应时间 = 3 小时）。进行 ROS 清除研究以识别原位生成的活性氧化剂物种，例如羟基自由基 ( ^• OH)、超氧自由基 (O ₂ ^{• ־} ) 和单线态氧 ( ¹ O ₂) 并在丙烯酸的催化过氧化过程中用它们各自的淬灭剂处理。丙烯酸去除动力学通过一级和 Langmuir-Hinshelwood 动力学模型进行。基于在丙烯酸催化过氧化过程中通过 GC-MS 分析鉴定的中间体，提出了合理的降解机制。