Abstract The main goal of this work is the preparation of magnetic perovskites La1-xSrxMnO3 (x = 0, 0.2 and 0.4) with a modified sol-gel process and the assessment of their catalytic activity in the oxidation of styrene in neat water (aqueous medium). The structural properties of LaMnO3, La0.8Sr0.2MnO3 and La0.6Sr0.4MnO3 were characterized using the X-ray Diffraction and infrared techniques. Microstructural features of the catalyst were confirmed by the Scanning Electron Microscopy. The sample La0.6Sr0.4MnO3 has proven a good catalytic activity in the oxidation of styrene after different optimization steps. The catalyst has shown a good recyclability after four cycles. The optimized parameters of the reaction procedure were applied successfully in the oxidation of other simple olefins.

中文翻译：

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磁性钙钛矿La1-xSrxMnO3的合成与表征：水性介质中烯烃氧化的绿色催化剂

摘要 这项工作的主要目标是用改进的溶胶-凝胶法制备磁性钙钛矿 La1-xSrxMnO3 (x = 0、0.2 和 0.4)，并评估它们在纯水（水性介质）中氧化苯乙烯的催化活性。 ）。使用X射线衍射和红外技术表征了LaMnO3、La0.8Sr0.2MnO3和La0.6Sr0.4MnO3的结构特性。通过扫描电子显微镜确认了催化剂的微观结构特征。经过不同优化步骤后，样品 La0.6Sr0.4MnO3 已证明在苯乙烯氧化中具有良好的催化活性。该催化剂在四次循环后表现出良好的可回收性。该反应过程的优化参数已成功应用于其他简单烯烃的氧化。