Abstract This study presents a preparation of SrFe12O19– SrTiO3 nanocomposite synthesis via the green auto-combustion method. At first, SrFe12O19 nanoparticles were synthesized as a core and then, SrTiO3 nanoparticles were prepared as a shell for it to manufacture SrFe12O19–SrTiO3 nanocomposite. A novel sol-gel auto-combustion green synthesis method has been used with lemon juice as a capping agent. The prepared SrFe12O19–SrTiO3 nanocomposites were characterized by using several techniques to characterize their structural, morphological and magnetic properties. The crystal structures of the nanocomposite were investigated via X-ray diffraction (XRD). The morphology of SrFe12O19– SrTiO3 nanocomposite was studied by using a scanning electron microscope (SEM). The elemental composition of the materials was analyzed by an energy-dispersive X-ray (EDX). Magnetic properties and hysteresis loop of nanopowder were characterized via vibrating sample magnetometer (VSM) in the room temperature. Fourier transform infrared spectroscopy (FTIR) spectra of the samples showed the molecular bands of nanoparticles. Also, the photocatalytic behavior of nanocomposites has been checked by the degradation of azo dyes under irradiation of ultraviolet light.

中文翻译：

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六铁氧体锶钙钛矿锶光催化剂纳米复合材料的绿色合成与表征

摘要 本研究介绍了一种通过绿色自燃法合成 SrFe12O19-SrTiO3 纳米复合材料的方法。首先，合成 SrFe12O19 纳米粒子作为核，然后制备 SrTiO3 纳米粒子作为壳，用于制造 SrFe12O19-SrTiO3 纳米复合材料。一种以柠檬汁为封端剂的溶胶-凝胶自燃绿色合成新方法。制备的 SrFe12O19-SrTiO3 纳米复合材料通过使用多种技术来表征其结构、形态和磁性。通过X射线衍射（XRD）研究纳米复合材料的晶体结构。通过使用扫描电子显微镜 (SEM) 研究了 SrFe12O19-SrTiO3 纳米复合材料的形貌。通过能量色散 X 射线 (EDX) 分析材料的元素组成。在室温下通过振动样品磁强计（VSM）表征纳米粉体的磁特性和磁滞回线。样品的傅里叶变换红外光谱 (FTIR) 光谱显示了纳米颗粒的分子带。此外，纳米复合材料的光催化行为已通过偶氮染料在紫外光照射下的降解来检验。