A facile strategy was introduced for the development of pure MgO and its nanocomposites using different CeO2 contents (3% to 7%) to enhance the magnetic properties and their photocatalytic performance. Different morphologies (viz. nanoflowers and rhombohedral type nanostructures) were obtained using in-situ hydrothermal method at different concentrations of CeO2. X-ray diffraction results revealed that peaks of CeO2 were observed along with peaks of MgO which confirms the presence of both the phases. Crystallite size and particle size were found to increase with changing CeO2 content in host matrix of MgO. Moreover, the band gap reduces while magnetic character increases with CeO2 concentration. Magnetic behaviour of nanocomposites was elucidated on the basis of oxygen intrinsic defects which are persistent through XPS. EPR measurement was carried to understand the valance electron and favours the defects present in the material which is related with size of the nanostructures. Degradation of Rose Bengal dye was accomplished to probe the photocatalytic activity of MgO@CeO2 nanocomposites. Hence facial synthesis of these nanostructures conveyed good magnetic properties along with its application towards dye degradation.

中文翻译：

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用于改善磁性和光催化性能的分级氧化镁锚定氧化铈纳米复合材料

引入了一种简单的策略来开发纯 MgO 及其使用不同 CeO2 含量（3% 至 7%）的纳米复合材料，以提高磁性和光催化性能。使用原位水热法在不同浓度的 CeO2 下获得了不同的形态（即纳米花和菱形纳米结构）。X 射线衍射结果表明，CeO2 的峰与 MgO 的峰一起被观察到，这证实了两相的存在。发现微晶尺寸和颗粒尺寸随着 MgO 基质中 CeO2 含量的变化而增加。此外，随着 CeO2 浓度的增加，带隙减小而磁性增加。基于通过 XPS 持续存在的氧固有缺陷来阐明纳米复合材料的磁行为。进行 EPR 测量以了解价电子，并有利于材料中存在的与纳米结构尺寸相关的缺陷。完成了玫瑰红染料的降解以探测 MgO@CeO2 纳米复合材料的光催化活性。因此，这些纳米结构的面部合成具有良好的磁性及其在染料降解方面的应用。