NiFe2O4/TiO2纳米颗粒材料的磁性及光催化性能研究

Study of magnetic and photocatalytic properties of NiFe2O4/TiO2 nanoparticles

采用水热合成工艺制备了NiFe2O4纳米颗粒材料与NiFe2O4/TiO2纳米复合材料,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)对样品的微观结构与形貌进行了测试与表征,利用振动样品磁强计(VSM)对样品的磁学性能进行了测试与分析,并研究了NiFe2O4/TiO2纳米复合材料对罗丹明(RhB)的光催化降解性能.研究表明,反应温度对NiFe2O4样品的微观结构与磁性有重要的影响,软磁相NiFe2O4的存在不但有效地提高了NiFe2O4/TiO2纳米复合材料光催化性能,而且赋予了其良好的磁分离特性.

In this paper,NiFe2O4 nanoparticles and NiFe2O4/TiO2 nanocomposites were prepared by hydrothermal synthesis process.The microstructure and morphology of the samples were measured and observed by X-ray diffractometer(XRD)and scanning electron microscope(SEM).The magnetic properties of the samples were characterized and analyzed using a vibrating sample magnetometer(VSM).And the photocatalytic degradation performance of RhB for NiFe2O4/TiO2 nanocomposites was investigated.The result shows that the reaction temperature has an important effect on the microstructure and magnetic properties of NiFe2O4 samples.The presence of soft magnetic phase NiFe2O4 not only effectively improves the photocatalytic properties of NiFe2O4/TiO2 nanocomposites,but also endows them with good magnetic separation properties.