Recyclable Fe3O4/SiO2/TiO2/Cu nanocomposites: synthesis, characterization and investigation of the photocatalytic and magnetic property
Recyclable Fe3O4/SiO2/TiO2/Cu nanocomposites: synthesis, characterization and investigation of the photocatalytic and magnetic property
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DOI：
10.1007/s10854-017-6688-x
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
S. Mohammadi-Aghdam;Bijan Sarkhosh;Nastaran N. Tajoddin
中科院分区：
文献类型：
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作者：
S. Mohammadi-Aghdam;Bijan Sarkhosh;Nastaran N. Tajoddin
本研究首先采用共沉淀法和溶胶-凝胶法相结合的方法合成了Fe3O4/SiO2/ tio2纳米结构。下一步，以Cu(NO3)2·3H2O为铜前驱体，通过光沉积法制备Fe3O4/SiO2/TiO2/Cu纳米复合材料。采用x射线衍射、扫描电镜、能量色散x射线显微分析、透射电镜、耦合等离子体发射光谱、振动样品磁强计和傅里叶变换红外技术对制备的样品进行了表征。考察了Fe3O4/SiO2/TiO2纳米催化剂和磁响应Fe3O4/SiO2/TiO2/Cu纳米催化剂在室温下对亚甲基蓝染料的降解效率。制备的Fe3O4/SiO2/TiO2/Cu光催化剂在染料水溶液脱色中表现出良好的光催化性能。磁性纳米复合材料具有在外加磁场作用下完全恢复的优点。复合纳米颗粒在5次分离循环中表现出较高的回收效率和稳定性。
In this study, at first, Fe3O4/SiO2/TiO2nanostructures were synthesized using a combination of co-precipitation and sol–gel methods. At the next step Fe3O4/SiO2/TiO2/Cu nanocomposite was synthesized using Cu(NO3)2·3H2O as copper precursor via photodeposition method. The as prepared samples were characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray microanalysis, Transmission electron microscope, coupled plasma optical emission spectrometry, vibrating sample magnetometer and Fourier transform infrared techniques. The catalytic efficiency of the Fe3O4/SiO2/TiO2and magnetically responsive Fe3O4/SiO2/TiO2/Cu nanocatalysts was evaluated for the degradation of methylene blue dye under UV irradiation at the room temperature. The as prepared Fe3O4/SiO2/TiO2/Cu photocatalyst presented a good photocatalytic performance in the decolorization of the dye aqueous solution. The magnetic nanocomposites have the preponderance to be completely recoverable with the application of an external magnetic field. The composite nanoparticles showed high recycling efficiency and stability over five separation cycles.