Phosphotungstic acid supported on magnetic core-shell nanoparticles with high photocatalytic activity

作者：Hou, Yang; Ma, Jicheng; Wang, Ting; Fu, Qiang^*

来源：Materials Science in Semiconductor Processing, 2015, 39: 229-234.

DOI：10.1016/j.mssp.2015.05.015

• Heteropolyacids
• Core-shell nanoparticles
• Photocatalysis
• Magnetic property

Fe3O4@SiO2@HPW (12-tungstophosphoric acid) nanoparticles have been successfully obtained by a simple solvothermal and impregnation process. The as-obtained products were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), fourier transform infrared spectrum (FT-IR), inductively coupled plasma (ICP) and MPM5-XL-5 superconducting quantum interference device (SQUID). The results revealed that the heteropolyacids were successfully grown on the Fe3O4@SiO2 nanoparticles. The photocatalytic studies suggested that the Fe3O4@SiO2@HPW nanoparticles show excellent photocatalytic efficiency for the degradation of Rhodamine B (RB) under UV light irradiation. More importantly, the obtained nanopartides (Fe3O4@SiO2@HPW) could be effectively separated for reuse by simply applying an external magnetic field. Furthermore, the synthesized nanoparticles could keep their efficiency till four cycles.

• 出版日期2015-11
• 单位东北师范大学