Synthesis and Characterization of Magnetic TiO-2/SiO-2/NiFe-2O4 Composite Photocatalysts
Magnetic TiO_2/SiO_2/NiFe_2O_4 composite photocatalytic particles with high crystalline TiO_2 shell were synthesized via a mild solution route.The prepared composite particles were characterized with X-ray diffrac-tion(XRD),transmission electron microscopy(TEM),high resolution transmission electron microscopy(HRTEM),scanning electron microscopy(SEM),ultraviolet-visible(UV-Vis) spectroscopy and vibrating sample magnetome-ter(VSM).The results show that the obtained TiO_2/SiO_2/NiFe_2O_4 composite particles were composed of spherical nanoparticles,about 30 nm in diameter,with several NiFe_2O_4 fine particles about 20 nm in diameter as cores and silica as coatings and barrier layers between the magnetic cores and titania shells.The photocatalytic activity of the composite photocatalytic particles was also investigated for the degradation of Basic Violet 5BN(BV5) under UV irradiation.About 97% of original BV5 decomposed in 360 min in the presence of magnetic composite nanoparticles under UV light.The synthesized magnetic composite nanoparticles exhibited high photocatalytic efficiency that would find potential application to cleaning polluted water with the help of magnetic separation.
作 者： YUAN Jin L(U) Yong-kang LI Yu LI Jun-ping 作者单位： YUAN Jin,L(U) Yong-kang(School of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,P.R.China)LI Yu,LI Jun-ping(School of Chemical Engineering and Environment,North University of China,Taiyuan 030051,P.R.China)
刊 名： 高等学校化学研究（英文版） ISTIC SCI 英文刊名： CHEMICAL RESEARCH IN CHINESE UNIVERSITIES 年，卷(期)： 2010 26(2) 分类号： O6 关键词： Magnetic photocatalyst Titania Coating Nickel ferrite