W,N共掺杂TiO_2/SiO_2/Fe_3O_4磁性光催化剂研究

Study on Magnetic W,N-codoped TiO_2/SiO_2/Fe_3O_4 Photocatalyst

以Fe3O4纳米颗粒为内核,SiO2惰性层为隔离层和钛酸四正丁酯为前驱体,钨酸铵、硝酸铵为掺杂源,采用低温溶胶法制备磁负载型的钨、氮共掺杂二氧化钛磁性光催化剂;通过XRD、SEM、DRS和IR等表征手段,对低温溶胶制备磁负载型的钨、氮共掺杂的二氧化钛磁性光催化剂的性质进行研究。结果表明:催化剂为锐钛矿晶型,球形纳米颗粒,禁带宽度降低了0.66eV。以氙灯模拟太阳光降解甲基橙,光照1h,催化剂降解率均达到90%以上。

Using Fe3O4 nanoparticles as the kernel,SiO2 inert layer as the isolation layer,tetra-n-butyl titanate as the precursor,ammonium tungstate and ammonium nitrate as doping sources,magnetic W,Ncodoped TiO2 photocatalyst was prepared by low-temperature sol method. The properties of the magnetic photocatalyst were investigated by XRD,SEM,DRS and IR. The results indicate that the magnetic W,N-codoped TiO2 photocatalyst is spherical anatase nanoparticle with forbidden band width decreased by0. 66 e V. Under irradiation of xenon lamp for the simulated degradation of methyl orange by sunlight,the degradation rate of methyl orange can exceed 90% with 1 h of irradiation in presence of the magnetic W,N-codoped TiO2 photocatalyst.