Study on Magnetic W,N-codoped TiO2/SiO2/Fe3O4 Photocatalyst
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摘要: 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。Abstract: 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 by 0.66 eV. 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.
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Key words:
- TiO2 /
- magnetic photocatalyst /
- low-temperature sol process /
- codope /
- isolated layer /
- magnetic loading /
- kernel
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