Preparation and characterization of Rb-doped TiO_(2) powders for photocatalytic applications  

作　　者：Lu Jia Li-Mei Yang Wei Wang Song-Tao Huang Zheng Xu 

机构地区：[1]National Engineering Laboratory of Biohydrometallurgy,General Research Institute for Nonferrous Metals,Beijing,100088,China

出　　处：《Rare Metals》2024年第2期555-561,共7页稀有金属（英文版）

基　　金：This study was financially supported by the Science and Technology Project of Beijing(No.Z151100003315016).

摘　　要：TiO_(2)nanoparticles doped with different concentrations of Rb were prepared by sol–gel method.The crystal structures of samples were characterized by X-ray diffraction(XRD)and transmission electron microscopy(TEM).It was confirmed by the Rietveld refinement method that the as-prepared samples crystallize in anatase phase and Rb doping induces expansion and distortion of the crystal lattice.Compared with the pure TiO_(2),the Rb-doped nanoparticles have smaller crystal size and better dispersibility.Degradation rate of methylene blue was used to evaluate the photocatalytic activity of Rb–TiO_(2).It indicated that doping Rb into TiO_(2)can effectively improve the photocatalytic activity of TiO_(2)and the mechanisms were discussed in detail.When using the sample doped with 0.20%Rb,methylene blue degraded with the fastest rate(97%within 60 min).

关 键 词：Rb doping TiO_(2) PHOTOCATALYSIS SOL-GEL 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]