共掺杂型TiO2可见光催化剂的制备 表征及其性能分析.docx

1··1!| 1 i1 tl J，-hFi-- |11 ! 』!1 ·』·4 删蚪磐鞘 删蚪磐鞘Y1 940977 黑龙江大学硕士学位论文 Abstract Nano—sized Ti02 photocatalytic technology has developed to be a kind of hi出 efficient and environmental pollution control technologies．The current research focuses on the enhancement of photocatalytic activity and the efficiency of utilizing visible—light． Based on the current research of photocatalyst doping Ti02 home and abroad，tri—doped Ti02 nRno-particles were synthetized in this paper．The structures and physical and chemical properties of the as··prepared samples were characterized by X--ray diffraction ㈣)，nitrogen adsorption／desorption measurements(BET)，Raman spectroscopy (Raman)，X—ray photoelectron spectroscopy(xPs)，Fourier transition infrared spectra fFT-rR)，scanning electron microscopy(SEM)，transmission electron microscopy (TEM)，UV-Vis diffuse reflectance spectroscopy(DRS)and surface photo-voltage spectroscopy(SPS)．The photocatalytic activities of the tri-doped Ti02 photocatalysts were evaluated缸ou曲me de伊ad撕0n of RjlB and phen01 uIlder visible·119ht P irradiation,which were compared with the behaviors of the home-made pure Ti02 and commercial Degussa P25Ti02．In addition，the mechanisms of the enhancement of visible—light photocatalytic activity of the tri-doped Ti02 nano-particles were analyzed in detailed． (1)Fe-N—S-tridoped Ti02 photocatalyst was prepared via a sol-gel process by using ammonium ferrous sulfate as dopant．The effects of the doping dosage and calcining temperature on the structure and photocatalytic activity of the tri—doped Ti02 photocatalysts were investigated．The results showed that the extension of light absorption edge in the range of visible—light Was up to 670nm．The modified Ti02 calcined at 350℃with 1．0 m01％ammoniunl ferrous sulfate content exhibited the best photocatalytic performance．Under the visible—light irradiation、析m 1 20min,the removal rate for RhB could achieve 91．5％． ．1I． 喻 Abstract(2)C-N—S-tridoped Abstract (2)C-N—S-tridoped Ti02 phot