Crystal Structure and Photocatalytic Characteristics of Nanoscate Sb-doped TiO_2 Thin Films  

Sb掺杂纳米TiO_2光催化剂的晶体结构与光催化性能(英文)

作　　者：任达森[1] 章壮健[1] 

机构地区：[1]复旦大学材料科学系

出　　处：《Chinese Journal of Chemical Physics》2006年第6期549-554,共6页化学物理学报（英文）

摘　　要：Nanoscale Sb doped titanium dioxide thin films photocatalyst （Ti1-xSbO2） were obtained from dip-coating sol-gel method. The influence of dopant Sb density on the crystal structure and the phase transformation of the thin tilms were characterized by X-ray diffraction （XRD） and Raman spectra. The results of XRD showed that as prepared lilms were not only in anatase state but also in brookite. The crystalline size was estimated to be around 13.3-20 nm. Raman spectra indicated there coexisted other phases and a transformation from brookite to anatase in the samples doped with 0.2% Sb. After doping a proper amount of Sb, the cryst,allization rate and the content of the anatase Ti1-x, SbO2 in the thin films was clearly enhanced because Sb replaced part. of the Ti of TiO2 in the thin films. The anode current density （photocurrent density） and the first order reaction speed constant （k） of t.hin films doped with 0.2% Sb reached 42.49 μA/cm^2 and 0.171 h/cm^2 under 254 nm UV illumination, respectively, which is about 11 times and 2 times that of the non doped TiO2 anode prepared by the same method respectively.

关 键 词：Crystal structure XRD pattern Raman spectra ANATASE DOPANT Anode current density 

分 类 号：O643.36[理学—物理化学]