title: Ultrasound-assisted synthesis and visible-light-driven photocatalytic activity of Fe-incorporated TiO2 nanotube array photocatalysts.
abstract: Fe incorporated TiO(2) nanotube arrays (Fe-TiO(2)NTs) were prepared by an ultrasound-assisted impregnating-calcination method. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectroscopy (DRS) indicated that α-Fe(2)O(3) nanoparticles were deposited into the TiO(2) nanotubes, and in the mean time, some Fe(3+) ions were doped into TiO(2) lattice. The absorption of Fe-TiO(2)NTs in the visible light region increased with the increase of Fe content. The photocatalytic activity of Fe-TiO(2)NTs was evaluated by the degradation of methylene blue aqueous solution under visible light irradiation. The results demonstrated that the Fe-TiO(2)NTs exhibited significantly enhanced photocatalytic activity compared with pure TiO(2)NTs. Photoluminescence (PL) and electrochemical impedance spectroscopy (EIS) analyses further confirmed that the increased photocatalytic activity of the Fe-TiO(2)NTs was attributed to an enhanced separation and transfer of photogenerated charge carriers.
authors: Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
authors: Qi
authors: Q
authors: Wu
authors: Junjie
authors: J
authors: Ouyang
authors: Kunpeng
authors: K
authors: Xie
authors: Lan
authors: L
authors: Sun
authors: Mengye
authors: M
authors: Wang
authors: Changjian
authors: C
authors: Lin
mesh_terms: D002384:Catalysis; D007501:Iron / Q000737:chemistry*; D008027:Light; D008751:Methylene Blue / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D043942:Nanotubes; D010777:Photochemistry; D056951:Photoelectron Spectroscopy; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000737:chemistry*; D014465:Ultrasonics; D014961:X-Ray Diffraction
chemical_list: C009495:titanium dioxide; D014025:Titanium; D007501:Iron; D008751:Methylene Blue