2008
DOI: 10.1021/jp803291c
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A Visible Light-Driven Titanium Dioxide Photocatalyst Codoped with Lanthanum and Iodine: An Application in the Degradation of Oxalic Acid

Abstract: A series of photocatalysts was synthesized by codoping TiO 2 with lanthanum and iodine (La-I-TiO 2 ). The structure and properties of the catalysts were studied by X-ray diffraction (XRD), the Brunauer-Emmett-Teller (BET) method, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectra. The prepared anatase-phase La-I-TiO 2 (molar ratio 20:20:100) calcined at 400 °C had a BET surface area of 92.9 m 2 g -1 , and the crystallite size calculated from X… Show more

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Cited by 103 publications
(65 citation statements)
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“…However when Nd was in excess, the space of charge region would become very narrow. The depth of penetration of light into TiO 2 would greatly exceed the space charge layer, and the recombination of the photoinduced electron-hole pairs became easier [22].…”
Section: Photocatalytic Activity Testingmentioning
confidence: 99%
See 1 more Smart Citation
“…However when Nd was in excess, the space of charge region would become very narrow. The depth of penetration of light into TiO 2 would greatly exceed the space charge layer, and the recombination of the photoinduced electron-hole pairs became easier [22].…”
Section: Photocatalytic Activity Testingmentioning
confidence: 99%
“…Particularly, according to Tojo et al [19], the photo-absorption in the visible region for I doped TiO 2 was much better than N doped TiO 2 . Recently, Zhao et al [ He et al [22] suggested that, by modification with a nonmetal and a metal oxide, the doped TiO 2 not only can be excited with visible light, but also its catalytic activity was enhanced.…”
Section: Introductionmentioning
confidence: 99%
“…25 Kato ) and TiO 2 codoped with Rh 3+ and Sb 5+ were also shown to improve photocatalytic activity for O 2 evolution under visible light irradiation. 27,28 However, there have been relatively few studies reported for double metal ion codoping of TiO 2 , while TiO 2 codoped with two nonmetallic elements (e.g., N and F codoping, 29,30 N and S codoping 31,32 ) or with metal ions and nonmetallic elements [33][34][35][36][37][38][39] (e.g., Cr and N codoping 35 Pt and N codoping, 36 V and N codoping, 37 …”
Section: Introductionmentioning
confidence: 99%
“…Since nitrogendoped TiO 2 was first reported by Asahi et al [3], doping with non-metals such as N [3,[16][17][18][19], C [20], B [21][22][23][24], S [25], I [26] and F [27,28], has received a great deal of attention. Although these doped TiO 2 photocatalysts do have a response in the visible light region, there is no guarantee that they will enhance the photocatalytic activity [23].…”
Section: Introductionmentioning
confidence: 99%
“…Recently, lanthanum and iodine co-doped titania has been synthesized by He et al Their results showed that lanthanum can act as a barrier and thus facilitate charge carrier separation while the dopant lanthanum can create a Ti 3+ state, which retards the recombination of electron-hole pairs and extends the absorption into the visible light region. Moreover, the dopant iodine enters the lattice of TiO 2 and then I 5+ replaces Ti 4+ to maintain the charge balance [26]. Three positive roles for the fluorine dopant during photocatalysis are considered.…”
Section: Introductionmentioning
confidence: 99%