Synthesis and photocatalytic oxidation properties of iron doped titanium dioxide nanosemiconductor particles

Li, Xinyong; Yue, Po Lock; Kutal, Charles

doi:10.1039/b301998e

Cited by 124 publications

(79 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…is close to that of Ti 4? , special efforts have been dedicated to doping TiO 2 with Fe [6][7][8][9][10][11][12][13][14][15][16][17]. It has been reported that Fe ions can act as shallow charge traps in the TiO 2 lattice and result in high photocatalytic activity [1,18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization of Fe-doped TiO2 Nanotubes with High Photocatalytic Activity

et al. 2009

View full text Add to dashboard Cite

Fe-doped titanate nanotubes were prepared by the combination of sol-gel process with hydrothermal treatment. After a further calcinations process, Fe-doped TiO 2 nanotubes (Fe/TiO 2 NTs) with high photocatalytic activity were obtained. The prepared catalysts were characterized by XRD, TEM, and XPS. The photocatlytic activity of Fe/TiO 2 NTs was evaluated through the photodegradation of aqueous methyl orange. The experiments demonstrated that the 0.5% Fe/TiO 2 NTs calcined at 300°C possessed the best photocatalytic activity. Compared with pure TiO 2 nanotubes, the doping with Fe significantly enhanced the photocatalytic efficiency.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization of Fe-doped TiO2 Nanotubes with High Photocatalytic Activity

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Another way of extending the TiO 2 spectral response and of improving its photoreactivity is doping with transition metals. Doping with transition metal ions including Cr [9], V [10], Fe [11], Pb [12], and others have been investigated [1]. Choi et al [13] found that the photoreactivity of doped TiO 2 appears to be a complex function of the dopant concentration, the energy level of dopants within the TiO 2 lattice, their d-electronic configuration, the distribution of dopants, the electron donor concentration, and the light intensity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Bi³⁺‐TiO₂ and its Photocatalytic Activity

et al. 2007

View full text Add to dashboard Cite

Bi3+ -TiO 2 photocatalysts were prepared by doping bismuth ion into the TiO 2 structure in a sol-gel process. The catalyst samples were then characterized by UV-vis diffuse reflectance spectra (DRS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and transmission electron microscopy (TEM). Rodamine-B (RhB) was used in this study as a model chemical with the aim of organic pollutants control. The photocatalytic degradation of RhB demonstrated that an optimal loading of bismuth 0.7 at. % achieved the highest photodegradation rate, with the rate constant increasing by a factor of 3.89 over neat TiO 2 (P25) under UV illumination (k ≥ 320 nm). The degradation of p-nitrobenzonic acid (pNBA) was also examined to prevent/preclude/exclude/ the photosensitization pathway. GC-MS results show that pNBA can be effectively degraded and minerized to small molecules, such as quinone, acetic acid and formic acid.

show abstract

“…Two kinds of materials are often doped in TiO 2 to extend the optical absorbance: (1) metal ions, such as Cr, V, Fe, Pb, Cu, etc. [3][4][5][6]. They can extend the photoresponse of TiO 2 to the visible light region, however, the doped metal ions can also play the role of the recombination centers to reduce its photocatalytic activity [7]; (2) nonmetalic ions, such as C, N, F, P, S, etc.…”

mentioning

confidence: 99%

A novel TiO2 with a large amount of bulk intrinsic defects—Visible-light-responded photocatalytic activity induced by foreign trap

Zhang

Jin

et al. 2013

Chin. Sci. Bull.

View full text Add to dashboard Cite

A novel TiO 2 (anatase) containing a large amount of single electron trapped oxygen vacancies (SETOV) was prepared by dehydration of titanic acid nanotubes. This novel TiO 2 contains high concentration intrinsic defects in bulk structure, while its surface still remains the stoichiometric structure to protect them. And this novel TiO 2 itself has the visible light absorption without any doping, so we call it as the third generation of TiO 2 . However, it is regretted that this novel TiO 2 (A) only has photocatalytic activity under UV light irradiation, and was inactive for the visible light. The true reasons for this phenomenon were investigated by the transient IR absorption and photoluminescence spectra. Through constructing the foreign electron traps (PdO, PtO 2 ), the photocatalytic oxidation of propylene under visible light irradiation was successfully achieved. The removal yield of propylene (C 3 H 6 ) reached 7.6% and 28% on 2 wt.% PtO 2 /novel TiO 2 and 2 wt.% PdO/novel TiO 2 , respectively. By comparison with the noble metal electron traps (Pt, Pd), we found that the effective foreign electron traps need to satisfy two conditions: (1) Fe, Pb, Cu,. They can extend the photoresponse of TiO 2 to the visible light region, however, the doped metal ions can also play the role of the recombination centers to reduce its photocatalytic activity [7]; (2) nonmetalic ions, such as C, N, F, P, S, etc. Recently, much attention has been focused on the nitrogen doping [8][9][10][11][12][13]. It should be emphasized is that the origin of the visible-lightresponded photocatalytic activity of N-doped TiO 2 still remains disputable [14][15][16][17][18][19]. The redox potential of the doped nitrogen (e.g. -NO) exists within V cb to V vb of TiO 2 [20], so the photoelectrochemical stability of the N-doped TiO 2 may be a question for the practical application. In addition to the non-intrinsic defects can make the photo-response of TiO 2 red-shift, the intrinsic defects can also play the same role. As well known, when TiO 2 was reduced in H 2 atmosphere or treated under vacuum at high temperature, two kinds of intrinsic defects (i.e. oxygen vacancies denoted as V o˙˙, and Ti 3+ ) would form on TiO 2 surface simultaneously [21][22][23]. The energy levels of both in-

show abstract

Synthesis and photocatalytic oxidation properties of iron doped titanium dioxide nanosemiconductor particles

Cited by 124 publications

References 23 publications

Synthesis, Characterization of Fe-doped TiO2 Nanotubes with High Photocatalytic Activity

Synthesis, Characterization of Fe-doped TiO2 Nanotubes with High Photocatalytic Activity

Preparation and Characterization of Bi³⁺‐TiO₂ and its Photocatalytic Activity

A novel TiO2 with a large amount of bulk intrinsic defects—Visible-light-responded photocatalytic activity induced by foreign trap

Contact Info

Product

Resources

About

Synthesis and photocatalytic oxidation properties of iron doped titanium dioxide nanosemiconductor particles

Cited by 124 publications

References 23 publications

Synthesis, Characterization of Fe-doped TiO2 Nanotubes with High Photocatalytic Activity

Synthesis, Characterization of Fe-doped TiO2 Nanotubes with High Photocatalytic Activity

Preparation and Characterization of Bi3+‐TiO2 and its Photocatalytic Activity

A novel TiO2 with a large amount of bulk intrinsic defects—Visible-light-responded photocatalytic activity induced by foreign trap

Contact Info

Product

Resources

About

Preparation and Characterization of Bi³⁺‐TiO₂ and its Photocatalytic Activity