A Novel Method for Preparing V-doped Titanium Dioxide Thin Film Photocatalysts with High Photocatalytic Activity Under Visible Light Irradiation

Gu, Deen; Yang, Bong-Jun; Hu, Yongda

doi:10.1007/s10562-007-9179-5

Cited by 62 publications

(23 citation statements)

References 37 publications

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“…However, the majority of the simple and mixed-metal oxides photocatalysts are primarily active for H 2 production under UV irradiation (l < 385 nm or E g $ 3.0 eV) present in only a small portion of solar light. More recently, there is a focused effort on the development of photocatalysts that are capable of using visible light (l ¼ 400-700 nm) for the photocatalytic production of H 2 including transition metal doping (e.g., platinum, 29 chromium, 30 and vanadium 31 ) and nonmetallic element doping (e.g., nitrogen, [32][33][34][35] sulfur, 36,37 and carbon 35,38 ). CdS, n-type semiconductor with E g ¼ 2.4 eV, has been shown to have photocatalytic activity for H 2 production under visible light irradiation, although, sacrificial electron donors such as C 2 H 5 OH, 39 HS À , 40,41 or SO 3 2À 19 are used to obtain measurable rates of H 2 production and to avoid the photocorrosion of CdS in the presence of O 2 .…”

Section: -17mentioning

confidence: 99%

Photocatalytic production of hydrogen on Ni/NiO/KNbO3/CdS nanocomposites using visible light

et al. 2008

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3. Enhanced activity is most likely due to effective charge separation of photogenerated electrons and holes in CdS that is achieved by electron injection into the conduction band of KNbO 3 and the reduced states of niobium (e.g., Nb(IV) and Nb(III)) are shown to contribute to enhanced reactivity in the KNbO 3 composites by mediating effective electron transfer to bound protons. We also observed that the efficient attachment of Q-size CdS and the deposition of nickel on the KNbO 3 surface increases H 2 production rates. Other factors that influence the rate of H 2 production including the nature of the electron donors and the solution pH were also determined. The Ni/NiO/KNbO 3 /CdS nanocomposite system appears to be a promising candidate for possible practical applications including the production of H 2 under visible light.

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Section: -17mentioning

confidence: 99%

Photocatalytic production of hydrogen on Ni/NiO/KNbO3/CdS nanocomposites using visible light

et al. 2008

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“…4,5,6,7]. VO x (specifically including V 2 O 5 ) particles on TiO 2 are known to be particularly catalytically active [8], while doping bulk TiO 2 with transition metals [9], and particularly with vanadium [10,11,12,13], offers a route to lowering the band gap of the pure oxide (~3 eV), thus allowing photoactivation to occur with light in the visible spectral range [14 ].…”

Section: Introductionmentioning

confidence: 99%

V-doped TiO2(110): Quantitative structure determination using energy scanned photoelectron diffraction

et al. 2014

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The surface structure of a novel vanadium-titanium dioxide epitaxial film (Ti 1-x V x O 2 , x ~ 0.2) has been explored using V 4+ 2p and Ti 4+ 2p energy-scanned photoelectron diffraction (PhD). The determined structure is a rutile TiO 2 (110)-like surface, with V atoms substitutionally replacing some Ti atoms. The results show no evidence for significant preferential occupation by V atoms of any specific surface or sub-surface sites. LEED shows a (1x2) reconstruction to be present on the surface, and the PhD simulations do favour this being the dominant surface termination, although the reliability factor for simulations for a (1x1) termination falls just within the variance of the value for the preferred (1x2) structure. The V 3+ and Ti 3+ species were observed to occupy the same sites as the V 4+ and Ti 4+ species; V 5+ species do not appear to occupy a single well-defined structural site.

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“…However, there are still some disadvantages, such as the lack of visible light response, low quantum yield and lower photocatalytic activity. In order to overcome these problems, some strategies have been investigated, including noble metal deposition, doping of metal or nonmetal ions, mixing with another metal oxide, surface photosensitization with dye and preparing composites with organic polymer [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Improving the photocatalytic performance of conducting polymer polythiophene sensitized TiO2 nanoparticles under sunlight irradiation

Wei

et al. 2010

Reac Kinet Mech Cat

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Titanium dioxide (TiO 2 ), polythiophene and polythiophene/TiO 2 were prepared by sol-gel and solid-state reaction methods. Water-free iron(III) chloride (FeCl 3 ) was used as an oxidant. The phase composition, morphology and the spectral properties of the products were characterized by XRD, TEM, UV-Vis and FT-IR techniques. The photocatalytic activity of the products was evaluated by the degradation of methyl orange under sunlight irradiation. TEM results showed that the polythiophene/TiO 2 composite particles were well dispersed, rod-like shaped with 20 9 80 nm dimensions. UV-Vis analysis indicated that the absorption edge of polythiophene/TiO 2 was 605 nm. Compared with the unmodified TiO 2 and bare polythiophene, polythiophene/TiO 2 exhibited largely enhanced activity for the photocatalytic degradation of methyl orange under sunlight irradiation. A degradation efficiency of methyl orange of 85.6% could be obtained within 120 min. The sensitization mechanism of polythiophene for the TiO 2 photocatalyst is discussed briefly.

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A Novel Method for Preparing V-doped Titanium Dioxide Thin Film Photocatalysts with High Photocatalytic Activity Under Visible Light Irradiation

Cited by 62 publications

References 37 publications

Photocatalytic production of hydrogen on Ni/NiO/KNbO3/CdS nanocomposites using visible light

Photocatalytic production of hydrogen on Ni/NiO/KNbO3/CdS nanocomposites using visible light

V-doped TiO2(110): Quantitative structure determination using energy scanned photoelectron diffraction

Improving the photocatalytic performance of conducting polymer polythiophene sensitized TiO2 nanoparticles under sunlight irradiation

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