Enhanced photocatalytic oxidation of propylene over V-doped TiO2 photocatalyst: Reaction mechanism between V5+ and single-electron-trapped oxygen vacancy

Ren, Fengzhu; Li, Haiyan; Wang, Yuanxu; Yang, Jianjun

doi:10.1016/j.apcatb.2015.03.050

Cited by 83 publications

(43 citation statements)

References 64 publications

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“…Surface Ti-F electronegative groups can act as trapping sites for photo-generated electrons and facilitate transfer to surface-adsorbed CO 2 molecules [42]. It is worth mentioning that a novel anatase TiO 2 was obtained [46,47]. Here we also tested single-electrontrapped oxygen vacancies (Vo˙ ) of TiO 2 -0HF and TiO 2 -0.2HF, as shown in Fig.…”

Section: Photocatalytic Activitymentioning

confidence: 95%

“…NTA is thermally unstable and transformed to a novel anatase TiO 2 with large BET surface areas and high concentration of single-electrontrapped oxygen vacancies (V o . ) during calcining, accompanied by collapse of tubular morphology [45][46][47]. F − is easily adsorbed in and outside surface of the nanotube, which help the (001) facets of TiO 2 exposed during structure reorganization.…”

Section: Introductionmentioning

confidence: 99%

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Surface heterojunction between (001) and (101) facets of ultrafine anatase TiO2 nanocrystals for highly efficient photoreduction CO2 to CH4

Cao

et al. 2016

Applied Catalysis B: Environmental

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124

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Section: Photocatalytic Activitymentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Surface heterojunction between (001) and (101) facets of ultrafine anatase TiO2 nanocrystals for highly efficient photoreduction CO2 to CH4

Cao

et al. 2016

Applied Catalysis B: Environmental

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124

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“…Heterogenous photocatalysts, namely, zinc oxide (ZnO) [3][4][5], titanium dioxide (TiO 2 ) [5][6][7][8], tungsten trioxide (WO 3 ) [9], ferric oxide (Fe 2 O 3 ) [10,11], copper oxide (Cu 2 O) [12], and tin dioxide (SnO 2 ) [13][14][15][16][17][18], have gained huge interest for environmental applications such as water disinfection, hazardous remediation, and water purification.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of Vanadium-Doped SnO₂ Nanoparticles in Rhodamine B Degradation

Letifi

Litaiem

Dridi

et al. 2019

Advances in Condensed Matter Physics

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In this paper, we have reported a novel photocatalytic study of vanadium-doped SnO2 nanoparticles (SnO2: V NPs) in rhodamine B degradation. These NPs have been prepared with vanadium concentrations varying from 0% to 4% via the coprecipitation method. Structural, morphological, and optical properties of the prepared nanoparticles have been investigated by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscope (TEM), and UV-Vis and photoluminescence (PL) spectroscopy. Structural properties showed that both undoped and SnO2: V NPs exhibited the tetragonal structure, and the average crystal size has been decreased from 20 nm to 10 nm with the increasing doping level of vanadium. Optical studies showed that the absorption edge of SnO2: V NPs showed a redshift with the increasing vanadium concentration. This redshift leads to the decrease in the optical band gap from 3.25 eV to 2.55 eV. A quenching in luminescence intensity has been observed in SnO2: V NPs, as compared to the undoped sample. Rhodamine B dye (RhB) has been used to study the photocatalytic degradation of all synthesized NPs. As compared to undoped SnO2 NPs, the photocatalytic activity of SnO2: V NPs has been improved. RhB dye was considerably degraded by 95% within 150 min over on the SnO2: V NPs.

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“…It could exist as dispersed monolayer isolated vanadyl [12], polymeric surface VO x species [20,22], V species in oligomeric structure [23]. Also, V can enter into the TiO 2 crystal lattice due to the very close ionic radius of V 4+ to that of Ti 4+ [24].…”

Section: Xps Analysismentioning

confidence: 99%

A Comparative Study in Vanadium and Tungsten Leaching from Various Sources of SCR Catalysts with Local Difference

Miao

et al. 2020

Sustainability

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Direct leaching with NaOH can be an economically acceptable method for vanadium (V) and tungsten (W) recovery from spent selective catalytic reduction (SCR) catalysts. However, different chemical-physical characteristics of catalysts would affect the V and W leaching. In this paper, the V and W leaching behavior of various sources of SCR catalysts with a local difference (yellow and gray color) were systematically investigated with alkali leaching solution under ambient pressure. Different leaching efficiencies from yellow and gray color areas were correlated with oxidation states and species of V and W on catalyst surfaces, as characterized by X-ray photoelectron spectroscopy (XPS), Raman, Fourier transform infrared spectroscopy (FTIR), and other analytic methods. For the V leaching efficiency, the samples from a gray area of catalysts (40.0-51.0%) were lower than that from the yellow area (66.8-69.8%). The higher molar ratio of V 3+ and a lower molar ratio of V 5+ , and the lower total V content on the surface of the samples from the gray area could be the main reasons for the lower V leaching efficiency. As for the W leaching efficiency, the samples from the gray area (44.6-57.3%) were slightly higher than that from the yellow area (38.0-52.6%) of catalysts. The less total W content of surface species and stronger interaction among V-W-Ti of yellow area samples resulted in the lower leaching efficiency. These differential leaching efficiencies needed to be taken into consideration for recovering V and W from spent SCR catalysts.

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Enhanced photocatalytic oxidation of propylene over V-doped TiO2 photocatalyst: Reaction mechanism between V5+ and single-electron-trapped oxygen vacancy

Cited by 83 publications

References 64 publications

Surface heterojunction between (001) and (101) facets of ultrafine anatase TiO2 nanocrystals for highly efficient photoreduction CO2 to CH4

Surface heterojunction between (001) and (101) facets of ultrafine anatase TiO2 nanocrystals for highly efficient photoreduction CO2 to CH4

Enhanced Photocatalytic Activity of Vanadium-Doped SnO₂ Nanoparticles in Rhodamine B Degradation

A Comparative Study in Vanadium and Tungsten Leaching from Various Sources of SCR Catalysts with Local Difference

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Enhanced photocatalytic oxidation of propylene over V-doped TiO2 photocatalyst: Reaction mechanism between V5+ and single-electron-trapped oxygen vacancy

Cited by 83 publications

References 64 publications

Surface heterojunction between (001) and (101) facets of ultrafine anatase TiO2 nanocrystals for highly efficient photoreduction CO2 to CH4

Surface heterojunction between (001) and (101) facets of ultrafine anatase TiO2 nanocrystals for highly efficient photoreduction CO2 to CH4

Enhanced Photocatalytic Activity of Vanadium-Doped SnO2 Nanoparticles in Rhodamine B Degradation

A Comparative Study in Vanadium and Tungsten Leaching from Various Sources of SCR Catalysts with Local Difference

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Product

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About

Enhanced Photocatalytic Activity of Vanadium-Doped SnO₂ Nanoparticles in Rhodamine B Degradation