Electrospun nanofibers of V-doped TiO2 with high photocatalytic activity

Zhang, Zhenyi; Shao, Changlu; Zhang, Lina; Li, Xinghua; Liu, Yichun

doi:10.1016/j.jcis.2010.05.067

Cited by 127 publications

(55 citation statements)

References 35 publications

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“…The preservation of anatase phase after metal doping was confirmed by Raman analysis. As observed by Fig.2, the significant vibration peaks of Raman spectra are centred at around 144, 196, 396, 516, and 638 cm -1 which are, respectively, the characteristic E g , E g , B 1g , A 1g ＋B 1g , and E g modes depicted by TiO 2 anatase phase [24,25]. Fig.…”

Section: Xrd Analysismentioning

confidence: 60%

Enhanced photocatalytic properties of reusable TiO 2 -loaded natural porous minerals in dye wastewater purification

et al. 2016

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Diatomite-based recyclable photocatalysts containing single lanthanide doped TiO 2 nanoparticles (NPs) were synthesized by using simple sol-gel method. Photocatalytic activities of the prepared Ce-or La-single doped TiO 2 /diatomite catalysts were estimated by the degradation of Rhodamine B (RhB) under simulated sunlight irradiation. The XRD and Raman spectra shown only anatase phase of TiO 2 for the un-doped and Ce-doped samples. The TEM images revealed uniform distribution of TiO 2 NPs on the matrix, indicating that diatomite played an important role to prevent the agglomeration of TiO 2 NPs. Ce-TiO 2 /diatomite showed a red shift in UV-visible light absorption edge with enhanced absorption intensity than un-doped sample, whereas La-TiO 2 /diatomite showed a blue shift. The bandgap energy of 1.5%-Ce doped sample is as low as 2.75 eV. The XPS spectra showed the presence of both Ce 3+ and Ce 4+ oxidation states for Ce dopant. The photoluminescence spectra of the Ce-doped samples showed first decrease in the recombination centers with the maximum decrease for 1.5%-Ce doped sample and then started increase with the increasing Ce in the samples. As compared to the La-doped samples, a desired behavior was observed for the Ce-doped hybrid due to the redox Ce 4+ /Ce 3+ pairs acting as electron scavengers and localized unoccupied Ce 4f level narrowing the band gap. The incorporation with diatomite as support of TiO 2 nanoparticles is contributed for the improved reusability and also gives a promising strategy to enable the application of nano-photocatalysts in a real wastewater remediation treatment.

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Section: Xrd Analysismentioning

confidence: 60%

Enhanced photocatalytic properties of reusable TiO 2 -loaded natural porous minerals in dye wastewater purification

et al. 2016

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“…Another possibility, V 3+ can be oxidized into higher oxidation state, such as V 4+ and V 5+ . Zhang, Shao, Zhang, Li & Liu (2010) has been reported the existence of V 4+ and V 5+ ions in nanofiber vanadium doped TiO2 revealed by X-Ray Photoelectron Spectroscopy (XPS). It was confirmed that charge compensation might be one of the reason that contribute for extended absorption of vanadium doped TiO2 in visible region.…”

Section: Fig 1 Powder X-ray Diffraction Data Of Undoped Tio2mentioning

confidence: 99%

Synthesis of Vanadium (III) Doped Anatase TiO2 by Solid State Reaction Method

Aini

Ningsih²

2018

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Article history Received Revised Accepted Available online Anatase of Titanium dioxide (TiO2) was doped with vanadium ions (V 3+ ), at doping levels ranging from 0.3, 0.5 to 0.7 atomic percentage in order to increase its photocatalytic activity under visible light irradiation. Vanadium doped TiO2 was synthesized by solid state reaction method. Its physicochemical properties characterized by powder X-ray diffraction (XRD) and UV-Vis diffuse reflectance spectroscopy (DRS). Doping with V(III) resulted in a single phase structure of anatase TiO2 with nanosize crystal ranging from 53.06 to 59.59 nm. Vanadium doping also resulted in a red-shift of the photophysical response of TiO2 that was reflected in an extended absorption in the visible light between 400 and 700 nm.

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“…Among transition metal ions, vanadium ion is attractive as dopant because it will generate an intermediate band so that absorption will happen in the visible region. Various methods have been selected to prepare V doped doped TiO 2 photocatalysts, such as a hydrothermal method [16], electro spinning technique [17], wet chemical method [14,18], sol-gel method [19,20], flame spray pyrolysis technique [21], and anodic oxidation [22].…”

Section: Introductionmentioning

confidence: 99%

Effect of V Dopant on Physicochemical Properties of Vanadium-Doped Anatase Synthesized via Simple Reflux Technique

2016

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Abstract. Mesoporous pure TiO 2 (M-TiO 2 ) and mesoporous-vanadium-doped TiO 2 (M-V-doped TiO 2 ) were successfully synthesized via a facile and simple reflux technique. The purpose of this research was to study the effect of vanadium dopant on the physicochemical properties of all materials obtained. Characterization of the prepared materials was carried out using X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) and N 2 -adsorptiondesorption analysis. The presence of Ti and O elements in M-TiO 2 and of Ti, V and O elements in M-V doped TiO 2 could be detected by SEM-EDS, while the patterns of X-ray diffraction of all the prepared samples had a well-crystalline surface of anatase type. All mesoporous vanadium-doped TiO 2 (M-V-doped TiO 2 ) materials performed in a highly transparent mode in the visible region at 554 nm (E g = 2.24 eV) and 588 nm (E g = 2.12 eV) for 3.3 and 4.9 wt% V doped TiO 2, respectively. The Rietveld refinement method was applied to extract the structural parameters of the M-TiO 2 and M-V-doped TiO 2 using the Fullprof program in the WinPlotr package. The prepared materials were refined in the crystal system and space group of anatase (tetragonal, I4 1 /amd (141)). The vanadium ion was successfully doped into TiO 2 . The isotherm type of M-TiO 2 and 2.3 wt% V doped TiO 2 were of type IV, with a profile of type H2 hysteresis loops, while the 3.3 and 4.9 wt% vanadium-doped TiO 2 reflected isotherm type III. The Brunauer-Emmett-Teller (BET) results showed a significant reduction in surface area due to increased concentrations of vanadium. The highest values of BET-specific surface area, pore volume and average pore size of M-TiO 2 were 46 m 2 /g, 18.45 nm and 0.2572 cm 3 /g respectively.

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Electrospun nanofibers of V-doped TiO2 with high photocatalytic activity

Cited by 127 publications

References 35 publications

Enhanced photocatalytic properties of reusable TiO 2 -loaded natural porous minerals in dye wastewater purification

Enhanced photocatalytic properties of reusable TiO 2 -loaded natural porous minerals in dye wastewater purification

Synthesis of Vanadium (III) Doped Anatase TiO2 by Solid State Reaction Method

Effect of V Dopant on Physicochemical Properties of Vanadium-Doped Anatase Synthesized via Simple Reflux Technique

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