Preparation of Fe-doped TiO2 nanotube arrays and their photocatalytic activities under visible light

Tu, Ya-Fang; Sheng-you, Huang; Sang, Jizhang; Zou, Xian-Wu

doi:10.1016/j.materresbull.2009.08.020

Cited by 85 publications

(28 citation statements)

References 51 publications

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“…Based on this fact, much effort has been put forth to determine ways to utilize visible light in this photocatalytic system. The simplest successful approaches have been to modify the TiO 2 nanostructures itself to enhance its response to visible light via doping, depositing, loading of TiO 2 nanostructures and other methods [26][27][28][29][30][31][32][33][34][35][36][37]. A comparison of the photocatalytic activity of the present study with similar studies is presented in Table 4.…”

Section: Resultsmentioning

confidence: 95%

Synthesis and characterization of iron-doped titania nanohoneycomb and nanoporous semiconductors by electrochemical anodizing method as good visible light active photocatalysts

Momeni

Ghayeb

2015

J Mater Sci: Mater Electron

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Iron-doped TiO 2 nanostructures (FeTiO 2 NSs) were prepared by in situ electrochemical anodizing of titanium in a single-step process in the presence of 3, 9, 15 and 21 mM of potassium ferricyanide. For the first time, K 3 Fe(CN) 6 was used as the iron source in doping process. The resulting samples were characterized by FE-SEM, XRD and EDX. SEM images of the resulting samples showed that for a specific morphology, appropriate concentrations of potassium ferricyanide are necessary. Diffuse reflectance spectra showed a shift toward longer wavelengths relative to pure TiO 2 nanotube (TiO 2 NT). The dependence of photo-activity on iron doping on TiO 2 was studied for photodegradation of methylene blue (MB). After iron-doping, the removal rate of MB increased under visible light radiation. The results showed that FeTiO 2 NSs samples have excellent photocatalytic performance. The sample FeTiO 2 NSs2 exhibited better photocatalytic activity than the pure TiO 2 NTs and FeTiO 2 NSs samples fabricated using other iron concentrations. This work demonstrated a feasible and simple anodizing method to fabricate an effective, reproducible, and inexpensive visible-light-driven photocatalyst for environmental applications.

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Section: Resultsmentioning

confidence: 95%

Synthesis and characterization of iron-doped titania nanohoneycomb and nanoporous semiconductors by electrochemical anodizing method as good visible light active photocatalysts

Momeni

Ghayeb

2015

J Mater Sci: Mater Electron

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“…response of TiO 2 to the visible light range and increase their photoactivities [3][4][5]. In addition, sulfated modification can increase the number and strength of its surface acid sites, which promote the separation of photoinduced electron-hole pairs [6,7].…”

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confidence: 99%

Synergistic effects of sulfation and Fe-doping on the photocatalysis of titania

Yang

Tian

2010

Res Chem Intermed

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Fe-doped sulfated titania photocatalysts were prepared by one-step thermal hydrolysis of industrial titanyl sulfate and characterized using XRD, FT-IR, UV-Vis DRS, and N 2 adsorption-desorption techniques. The effects of the volume ratio of pre-adding water to TiOSO 4 on the structure of the titania photocatalysts were investigated. The photocatalytic activities of Fe-doped sulfated titania samples were evaluated using the photooxidation of methylene blue in aqueous solutions under UV light irradiation. The results indicate that Fe-doping induces the red shift of the absorption edge to the visible light range. Meanwhile, sulfur species in the form of sulfate are incorporated into the network of Ti-O-Ti and coordinated to titania in bidentate models, which can effectively promote the separation of the photogenerated electrons and holes. Synergistic effects of both are beneficial for improving the photocatalytic activity of the Fe-doped sulfated titania photocatalysts.Photocatalysis has received considerable attention over the past two decades because of its promising applications such as in renewable energies and environmental protections [1, 2]. As an important semiconductor photocatalytic material, titania has attracted a great deal of research interest due to its good chemical stability, insolubility in water, non-toxicity and cost-effectiveness. However, the relatively high intrinsic band gap of titania (3.2 eV for the anatase) restricts its utilization of solar energy. On the other hand, the photogenerated electrons and holes can easily recombine, which induces the low quantum efficiency. Studies indicate that iron-doping can effectively extend the spectral

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“…21,22 Second, the surface plasmon resonance of Fe particles is excited by visible light, facilitating the excitation of the surface electron and interfacial electron transfer. 23 The significantly enhanced photodegradation of MB in the Fe/TiO2-nanocarbon composites under visible light irradiation may be ascribed to the cooperative effect of Fe and nanocarbon dopants, as shown in Figs. 9 (b) and (c).…”

Section: Resultsmentioning

confidence: 93%

Relative Photonic Properties of Fe/TiO₂-Nanocarbon Catalysts for Degradation of MB Solution under Visible Light

Oh¹,

Zhang²,

Meng³

et al. 2010

Bulletin of the Korean Chemical Society

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Nanocarbon supported Fe/TiO2 composite catalysts were prepared using CNTs (carbon nanotubes) and C60 (fullerene) as nanocarbon sources by a modified sol-gel method. The Fe/TiO2-nanocarbon composites were characterized by the BET surface area, scanning electron microscope (SEM), Transmission Electron Microscope (TEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) and UV-vis spectra. In comparison with non-nanocarbon doped Fe/TiO2 composites, the nanocarbon supported Fe/TiO2 composites had higher absorption ability with a larger specific surface area, and showed higher photocatalytic activity during the degradation of methylene blue (MB) under visible light. The reasons for the obvious increase of photocatalytic activity indicated that the photoactivity not only benefits from nanocarbon introduced, but also relates to the cooperative effect of the Fe as a dopant.

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Preparation of Fe-doped TiO2 nanotube arrays and their photocatalytic activities under visible light

Cited by 85 publications

References 51 publications

Synthesis and characterization of iron-doped titania nanohoneycomb and nanoporous semiconductors by electrochemical anodizing method as good visible light active photocatalysts

Synthesis and characterization of iron-doped titania nanohoneycomb and nanoporous semiconductors by electrochemical anodizing method as good visible light active photocatalysts

Synergistic effects of sulfation and Fe-doping on the photocatalysis of titania

Relative Photonic Properties of Fe/TiO₂-Nanocarbon Catalysts for Degradation of MB Solution under Visible Light

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Preparation of Fe-doped TiO2 nanotube arrays and their photocatalytic activities under visible light

Cited by 85 publications

References 51 publications

Synthesis and characterization of iron-doped titania nanohoneycomb and nanoporous semiconductors by electrochemical anodizing method as good visible light active photocatalysts

Synthesis and characterization of iron-doped titania nanohoneycomb and nanoporous semiconductors by electrochemical anodizing method as good visible light active photocatalysts

Synergistic effects of sulfation and Fe-doping on the photocatalysis of titania

Relative Photonic Properties of Fe/TiO2-Nanocarbon Catalysts for Degradation of MB Solution under Visible Light

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Relative Photonic Properties of Fe/TiO₂-Nanocarbon Catalysts for Degradation of MB Solution under Visible Light