Iron-doped TiO2 nanotubes with high photocatalytic activity under visible light synthesized by an ultrasonic-assisted sol-hydrothermal method

Wei, Xiuzhen; Wang, Huijuan; Zhu, Guangfeng; Chen, Jin‐Yuan; Zhu, Liping

doi:10.1016/j.ceramint.2012.10.251

Cited by 30 publications

(12 citation statements)

References 46 publications

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“…3, correspond to anatase phase and Ti, respectively. The diffraction peaks located at 2θ = 25.31˚, 37.03˚, 37.93˚, 38.39˚, 47.95˚, 54.00˚, 55.00˚, and 62.94˚were correspondingly attributed to (101), (103), (004), (112), (200), (105), (211), and (204) planes of anatase TiO 2 , respectively [17,18]. Fe diffraction peaks are not found in the XRD patterns.…”

Section: Resultsmentioning

confidence: 98%

“…The reaction rate constant of UV-C irradiation was about 6.8 times faster than that of UV-A irradiation. This may be ascribed to the more effective separation of the photo-generated electron-hole pairs, thus inhibiting the recombination of the photoinduced electrons and holes and leading to an increase in the concentration of the photo-generated charge carrier [17]. Fig.…”

Section: Spectral Characterization Of Pure Tio 2 Nanotube and Fe-dopementioning

confidence: 98%

“…Doping TiO 2 with Fe 3+ is an effective approach to reduce electron-hole recombination rate and increase photocatalytic efficiency in terms of its semi-full electronic configuration and ion radius close to Ti 4+ . Many efforts have focused on the preparation and photocatalytic behavior of Fe 3+ -doped TiO 2 nanoparticle powders or films [16], but few reports have so far been found regarding Fe 3+ -doped TiO 2 nanotube [17,18]. These studies reported the improvement of photocatalytic activity under both visible light and UV light irradiation.…”

Section: Introductionmentioning

confidence: 97%

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Fabrication, characterization and photocatalytic performance of Fe-doped TiO2 nanotube composite for efficient degradation of water pollutants

Kim

2016

Desalination and Water Treatment

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A B S T R A C TPure TiO 2 nanotube and Fe-doped TiO 2 nanotube composite were fabricated by the electrochemical anodic oxidation process and the impregnating-calcination method, respectively. The structural and spectral properties were characterized by scanning electron microscopy, energy dispersive X-ray spectrometer, X-ray diffraction, Fourier transform infrared spectroscopy, photoluminescence, and UV-vis spectrum. These results showed that Fe was effectively deposited on the surface of TiO 2 nanotube. It is demonstrated that the Fe-doped TiO 2 nanotube composite can inhibit the recombination of electron-hole pairs and enhance the light harvesting ability. The photocatalytic activity of Fe-doped TiO 2 nanotube composite under UV irradiation was examined in terms of color and UV-vis absorbance for the degradation of methyl orange. The photocatalytic performance of UV-C irradiation in presence of Fe-doped TiO 2 nanotube composite increased obviously for the removal efficiency of color and UV-vis absorbance compared to that of UV-A irradiation, and the reaction rate constant was about 6.8 times faster than that of UV-A irradiation. This can be ascribed to the effective separation of the photo-generated charge carriers.

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Section: Resultsmentioning

confidence: 98%

Section: Spectral Characterization Of Pure Tio 2 Nanotube and Fe-dopementioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

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Fabrication, characterization and photocatalytic performance of Fe-doped TiO2 nanotube composite for efficient degradation of water pollutants

Kim

2016

Desalination and Water Treatment

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“…Typically, sol-gel-derived precipitates are amorphous in nature, requiring further heat treatment to induce crystallization. Based on literatures, the sol-gel method has been modified using various techniques like calcination, ultrasonic [23], hydrothermal [24,25], or surfactant [26] to obtain better properties of the synthesized powders.…”

Section: Sol-gel Synthesis Of Tio 2 Nanoparticlesmentioning

confidence: 99%

Advancement of Sol-Gel–Prepared TiO2 Photocatalyst

Bashiri¹,

Mohamed²,

Kait³

2017

Recent Applications in Sol-Gel Synthesis

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This chapter elaborates a review of sol-gel-prepared TiO 2 photocatalyst for different photocatalytic applications. Among the semiconductors employed, TiO 2 is known as an attractive photocatalyst owing to its high photosensitivity, nontoxicity, easy availability, strong oxidizing power and long-term stability. Some research works related to the effect of solgel preparation parameters on physicochemical properties and different photocatalytic applications of prepared TiO 2 photocatalysts are reported. Furthermore, various sol-gel and related systems for modification of TiO 2 photocatalytic performance, including transition metals and co-doing of TiO 2 , were considered. The results illustrated that doping TiO 2 with metal ions through sol-gel method usually resulted in an improved efficiency of TiO 2 photocatalyst. This method has all the advantages over other preparation techniques in terms of purity, homogeneity, felicity and flexibility in introducing dopants in a large concentration, stoichiometry control, ease of processing and composition control.

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“…Even the ultrasound-and microwave-assisted hydrothermal techniques require a thermal treatment for obtaining the nanotubes of anatase-TiO 2 [21,22]. Studies have shown that highly crystalline anatase-TiO 2 nanoparticles can be obtained via the modification of sol-gel precursor with an acid [23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of highly crystalline nanotubes/nanoplates of pure and silver-doped anatase-titania using acid-catalyst-modified sol–gel precursors

Jose

Kumari

Remya

et al. 2014

J Sol-Gel Sci Technol

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Highly crystalline nanotubes/nanoplates of pure and Ag-doped anatase-titania (TiO 2 ) having high aspect-ratio have been synthesized, without the involvement of thermal treatment, via the hydrothermal method using the acetic-acidmodified sol-gel processed nanocrystalline pure and Agdoped anatase-TiO 2 as precursors. The samples have been characterized for analyzing their morphology, structure, specific surface-area, and surface-chemistry using the transmission electron microscope, selected-area electron diffraction (SAED), X-ray diffraction, Brunauer-Emmett-Teller specific surface-area measurement, and Fourier transform infrared techniques. It has been observed that the hydrothermal treatment of acid-catyalyst-modified pure and Agdoped nanocrystalline anatase-TiO 2 precursors and the subsequent washing of hydrothermal products result in the formation of nanotubes/nanoplates of pure and Ag-doped anatase-TiO 2 instead of those of hydrogen titanate which is invariably obtained with the use of unmodified-precursors. It has been proposed that the formation of nanotubes/nanoplates of pure and Ag-doped anatase-TiO 2 via the hydrothermal method without the involvement of thermal treatment, under the given processing conditions, is due to the operation of double ion-exchange mechanism which is in contrast to that of conventional single ion-exchange mechanism responsible for the formation of nanotubes of hydrogen titanate. The operation of as-proposed double ion-exchange mechanism has been strongly supported by the experimentally observed variation in the solution-pH involved during the washing treatment of hydrothermal product.

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Iron-doped TiO2 nanotubes with high photocatalytic activity under visible light synthesized by an ultrasonic-assisted sol-hydrothermal method

Cited by 30 publications

References 46 publications

Fabrication, characterization and photocatalytic performance of Fe-doped TiO2 nanotube composite for efficient degradation of water pollutants

Fabrication, characterization and photocatalytic performance of Fe-doped TiO2 nanotube composite for efficient degradation of water pollutants

Advancement of Sol-Gel–Prepared TiO2 Photocatalyst

Hydrothermal synthesis of highly crystalline nanotubes/nanoplates of pure and silver-doped anatase-titania using acid-catalyst-modified sol–gel precursors

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