Effects of structure of anodic TiO2 nanotube arrays on photocatalytic activity for the degradation of 2,3-dichlorophenol in aqueous solution

Liang, Haichao; Li, Xiang-zhong

doi:10.1016/j.jhazmat.2008.06.033

Cited by 179 publications

(76 citation statements)

References 33 publications

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“…This is in line with several other investigations by various researchers 505,[681][682][683][684] . However, there are a number of investigations that either report a maximum in the photocatalytic activity for tube layer thicknesses around 3-7 μm, 151,681,684 or the absence of an influence of the tube length 685 . Some discrepancies exist also for the influence of tube diameter.…”

Section: Tio 2 Tube Length Diameter and Typementioning

confidence: 99%

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

2014

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Section: Tio 2 Tube Length Diameter and Typementioning

confidence: 99%

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

2014

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“…Among these nanostructures, the titanium dioxide nanotubalar materials are of high interest due to chemical inertness, strong oxidizing power, large surface area, non toxicity, high photocatalytic activitry, high cation exchange capacity, strong oxidizer, low cost of production and relatively good stability at elevated temperatures (Khan et al, 2006;Samarghandi et al, 2007;Liang and Li, 2009). This material extensively explored as a catalyst for water splitting and for the production of solar hydrogen (Chen et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Latter on TiO 2 based nanotubes (TNTs) of different geometrical shapes and microstructures have been developed through various approaches, for example the electrochemical anodic oxidation of Ti, assisted tempelate method and alkaline hydrothermal treatment (Wang et al, 2004;Khan et al, 2006;Mohapatra et al, 2007;Liang and Li 2009). There are advantages and limitations in each of above mentioned methods like attaining uniform inner diameter of titanium dioxide nanotubes and controlling the morphology, shape and length of the synthesized nanotubes (Wang et al, 2004;Liang and Li 2009).…”

Section: Introductionmentioning

confidence: 99%

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Iron and chromium doped titanium dioxide nanotubes for the degradation of environmental and industrial pollutants

Hussain

Siddiqa

2011

Int. J. Environ. Sci. Technol.

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Pure titanate nanotubes and titanate nanotubes doped with iron (III) and chromium (III) were fabricated by the hydrothermal treatment in methanol and sodium hydroxide mixture. The fabricated nano tubes have high surface area, high aspect ratio, consisted of very good surface morphology and high metals dispersion. The morphology, crysralline phase, composition were characterized by powdered X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Barrett-Joyner-Halenda methods and X-ray photoelectron spectroscopy. The results showed that nanotubes possess anatase phase and are composed up of 8-12 nm in diameter and 360-400 nm in length. The band gap of the titanium dioxide nanotubes was determined using transformed diffuse reflectance spectroscopy according to the Kubelka-Munk theory, showed pronounced band gap decrease on doped titanium dioxide nanotubes. The photocatalytic activity of doped nanotubes were evaluated in terms of degradation of phenol and photoreduction of carbon dioxide into methanol and ethanol under Ultra violet and Infra red irradiation. It was found that with iron (III) and chromium (III) doped titanium dioxide nanotubes exhibited much higher photocatalytic activity than undoped titanate nanotubes.

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“…One-dimensional TiO2 nanotube arrays (TNTs) due to their high aspect ratio and large surface to volume ratio, have displayed excellent charge-transfer and photochemical property in photocatalytical process [1][2][3][4][5][6]. However, only wavelength below 387 nm, about 5% of solar spectrum energy can be directly utilized due to its large band gap of 3.2 eV.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Response and Semiconductor Characters of Cu/Cu2O/CuO/TiO2 Nanotube Arrays Photocatalyst

Liang¹,

Xu²,

Li³

et al. 2017

Proceedings of the 2017 International Conference on Material Science, Energy and Environmental Engineering (MSEEE 2017)

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Abstract. The cocatalysts of various copper morphology modified TiO2 nanotube arrays (TNTs) were prepared by electrochemical deposition. The morphologies of the samples were investigated by SEM. The reductive and oxidative copper modification strongly reinforce TNTs photocurrent response in UV and visible light region, especially the later one shows higher catalytical activity in visible light from 610nm to 740nm. The reductive copper morphology consists of Cu and Cu2O, and oxidative one comprises Cu, Cu2O and CuO by photocurrent analysis. The flat band potentials calculated by Mott-Schottky curves move positive potential direction with the oxidation depth. IntroductionOne-dimensional TiO2 nanotube arrays (TNTs) due to their high aspect ratio and large surface to volume ratio, have displayed excellent charge-transfer and photochemical property in photocatalytical process [1][2][3][4][5][6]. However, only wavelength below 387 nm, about 5% of solar spectrum energy can be directly utilized due to its large band gap of 3.2 eV. TNTs modification by doping metals such as Au, Pt, Pd, Ag [7][8][9][10][11] or metal oxides such as ZnO, RuO2, WO3, has been a hot topic of research to improve the solar spectrum absorption efficiency while maintaining its excellent charge-transfer property. The metal ion or metal oxides enhances the photo-catalytic activity by reducing electron-hole pair recombination and/or reducing the band gap.Cu as a metal of relative abundance and low cost has attracted much attention due to enhancement of the photocatalytic activity [16][17][18][19][20][21][22][23]. It can prevent the recombination of photoexcited electrons and holes as co-catalysts and generate localized surface plasmon resonance(LSPR) effect which promotes the separation of electron-holes [17]. Momeni prepared highly ordered copper doped TiO2 nanotube arrays thin-film by in situ electrochemical method and the samples exhibited better photo-catalytic activity than the TNTs [19]. The energy band gaps (Eg) of its oxides Cu2O and CuO are narrower than TiO2, respectively 2.2 eV and 1.7eV, which can promote visible light absorption [20].Chen et al. have developed a novel core-shell heterostructured Cu/Cu2O nanowires as efficient visible light photocatalysts [21,22]. Multifunctional CuO nanowire/TiO2 nanotube arrays photoelectrode has been fabricated applying for photocatalysis [23]. However, very few studies on the photoelectrochemical performance of TNTs co-modification by elemental Cu and its oxides( CuO and Cu2O) have been reported.In this work, we prepared Cu/Cu2O/CuO/TNTs catalysts by electrochemical method successfully, and tested their photo electrochemical response in UV and visible light and semiconductor characters. Moreover, the mechanism of TNTs modification by Cu/Cu2O/CuO has been analyzed.

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Effects of structure of anodic TiO2 nanotube arrays on photocatalytic activity for the degradation of 2,3-dichlorophenol in aqueous solution

Cited by 179 publications

References 33 publications

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

Iron and chromium doped titanium dioxide nanotubes for the degradation of environmental and industrial pollutants

Photoelectrochemical Response and Semiconductor Characters of Cu/Cu2O/CuO/TiO2 Nanotube Arrays Photocatalyst

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