Optical and hydrophilic properties of nanostructure Cu loaded brookite TiO2 thin film

Eshaghi, Akbar; Eshaghi, Ameneh

doi:10.1016/j.tsf.2011.08.055

Cited by 10 publications

(9 citation statements)

References 22 publications

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“…Both Ti 2p signals are highly symmetric, and no shoulders are observed on the lower energy side of Ti 2p 3/2 signal. The binding energy splitting of Ti 2p is 5.65 eV, which agrees well with the result for Ti 4+ ions in TiO 2 [27]. The FWHM of the Ti 2p 3/2 signal for the brookite TiO sample with 7.0 wt.% Cu is slightly larger than that for the bare one, which is due to the existence of multiple Ti species and strong electronic interaction between Cu and Ti in the nanocomposites [42].…”

Section: Xps Analysissupporting

confidence: 85%

“…That's to say that interfacial charge-transfer excitation of electrons in the valence band of TiO 2 to copper ions can proceed, which inhibits electron-hole recombination [47]. Eshaghi et al [27] investigated the effect of Cu loading on the surface properties of brookite TiO 2 thin films and found that Cu ions behaved as electron acceptors under UV light irradiation, which improved the photoreactivity of titania by inhibiting electron-hole recombination. A similar result has also been obtained by Lo´pez et al [12] who reported Cu ions as electron captor inducing a low electron-hole recombination.…”

Section: Photocatalytic Performance Evaluationmentioning

confidence: 99%

“…Though it is more difficult to prepare bare brookite TiO 2 than other polymorphs, several methods have been developed to prepare bare brookite TiO 2 during the past ten years, and much more understanding related to the preparation and properties of brookite TiO 2 has been achieved [20][21][22][23][24][25]. Further research works show that brookite TiO 2 catalysts with enhanced photocatalytic activity can also be obtained by improving specific surface area [26] or doping with transition metals ions [27,28], noble metals [29,30] and lanthanides [31,32].…”

Section: Introductionmentioning

confidence: 99%

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Cu-doped TiO₂ brookite photocatalyst with enhanced visible light photocatalytic activity

Zou

Huang

et al. 2020

Materials Science-Poland

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Cu-doped TiO2 having a brookite phase and showing enhanced visible light photocatalytic activity was synthesized using a mild solvothermal method. The as-prepared samples were characterized by various techniques, such as X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy. Photocatalytic activity of Cu-doped brookite TiO2 nanoparticles was evaluated by photodegradation of methylene blue under visible light irradiation. The X-ray diffraction analysis showed that the crystallite size of Cu-doped brookite TiO2 samples decreased with the increase of Cu concentration in the samples. The UV-Vis diffuse reflectance spectroscopy analysis of the Cu-doped TiO2 samples showed a shift to lower energy levels in the band gap compared with that of bare phase brookite TiO2. Cu doped brookite TiO2 can obviously improve its visible light photocatalytic activity because of Cu ions acting as electron acceptors and inhibiting electron-hole recombination. The brookite TiO2 sample with 7.0 wt.% Cu showed the highest photocatalytic activity and the corresponding degradation rate of MB (10 mg/L) reached to 87 % after visible light illumination for 120 min, much higher than that of bare brookite TiO2 prepared under the same conditions (78 %).

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Section: Xps Analysissupporting

confidence: 85%

Section: Photocatalytic Performance Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cu-doped TiO₂ brookite photocatalyst with enhanced visible light photocatalytic activity

Zou

Huang

et al. 2020

Materials Science-Poland

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“…Eshaghi and Eshaghi [145] studied the effect of Cu loading on the surface properties of brookite thin films. The results indicated that the Cu-loaded brookite film was more hydrophilic than the undoped film both under irradiation and in the dark.…”

Section: Doped and Loaded Brookitementioning

confidence: 99%

Brookite, the Least Known TiO2 Photocatalyst

2013

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Abstract:Brookite is the least studied TiO 2 photocatalyst due to the difficulties usually encountered in order to obtain it as a pure phase. In this review, a comprehensive survey of the different methods available for preparing brookite powders and films is reported. Attention has been paid both to the most traditional methods, such as hydrothermal processes at high temperatures and pressures, and to environmentally benign syntheses using water soluble compounds and water as the solvent. Papers reporting the photocatalytic activity of pure and brookite-based samples have been reviewed.

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“…Metal doping acts as a stimulator of self-cleaning properties under visible-light irradiation. Doping of metal ions such as Cr, V, Fe, Pb, Cu has been explored [39][40][41], but it should be noted that improvement has not been observed in all cases. Non-metal doped TiO 2 (C-N-F doped TiO 2 ) thin films are also active under visible-light irradiation and can therefore act as self-cleaning surfaces [42][43][44].…”

Section: Self-cleaning Action Of Metal Oxide With Metal and Non-metalmentioning

confidence: 99%

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

Krishna

Madhurima

Purkayastha

2013

Eur. Phys. J. Appl. Phys.

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Abstract. Surfaces that exhibit reversible wettability toward water are extremely important for a variety of technological applications. In this context, the development of superhydrophobic and superhydrophilic surfaces for self-cleaning applications has been receiving a great deal of attention in the last few years. In this review, an overview of the current state-of-science and technology of self-cleaning surfaces is presented. The current understanding of physics of wetting leading to surfaces with predictive, controllable and reversible wettability is first presented. The review then focuses on materials, mainly metal oxides and their composites, employed for self-cleaning applications. It is shown that, although conventionally oxides and polymers are considered for self-cleaning applications, recent developments point toward the use of artificially engineered surfaces with hierarchical roughness. Applications of self-cleaning films in nonconventional areas such as protection of fabrics, solar cells and structures related to cultural heritage are discussed. The review ends with an outlook for the future in terms of science and technology of self-cleaning surfaces.

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Optical and hydrophilic properties of nanostructure Cu loaded brookite TiO2 thin film

Cited by 10 publications

References 22 publications

Cu-doped TiO₂ brookite photocatalyst with enhanced visible light photocatalytic activity

Cu-doped TiO₂ brookite photocatalyst with enhanced visible light photocatalytic activity

Brookite, the Least Known TiO2 Photocatalyst

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

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Optical and hydrophilic properties of nanostructure Cu loaded brookite TiO2 thin film

Cited by 10 publications

References 22 publications

Cu-doped TiO2 brookite photocatalyst with enhanced visible light photocatalytic activity

Cu-doped TiO2 brookite photocatalyst with enhanced visible light photocatalytic activity

Brookite, the Least Known TiO2 Photocatalyst

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

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Product

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Cu-doped TiO₂ brookite photocatalyst with enhanced visible light photocatalytic activity

Cu-doped TiO₂ brookite photocatalyst with enhanced visible light photocatalytic activity