Photoelectrochemical water splitting on chromium-doped titanium dioxide nanotube photoanodes prepared by single-step anodizing

Momeni, Mohamad Mohsen; Ghayeb, Yousef

doi:10.1016/j.jallcom.2015.02.137

Cited by 193 publications

(68 citation statements)

References 48 publications

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“…To address the limitations of bare TiO 2 , efforts were made to broaden the adsorption capability of the system towards the visible spectrum. The addition of sacrificial reagents or the modification of TiO 2 by metal deposition [11,12], anion doping [13,14], dye sensitization [15] or other semiconductors [16] have been investigated to extend the activity spectrum to the visible range and enhance light-assisted catalytic hydrogen production catalyzed by TiO 2 [10,17]. Recently, the integration of plasmonic nanoparticles (PNPs) as cocatalysts showed great potential for the design of more efficient photocatalysts [18].…”

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confidence: 99%

Water splitting catalyzed by titanium dioxide decorated with plasmonic nanoparticles

Gellé

Moores

2017

Pure and Applied Chemistry

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Abstract:The development of active, cheap, efficient and visible-light-driven water splitting catalysts is currently the center of intense research efforts. Amongst the most promising avenues, the design of titania and plasmonic nanoparticle hybrids is particularly appealing. Titania has been known for long to be an active photocatalyst, able to perform water splitting under light irradiation. However, this activity is limited to the ultraviolet spectrum and suffers from too rapid charge carrier recombination. The addition of plasmonic nanostructures enables to push absorption properties to the visible region and prevent unwanted charge recombination. In this review, we explain the principles behind the activity of such nanohybrids towards visible light water splitting and detail the recent research developments relying on plasmonic metals, namely Au, Ag and Cu.

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confidence: 99%

Water splitting catalyzed by titanium dioxide decorated with plasmonic nanoparticles

Gellé

Moores

2017

Pure and Applied Chemistry

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“…However, in the presence of light, the photocatalytic process is able to greatly enhance the degradation process via accelerating the reaction 21- 22 . Light absorption needs to have a certain amount of energy which is in relation to the wavelength of light, in which the light does not contain the required energy to transport electrons from valence band to conduction band [23][24] . Nanotubes show unique physical and chemical properties because they have free spaces in their interiors as well as an outer space that can be fi lled with active materials.…”

Section: -13mentioning

confidence: 99%

Fabrication of Titanium dioxide nanotube photo-electrodes in different electrolyte mixtures and the impacts on their characteristics and photo-catalytic abilities under visible light

Thabit

Liu

Zhang

et al. 2017

Polish Journal of Chemical Technology

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TiO 2 nanotube arrays were fabricated using electrochemical anodization of titanium foils, where different types of electrolytes were tested to determine conceptual choice for nanotubes fabrication. These electrolytes are 1M (NH 4 ) 2 SO 4 containing 0.5% wt NH 4 F, 1M Na 2 SO 4 containing 0.5% wt NH 4 F, 1M NaF containing 0.5% wt (NH 4 ) 2 SO 4 and a mixture of water: ethylene glycol 1:9 containing 0.5% wt NH 4 F. The foils were marked as EG type (Ethylene Glycol), AS type (Ammonium sulfate), SS type (sodium sulfate) and SF type (sodium fl uoride). The photocatalytic capabilities and characterization of the fabricated NTAs were analyzed using SEM, XRD, and DRS. The degradation ratio of designated organic pollutants (Rhodamine B) was analyzed. The obtained results have proven that foils fabricated using Ethylene glycol have signifi cant photocatalytic abilities, with a degradation ratio of EG-SS-SF-AS types being 80% to 85%, 70% to 80%, 70% to 75% and 52% to 55%, respectively.

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“…For this reason, many approaches have been made to improve the activity of TiO 2 that allows its efficient utilization under natural light source-sun. The vast majority of known strategies concerning material modification are based on metal [9][10][11][12] and non-metal doping [13][14][15][16], formation of organic-inorganic junctions [17], or surface sensitization by dye molecules [18]. To initiate the visible-light-driven activity of titania, doping with non-metal atoms (I, B, C, N, and S) has been considered as a one of the most effective approaches that results in stable material with improved photoactivity compared to the unmodified sample [19,20].…”

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confidence: 99%

Optimization of boron-doping process of titania nanotubes via electrochemical method toward enhanced photoactivity

Szkoda

Lisowska-Oleksiak

Siuzdak

2016

J Solid State Electrochem

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In this work, we were focused on the development of the electrochemical approach resulting in a stable boron doping of titania nanotubes. The doping procedure concerns anodic polarization of as-anodized titania in a H 3 BO 3 solution acting as n boron precursor. The series of attempts were taken in order to elaborate the most beneficial doping conditions. The parameters of electrochemical doping allowing to obtain boron-doped titania characterized by the highest photoconversion efficiency are as follows: reaction voltage 1.8 V, process duration 0.5 h, and the concentration of boric acid 0.5 M. Spectroscopy techniques such as UV-vis, X-ray diffraction, photoluminescence emission, and X-ray photoelectron spectroscopy were used to characterize the absorbance capability and the crystalline phase, to confirm the presence of boron atoms and to study the nature of chemical compounds, respectively. The well-ordered structure of titania and resistance of its morphology toward electrochemical treatment in H 3 BO 3 were confirmed by scanning electron microscopy images. However, cyclic voltammetry and electrochemical impedance spectroscopy studies showed the significant difference in conductivity and capacitance between doped and pristine titania. Moreover, the photocurrent densities of the B-doped sample were about seven times higher in comparison with those generated by the pure titania nanotube electrode.

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Photoelectrochemical water splitting on chromium-doped titanium dioxide nanotube photoanodes prepared by single-step anodizing

Cited by 193 publications

References 48 publications

Water splitting catalyzed by titanium dioxide decorated with plasmonic nanoparticles

Water splitting catalyzed by titanium dioxide decorated with plasmonic nanoparticles

Fabrication of Titanium dioxide nanotube photo-electrodes in different electrolyte mixtures and the impacts on their characteristics and photo-catalytic abilities under visible light

Optimization of boron-doping process of titania nanotubes via electrochemical method toward enhanced photoactivity

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