Photoelectrochemical properties of TiO2/SrTiO3 combined nanotube arrays

Guo, Limin; Wang, Xiaohui; Zhang, Hui; Li, Longtu

doi:10.1016/j.ceramint.2012.10.151

Cited by 15 publications

(3 citation statements)

References 12 publications

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“…The S500 and S600 samples showed the phenomenon of constant positive photocurrents (−0.75 to 0.8 V. SCE ) rather than ambipolar photocurrents . This is due to the generation of high amounts of Ti 3+ ions in the S700 and S800 samples at elevated temperatures, altering the electrochemical activity of the film surfaces and allowing the conducting electrons to cross the potential barrier at the semiconductor/electrolyte interface and enter the electrolyte to undergo reduction reactions. ,− Under 365 nm light irradiation with a light intensity of 1800 μW·cm –2 , the LSV curves of all samples in NaOH solution were similar to those under 254 nm light irradiation. The 365 nm light, not achieving the escape work of metal Ti, excites only the photoelectrons from the valence to the conduction band (CB) of TiO 2 , resulting in no photocurrent generation in untreated metal Ti.…”

Section: Results and Discussionmentioning

confidence: 99%

Modulation of Bipolar Ultraviolet Current in TiO₂ Nanofilms for Switching Logic Devices via Ti Valence State Control

Lai,

Jin,

et al. 2023

ACS Appl. Nano Mater.

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Section: Results and Discussionmentioning

confidence: 99%

Modulation of Bipolar Ultraviolet Current in TiO₂ Nanofilms for Switching Logic Devices via Ti Valence State Control

Lai,

Jin,

et al. 2023

ACS Appl. Nano Mater.

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“…There are several reasonable explanations for this observation. In general, the titanium is attacked by hot hydrochloric acid and consequently, the thin titanium film cannot resist the chemical environment during the hydrothermal growth process and dissolves [27]. However, partly oxidized titanium continues oxidizing in the hot aqueous solution and becomes chemically more stable.…”

Section: Structures Obtained Via Laser-induced Oxidation Of Titaniummentioning

confidence: 99%

Position-controlled laser-induced creation of rutile TiO₂ nanostructures

et al. 2019

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For potential applications of nanostructures, control over their position is important. In this report, we introduce two continuous wave laser-based lithography techniques which allow texturing thin TiO2 films to create a fine rutile TiO2 structure on silicon via spatially confined oxidation or a solid–liquid–solid phase transition, for initial layers, we use titanium and anatase TiO2, respectively. A frequency-doubled Nd:YAG laser at a wavelength of 532 nm is employed for the lithography process and the samples are characterized with scanning electron microscopy. The local orientation of the created rutile crystals is determined by the spatial orientation of hydrothermally grown rutile TiO2 nanorods. Depending on the technique, we obtain either randomly aligned or highly ordered nanorod ensembles. An additional chemically inert SiO2 cover layer suppresses the chemical and electronic surface properties of TiO2 and is removed locally with the laser treatment. Hence, the resulting texture provides a specific topography and crystal structure as well as a high contrast of surface properties on a nanoscale, including the position-controlled growth of TiO2 nanorods.

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“…In this experiment, TiO 2 nanotube arrays were grown on titanium substrate by anodic oxidization. After the titanium oxide nanotube arrays were obtained, the samples were reduced by aluminothermic reduction in the N 2 atmosphere [13][14][15][16][17]. Crystal structure, solar energy collection and photoelectric properties of the samples were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic and eletrocatalytic activity of black TiO ₂ nanotube arrays by aluminothermic reduction

Jiang

Liu

et al. 2022

Micro & Nano Letters

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The black TiO2 nanotubes arrays were prepared by anodizing and aluminothermic reduction process. The prepared samples were characterized by X‐ray diffraction (XRD), SEM, UV‐visible absorption spectroscopy and X‐ray photoelectron spectroscopy (XPS). The photochemical/electrical catalytic activity of the samples before and after blackening treatment was tested. Comparing with the raw TiO2, the macrostructure of the black TiO2 nanotube arrays changes a little, and the tubal walls become a little thicker and rough. The photocatalytic hydrogen production rate has an obvious enhancement (from 8.9 µmol cm−2 h−1 to 22.8 µmol cm−2 h−1) after the blackening treatment and the electrocatalytic H2 evolution rate is also improved with a lower onset potential. The increment of trivalent Ti3+ on the surface is confirmed by XPS and presented by the colour changing of the samples (from white colour to black). The hybrid energy band gap and reduced charge transfer barrier are proved to be essential in promoting the catalytic properties of the black TiO2 nanotube arrays.

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Photoelectrochemical properties of TiO2/SrTiO3 combined nanotube arrays

Cited by 15 publications

References 12 publications

Modulation of Bipolar Ultraviolet Current in TiO₂ Nanofilms for Switching Logic Devices via Ti Valence State Control

Modulation of Bipolar Ultraviolet Current in TiO₂ Nanofilms for Switching Logic Devices via Ti Valence State Control

Position-controlled laser-induced creation of rutile TiO₂ nanostructures

Photocatalytic and eletrocatalytic activity of black TiO ₂ nanotube arrays by aluminothermic reduction

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Photoelectrochemical properties of TiO2/SrTiO3 combined nanotube arrays

Cited by 15 publications

References 12 publications

Modulation of Bipolar Ultraviolet Current in TiO2 Nanofilms for Switching Logic Devices via Ti Valence State Control

Modulation of Bipolar Ultraviolet Current in TiO2 Nanofilms for Switching Logic Devices via Ti Valence State Control

Position-controlled laser-induced creation of rutile TiO2 nanostructures

Photocatalytic and eletrocatalytic activity of black TiO 2 nanotube arrays by aluminothermic reduction

Contact Info

Product

Resources

About

Modulation of Bipolar Ultraviolet Current in TiO₂ Nanofilms for Switching Logic Devices via Ti Valence State Control

Modulation of Bipolar Ultraviolet Current in TiO₂ Nanofilms for Switching Logic Devices via Ti Valence State Control

Position-controlled laser-induced creation of rutile TiO₂ nanostructures

Photocatalytic and eletrocatalytic activity of black TiO ₂ nanotube arrays by aluminothermic reduction