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Photoelectrochemical and photocatalytic activity of TiO2-WO3 heterostructures boosted by mutual interaction.

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Title: Photoelectrochemical and photocatalytic activity of TiO2-WO3 heterostructures boosted by mutual interaction.
Authors: Prabhu, S.1, Cindrella, L.1 cind@nitt.edu, Kwon, Oh Joong2, Mohanraju, K.2
Source: Materials Science in Semiconductor Processing. Dec2018, Vol. 88, p10-19. 10p.
Subjects: Titanium catalyst activity, Tungsten trioxide, Heterostructures, Calcination (Heat treatment), X-ray diffraction, Raman spectroscopy
Abstract: Abstract The TiO 2 -WO 3 heterostructures with superior interfacial interactions were synthesized by simple solvothermal method followed by calcination. The electrical property of the heterostructures was tuned by varying the amount of TiO 2 and WO 3 to achieve higher photoelectrochemical activity. The prepared samples were characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, scanning transmission electron microscopy and UV–vis diffuse reflectance spectroscopy. The strong interaction in the interface of TiO 2 -WO 3 heterostructures and the solar spectral response of TiO 2 and WO 3 reduce the electron-hole pair recombination rate and enhance the photoelectrochemical activity. The TiO 2 -WO 3 heterostructures show 17 times higher photon-to-hydrogen conversion efficiency than pure TiO 2 and WO 3 under solar light and almost complete removal of organic pollutant in 60 min under visible light. The TiO 2 -WO 3 heterostructures also show good adsorption capacity for organic pollutants. The present study demonstrates that the prepared TiO 2 -WO 3 heterostructures are promising materials for efficient water splitting as well as adsorption and photocatalytic removal of organic pollutants. Graphical abstract fx1 Highlights • TiO 2 -WO 3 heterostructures with superior interfacial interactions were synthesized. • Enhanced photocatalytic activity of TiO 2 -WO 3 heterostructures was demonstrated. • Electrical properties were tuned by varying the amount of TiO 2 and WO 3. [ABSTRACT FROM AUTHOR]
Copyright of Materials Science in Semiconductor Processing is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 131592328
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Photoelectrochemical and photocatalytic activity of TiO2-WO3 heterostructures boosted by mutual interaction.
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  Data: <searchLink fieldCode="AR" term="%22Prabhu%2C+S%2E%22">Prabhu, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cindrella%2C+L%2E%22">Cindrella, L.</searchLink><relatesTo>1</relatesTo><i> cind@nitt.edu</i><br /><searchLink fieldCode="AR" term="%22Kwon%2C+Oh+Joong%22">Kwon, Oh Joong</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Mohanraju%2C+K%2E%22">Mohanraju, K.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Materials+Science+in+Semiconductor+Processing%22">Materials Science in Semiconductor Processing</searchLink>. Dec2018, Vol. 88, p10-19. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Titanium+catalyst+activity%22">Titanium catalyst activity</searchLink><br /><searchLink fieldCode="DE" term="%22Tungsten+trioxide%22">Tungsten trioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Heterostructures%22">Heterostructures</searchLink><br /><searchLink fieldCode="DE" term="%22Calcination+%28Heat+treatment%29%22">Calcination (Heat treatment)</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Raman+spectroscopy%22">Raman spectroscopy</searchLink>
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  Label: Abstract
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  Data: Abstract The TiO 2 -WO 3 heterostructures with superior interfacial interactions were synthesized by simple solvothermal method followed by calcination. The electrical property of the heterostructures was tuned by varying the amount of TiO 2 and WO 3 to achieve higher photoelectrochemical activity. The prepared samples were characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, scanning transmission electron microscopy and UV–vis diffuse reflectance spectroscopy. The strong interaction in the interface of TiO 2 -WO 3 heterostructures and the solar spectral response of TiO 2 and WO 3 reduce the electron-hole pair recombination rate and enhance the photoelectrochemical activity. The TiO 2 -WO 3 heterostructures show 17 times higher photon-to-hydrogen conversion efficiency than pure TiO 2 and WO 3 under solar light and almost complete removal of organic pollutant in 60 min under visible light. The TiO 2 -WO 3 heterostructures also show good adsorption capacity for organic pollutants. The present study demonstrates that the prepared TiO 2 -WO 3 heterostructures are promising materials for efficient water splitting as well as adsorption and photocatalytic removal of organic pollutants. Graphical abstract fx1 Highlights • TiO 2 -WO 3 heterostructures with superior interfacial interactions were synthesized. • Enhanced photocatalytic activity of TiO 2 -WO 3 heterostructures was demonstrated. • Electrical properties were tuned by varying the amount of TiO 2 and WO 3. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Materials Science in Semiconductor Processing is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.mssp.2018.07.028
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      – TitleFull: Photoelectrochemical and photocatalytic activity of TiO2-WO3 heterostructures boosted by mutual interaction.
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              Text: Dec2018
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              Y: 2018
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