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. |
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| 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] |
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| Database: | Engineering Source |
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