1. Visible light-driven metal-oxide photocatalytic CO2 conversion.
- Author
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Khraisheh, Majeda, Khazndar, Aoubai, and Al‐Ghouti, Mohammad A.
- Subjects
VISIBLE spectra ,METALLIC oxides ,PHOTOCATALYSIS ,CARBON dioxide analysis ,PHOTOCATALYSTS ,SOLID state chemistry - Abstract
In this work, nine photocatalysts were prepared by a conventional solid-state reaction method. The samples were characterized by X-ray diffraction, UV-Vis diffuse reflectance spectroscopy, surface area measurements based on the Brunauer-Emmett-Teller theory, and scanning electron microscopy. The tested materials (BaBiO
3 , Bi2 WO6 , SrTiO3 , KNbO3 , NaNbO3 , Sr4 Nb2 O9 , YInO3 , CaIn2 O4 , and YFeO3 ) showed great potential for use as photocatalysts in the efficient reduction of CO2 into a renewable hydrocarbon fuel as well as in water splitting. Our results showed that among the nine tested photocatalysts, three could generate CH4 . In particular, it was observed that KNbO3 , as a result of its high surface area and the suitable band gap, showed the highest CH4 generation, (86.842 ppm g−1 h−1 ). Some of the tested photocatalysts could generate H2 and O2 at a very promising rate; Sr4 Nb2 O9 and NaNbO3 were the best two photocatalysts, with an average O2 production rate of 69.476 ppm g−1 h−1 and 57.928 ppm g−1 h−1 , respectively. Further, NaNbO3 showed the highest H2 production average with a rate of 220.128 ppm g−1 h−1 . The photocatalysts presented herein represent a significant improvement because of the reactor type and the preparation techniques implemented in this study. Copyright © 2015 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]- Published
- 2015
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