Novel approach for the synthesis of nitrogen-doped titania with variable phase composition and enhanced production of hydrogen under solar irradiation

Schematic transfer of photogenerated electrons: the conduction band of brookite to the conduction band of anatase (left) and the conduction band of anatase to the conduction band of rutile (right). [Display omitted] In order to maximize the photocatalytic production of hydrogen, it is desirable to d...

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Bibliographic Details
Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2017, 53(0), , pp.253-260
Main Authors: Reddy, Police Anil Kumar, Reddy, P. Venkata Laxma, Kim, Ki-Hyun, Kumar, Mandari Kotesh, Manvitha, Chennaiahgari, Shim, Jae-Jin
Format: Article
Language:English
Subjects:
Hydrogen production
Multiphase TiO2
Nitrogen doping
Photocatalysis
Water splitting
화학공학
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Summary:Schematic transfer of photogenerated electrons: the conduction band of brookite to the conduction band of anatase (left) and the conduction band of anatase to the conduction band of rutile (right). [Display omitted] In order to maximize the photocatalytic production of hydrogen, it is desirable to develop an efficient photocatalyst with enhanced yield and visible sensitivity. To this end, we developed a novel method to synthesize nitrogen doped TiO2 with anatase/rutile/brookite mixed phases in aqueous urea solutions. The hydrogen production capacity of the nitrogen doped multiphase TiO2 (e.g., anatase (69%)/brookite (17%)/rutile (14%)), when assessed under solar light irradiation, was six times higher than that of commercial Degussa P25 and bare TiO2 catalysts. Such enhanced efficiency was ascribed to increased visible absorption along with effective electron–hole separation between the different crystalline phases.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2017.04.033