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Defect‐induced Ordered Mesoporous Titania Molecular Sieves: A Unique and Highly Efficient Hetero‐phase Photocatalys for Solar Hydrogen Generation by Sanjeev Gupta; Surya Kumar Vatti; Qinfen Gu; Dipti Wagh; Haresh Manyar; Parasuraman Selvam is a Materials Science article available to read on EtoBox.

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## Abstract The conversion of solar energy into fuel has gained significant interest, particularly in photocatalytic water splitting, and the materials that efficiently generate hydrogen from water or aqueous solution using solar irradiation are highly desired for the hydrogen economy. Photocatalysts made of N‐doped TiO~2~ are frequently utilized for breaking of water molecules in the process of generating hydrogen. To achieve this target, a unique defect‐induced nitrogen‐doped highly organized 2D‐hexagonal periodic mesoporous titania, TiO~2‐x~N~y~ with a well‐crystallized framework is synthesized in a reproducible way using structure‐directing agents, e. g., F108, F127, P123, and CTAB. The nitrogen is incorporated into these samples through a facile method involving the calcination of templated materials in an air. A systematic characterization of the resulting ordered mesoporous titania employing a battery of experimental techniques indicates the presence of considerable amounts of intrinsic defects, viz., trapped electrons in oxygen vacancy and/or Ti^3+^ centres via nitrogen‐doping in the titania matrix. These defects in turn promote the charge separation of photogenerated excit

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Author

Sanjeev Gupta; Surya Kumar Vatti; Qinfen Gu; Dipti Wagh; Haresh Manyar; Parasuraman Selvam

Publisher

Wiley

Published

2023

Field

Materials Science (Physical Sciences)