Mesoporous (001)-TiO nanocrystals with tailored Ti and surface oxygen vacancies for boosting photocatalytic selective conversion of aromatic alcohols
Selective conversion of aromatic alcohols to value-added chemicals is becoming an emerging research hotspot in heterogeneous photocatalysis, but its critical challenge is how to construct highly efficient photocatalysts. Herein, mesoporous (001)-TiO 2 nanocrystals with tailored Ti 3+ and surface oxy...
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| Published in | Catalysis science & technology Vol. 11; no. 8; pp. 2939 - 2947 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Published |
26.04.2021
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| Online Access | Get full text |
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| Summary: | Selective conversion of aromatic alcohols to value-added chemicals is becoming an emerging research hotspot in heterogeneous photocatalysis, but its critical challenge is how to construct highly efficient photocatalysts. Herein, mesoporous (001)-TiO
2
nanocrystals with tailored Ti
3+
and surface oxygen vacancies have been fabricated by a facile hydrothermal route, showing remarkably boosted photoactivity for selective conversion of aromatic alcohols to carbonyl compounds in water medium under visible-light irradiation. Results attest that the remarkably boosted photoactivity was mainly correlated with the strong synergetic effect of exposed (001) facets, Ti
3+
self-doping, and surface oxygen vacancies, leading to the enhanced reactant (aromatic alcohols and O
2
) activation
via
the high surface energy of (001) facets, the improved visible-light absorbance
via
the intrinsic band gap narrowing, and the escalated photoelectron-hole separation efficiency
via
Ti
3+
and surface oxygen vacancies acting as electron sinks. Meanwhile, a plausible photocatalytic mechanism for selective conversion of aromatic alcohols to carbonyl compounds has been elucidated in detail based on active species identified by capture experiments. It is hoped that this work can deliver some new insights into the rational design of highly efficient photocatalysts applied in future green organic selective transformation reactions.
Mesoporous (001)-TiO
2
nanocrystals with tailored Ti
3+
and surface oxygen vacancies exhibited remarkably boosted photoactivity for selective conversion of aromatic alcohols to carbonyl compounds in water medium under visible-light irradiation. |
|---|---|
| Bibliography: | 2 adsorption-desorption isotherms of different photocatalysts, XPS surveys of different photocatalysts, recycling test of T3 for selective conversion of benzyl alcohol and 1-phenylethanol, and TEM image and XRD pattern of T3 for selective conversion of benzyl alcohol and 1-phenylethanol after the 9th recycling test. See DOI Electronic supplementary information (ESI) available: Photograph of the reaction system for photocatalytic selective conversion of aromatic alcohols, N 10.1039/d1cy00053e |
| ISSN: | 2044-4753 2044-4761 |
| DOI: | 10.1039/d1cy00053e |