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Reverse Semi-Combustion Driven by Titanium Dioxide-Ionic Liquid Hybrid Photocatalyst.

ABSTRACT: Unprecedented metal-free photocatalytic CO₂ conversion to CO (up to 228±48??mol?g^-1?h^-1) was displayed by TiO₂@IL hybrid photocatalysts prepared by simple impregnation of commercially available P25-titanium dioxide with imidazolium-based ionic liquids (ILs). The high activity of TiO₂@IL hybrid photocatalysts was mainly associated to (i) TiO₂@IL red shift compared to the pure TiO₂ absorption, and thus a modification of the TiO₂ surface electronic structure; (ii) TiO₂ with IL bearing imidazolate anions lowered the CO₂ activation energy barrier. The reaction mechanism was postulated to occur via CO₂ photoreduction to formate species by the imidazole/imidazole radical redox pair, yielding CO and water.

SUBMITTER: Qadir MI

PROVIDER: S-EPMC7692890 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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Reverse Semi-Combustion Driven by Titanium Dioxide-Ionic Liquid Hybrid Photocatalyst.

Qadir Muhammad I MI Zanatta Marcileia M Pinto Jose J Vicente Isabel I Gual Aitor A Smith Emily F EF Neto Brenno A D BAD de Souza Paulo E N PEN Khan Sherdil S Dupont Jairton J Alves Fernandes Jesum J

ChemSusChem 20200907 20

Unprecedented metal-free photocatalytic CO2 conversion to CO (up to 228±48 μmol g-1 h-1) was displayed by TiO2@IL hybrid photocatalysts prepared by simple impregnation of commercially available P25-titanium dioxide with imidazolium-based ionic liquids (ILs). The high activity of TiO2@IL hybrid photocatalysts was mainly associated to (i) TiO2@IL red shift compared to the pure TiO2 absorption, and thus a modification of t ...[more]

PMID: 33448661

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