Reverse Semi?Combustion Driven by Titanium Dioxide?Ionic Liquid Hybrid Photocatalyst

Qadir, Muhammad I.; Zanatta, Marcileia; Pinto, Jose; Vicente, Isabel; Gual, Aitor; Smith, Emily; Neto, Brenno A. D.; de Souza, Paulo E. N.; Khan, Sherdil; Dupont, Jairton; Alves Fernandes, Jesum

Abstract

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 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.

Citation

Qadir, M. I., Zanatta, M., Pinto, J., Vicente, I., Gual, A., Smith, E., …Alves Fernandes, J. (2020). Reverse Semi‐Combustion Driven by Titanium Dioxide‐Ionic Liquid Hybrid Photocatalyst. ChemSusChem, 13(20), 5580-5585. https://doi.org/10.1002/cssc.202001717

• Journal Article Type: Article
• Acceptance Date: Aug 17, 2020
• Online Publication Date: Sep 7, 2020
• Publication Date: Oct 21, 2020
• Deposit Date: Aug 25, 2020
• Publicly Available Date: Sep 15, 2020
• Journal: ChemSusChem
• Print ISSN: 1864-5631
• Electronic ISSN: 1864-564X
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 13
• Issue: 20
• Pages: 5580-5585
• DOI: https://doi.org/10.1002/cssc.202001717
• Keywords: General Energy; General Materials Science; General Chemical Engineering; Environmental Chemistry
• Public URL: https://nottingham-repository.worktribe.com/output/4851102
• Publisher URL: https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/cssc.202001717