Selectively anchoring Cu(OH)2 and CuO on amine-modified brookite TiO2 for enhanced CO2 photoreduction
Photocatalytic CO 2 reduction is a promising approach for reducing CO 2 emissions and achieving the goal of carbon neutrality. In this work, selectively coupling Cu(OH) 2 and CuO with amine-modified brookite TiO 2 (NH 2 –B–TiO 2 ) has been achieved by a simple precipitation method. The results show...
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Veröffentlicht in: | Carbon Letters 2023, 33(5), , pp.1395-1406 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Photocatalytic CO
2
reduction is a promising approach for reducing CO
2
emissions and achieving the goal of carbon neutrality. In this work, selectively coupling Cu(OH)
2
and CuO with amine-modified brookite TiO
2
(NH
2
–B–TiO
2
) has been achieved by a simple precipitation method. The results show that CuO is better than Cu(OH)
2
as a co-catalyst to enhance the CO
2
photoreduction capability of NH
2
–B–TiO
2
. The highest rates of CO
2
conversion to CH
4
and CO of NH
2
–B–TiO
2
–CuO composite reach 6.05 and 3.25 μmol h
−1
g
−1
, respectively, which is higher than 8 times the yield of CH
4
of NH
2
–B–TiO
2
. It is proposed that the NH
2
–B–TiO
2
–CuO composite offers an effective charge transfer through the formation of a p–n junction between NH
2
–B–TiO
2
and CuO interfaces, while in the NH
2
–B–TiO
2
–Cu(OH)
2
composite, the Cu(OH)
2
dominantly serves as an electron sink to capture photo-induced electrons, promoting photo-induced carrier separation. This work provides an ingenious synthetic method for selectively anchoring Cu(OH)
2
and CuO on semiconductors with different charge transfer routes for an efficient CO
2
photoreduction.
Graphical abstract |
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ISSN: | 1976-4251 2233-4998 |
DOI: | 10.1007/s42823-023-00497-0 |