Details

Autor(en) / Beteiligte

• Lv, Xiaoyu
• Pan, Danrui
• Zheng, Song
• Zeeshan Shahid, Malik
• Jiang, Guocan
• Wang, Jin
• Li, Zhengquan

Titel

In-situ producing CsPbBr 3 nanocrystals on (001)-faceted TiO 2 nanosheets as S‑scheme heterostructure for bifunctional photocatalysis

Ist Teil von

• Journal of colloid and interface science, 2023-07

Ort / Verlag

United States

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Fabricating a cost-effective yet highly active photocatalyst to reduce CO to CO and oxidize benzyl alcohol to benzaldehyde simultaneously, is challenging. Herein, we construct an S-scheme 0D/2D CsPbBr /TiO heterostructure for bifunctional photocatalysis. An in-situ synthetic route is used, which enables the precise integration between CsPbBr nanocrystals and ultrathin TiO nanosheets exposed with (001) facets (termed as TiO -001), resulting in a tightly coupled heterointerface and desirable band offsets. The as-prepared CsPbBr /TiO -001heterojunctions exhibit boosted charge carrier kinetics, particularly, quick carrier separation/transfer and efficient utilization. Experimental results and theoretical calculations validate the S-scheme route in CsPbBr /TiO -001, which allows the enrichment of strongly conserved electrons-holes at conduction and valence bands of CsPbBr and TiO -001, respectively. Consequently, compared to its counterparts, an excellent bifunctional activity (with 24 h reusability) is realized over CsPbBr /TiO -001, where the production rate of CO and benzaldehyde reach up to 78.06 μmol g h and 1.77 mmol g h respectively, without employing any sacrificial agents. This work highlights the development of perovskite-based heterostructures and describes the efficient harnessing of redox potentials and charge carriers towards combined photocatalytic systems.