Details

Autor(en) / Beteiligte

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

Titel

In-situ producing CsPbBr3 nanocrystals on (001)-faceted TiO2 nanosheets as S‑scheme heterostructure for bifunctional photocatalysis

Ist Teil von

• Journal of colloid and interface science, 2023-12, Vol.652, p.673-679

Ort / Verlag

Elsevier Inc

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •CsPbBr3/TiO2-001S-scheme heterostructure is constructed via in-situ synthesis.•Rich-heterointerface facilitate the boosted carrier kinetics in CsPbBr3/TiO2-001.•S-scheme routes conserve the strongest redox potentials in CsPbBr3/TiO2-001.•High bifunctional activity is realized for CO2 reduction and benzyl alcohol oxidation.•A 24 h reusability and structural stability is achieved. Fabricating a cost-effective yet highly active photocatalyst to reduce CO2 to CO and oxidize benzyl alcohol to benzaldehyde simultaneously, is challenging. Herein, we construct an S-scheme 0D/2D CsPbBr3/TiO2 heterostructure for bifunctional photocatalysis. An in-situ synthetic route is used, which enables the precise integration between CsPbBr3 nanocrystals and ultrathin TiO2 nanosheets exposed with (001) facets (termed as TiO2-001), resulting in a tightly coupled heterointerface and desirable band offsets. The as-prepared CsPbBr3/TiO2-001heterojunctions exhibit boosted charge carrier kinetics, particularly, quick carrier separation/transfer and efficient utilization. Experimental results and theoretical calculations validate the S-scheme route in CsPbBr3/TiO2-001, which allows the enrichment of strongly conserved electrons-holes at conduction and valence bands of CsPbBr3 and TiO2-001, respectively. Consequently, compared to its counterparts, an excellent bifunctional activity (with 24 h reusability) is realized over CsPbBr3/TiO2-001, where the production rate of CO and benzaldehyde reach up to 78.06 μmol g-1h−1 and 1.77 mmol g-1h−1 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.