Construction of a ternary WO3/CsPbBr3/ZIF-67 heterostructure for enhanced photocatalytic carbon dioxide reduction

Abstract

Using halide perovskite nanomaterials for solarto-fuel conversion has recently attracted a lot of attention due to their excellent photoelectric properties. However, severe photogenerated charge carrier recombinations and poor reaction kinetics greatly restrict their photocatalytic performance. In this study, a ternary WO 3 /CsPbBr 3 /ZIF-67 heterostructure was designed for efficient CO 2 photoreduction. The results indicate that the Z-scheme charge transfer pathway constructed between WO 3 and CsPbBr 3 ensures the effective transfer and separation of photogenerated charge carriers. Meanwhile, the subsequent surface modification of zeolitic imidazolate frameworks (ZIF-67) with active Co centers further benefits CO 2 adsorption and activation. Accordingly, the synergistic effects of charge separation and CO 2 uptake greatly promote the photocatalytic activity. The optimal WO 3 /CsPbBr 3 /ZIF-67 heterostructure yields a CO production of 99.38 μmol g −1 in 3 h, which is 6.8 times of that produced by CsPbBr 3 . This work will inspire new insights in developing efficient photocatalysts for CO 2 reduction and even more challenging photocatalytic reactions by elaborately regulating the functional ingredient.

Stabilization and Performance Enhancement Strategies for Halide Perovskite Photocatalysts

“…This HPP achieved a product yield rate of 52.73 µmol g −1 h −1 with 84.3% CH 4 selectivity, which was 12.2 times of that of the pure 2D CsPbBr 3 NSs. [181] In addition, numerous direct Z-scheme HPPs, such as FAPbBr 3 /α-Fe 2 O 3 , [182] 0D CsPbBr 3 /2D Bi 2 WO 6 , [183] CsPbBr 3 /g-C 3 N 4 , [184] WO 3 /CsPbBr 3 /ZIF-67, [185] CsPbBr 3 /WO 3 , [186] Cs 3 Bi 2 I 9 / Bi 2 WO 6 , [187] Cs 2 AgBiBr 6 /g-C 3 N 4 , [188] and MA 2 AgBiI 6 /SnS [189] have been reported for an efficient photocatalytic CO 2 reduction to CO and CH 4 , and all these HPPs outperformed their pristine perovskite counterparts.…”

Oxalate‐Assisted Synthesis of Hollow Carbon Nanocage With Fe Single Atoms for Electrochemical CO2 Reduction

“…[1] The CO 2 capture, utilization and storage (CCUS) is a critical technology to the solution of the above crisis. Compared with mineralization, [2][3] thermal catalysis, [4][5] enzymatic catalysis, [6] and photocatalysis, [7,8] DOI: 10.1002/smll.202302611 electrochemical CO 2 reduction reaction (CO 2 RR) has the advantages of mild reaction conditions, diverse product selectivity and good compatibility with clean energy. [9] However, the side reaction, hydrogen evolution reaction (HER), in aqueous solution competes with CO 2 RR.…”

Selectively constructing sandwich-like heterostructure of CdS/PbTiO3/TiO2 to improve visible-light photocatalytic H2 evolution

“…In this study, we upgraded the system by introducing a typical visiblelight-responsive photocatalyst CdS with a bandgap of 2.4 eV [23,24] to extend the light absorption capability of PbTiO 3 /TiO 2 . Controlling the spatial distribution of the components and their interfaces is necessary for the construction of efficient photocatalysts in heterostructures, particularly three-component ones [25][26][27][28][29][30][31]. Ren's group [32] and Liu's group [33] previously demonstrated the effectiveness of CdS in photocatalytic or piezophotocatalytic applications using single-crystal PbTiO 3 rods or nanoplates modified with CdS nanoparticles.…”