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

• Published in: Science China materials 2022-06, Vol.65 (6), p.1550-1559
• Main Authors: Dong, Yu-Jie, Jiang, Yong, Liao, Jin-Feng, Chen, Hong-Yan, Kuang, Dai-Bin, Su, Cheng-Yong
• Format: Article
• Language: English
• Subjects: Carbon dioxide; Catalytic activity; Charge transfer; Chemistry and Materials Science; Chemistry/Food Science; Current carriers; Heterostructures; Materials Science; Metal-organic frameworks; Nanomaterials; Perovskites; Photocatalysis; Photoelectric effect; Photoelectricity; Reaction kinetics; Reduction; Separation; Synergistic effect; Zeolites
• ISSN: 2095-8226; 2199-4501
• DOI: 10.1007/s40843-021-1962-9

Using halide perovskite nanomaterials for solar-to-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 CsPbBr3. This work will inspire new insights in developing efficient photocatalysts for CO2 reduction and even more challenging photocatalytic reactions by elaborately regulating the functional ingredient.