Effect of band structure on the photocatalytic performance of CsPbBr3/UiO-66 composites

Photocatalytic technology driven by sunlight is rapidly developing in response to energy shortage and environmental pollution. ABX₃ perovskite materials have gained widespread attention in photocatalysis due to their narrow band gap, high quantum efficiency, and high carrier mobility. The energy band structure plays a critical role in carrier generation, separation and redox processes in photocatalytic reactions. In this paper, we modulated the energy band structures of CsPbBr₃ and UiO-66 by changing the reaction parameters, and prepared CsPbBr₃/UiO-66 composites with different energy band structures to investigate photocatalytic activities. Our results showed that the degradation rate of (Methyl Orange) MO by CsPbBr₃/UiO-66 was significantly enhanced. The change in the CsPbBr₃ energy band structure did not significantly affect the photocatalytic activity of the composites. This work provides a new opportunity to improve the photocatalytic performance of perovskite-based composites using the energy band structure regulation strategy. Our findings may contribute to the design and development of highly efficient and stable perovskite-based photocatalysts for environmental remediation and energy conversion.