Modifying CsPbX 3 (X = Cl, Br, I) with a Zeolitic Imidazolate Framework through Mechanical Milling for Aqueous Photocatalytic H 2 Evolution

作者：Sitong Feng, Ning Shen, Linjie Wang, Jiafu Zhao, Jinfa Ou, Zihuan Wu, Shaojuan Luo, Zhan Lin, Kai Yan, Chuan‐De Wu, Yong Xu · 发表于：ACS Applied Energy Materials · 年份：2022 · DOI：10.1021/acsaem.2c00615 · 被引用次数：22 · 研究领域：Perovskite Materials and Applications、2D Materials and Applications、Advanced Photocatalysis Techniques

All-inorganic perovskite nanocrystals (CsPbX 3, X = Cl, Br, and I) have attracted increasing attention in various fields due to their unique optoelectronic properties. However, the vulnerable structure of CsPbX 3 in aqueous solutions severely limits its further application in diverse fields. Although many protocols have been developed, the synthesis of all-inorganic CsPbX 3 nanocrystals in a large-scale and environment-friendly manner remains a significant challenge. Here, we demonstrate a facile strategy for modifying CsPbX 3 with a zeolitic imidazolate framework (ZIF-8) through mechanical milling, which can be used for the large-scale synthesis of CsPbX 3 @ZIF-8 composites. More importantly, the as-prepared composites display superior stability, and the photoluminescence (PL) intensity remains ∼86.7% after 8 weeks. Detailed characterizations indicate that the synergy in the composites can significantly facilitate the separation of photoinduced electrons and holes, leading to an increase in the photocurrent intensity. For photocatalytic H 2 evolution under visible light, the optimal CsPbBr 3 @ZIF-8 composite exhibits a H 2 productivity of 19.63 μmol·g –1 H 2 after 2.5 h, thus proving to be a promising catalyst for photocatalytic H 2 evolution under visible light in aqueous solutions. This work may not only provide a facile strategy for the modification of CsPbX 3 nanocrystals but also promotes their practical applications in diverse fields.