All-inorganic perovskite nanocrystals (CsPbX3, X = Cl, Br, and I) have attracted increasing attention in various fields due to their unique optoelectronic properties. However, the vulnerable structure of CsPbX3 in aqueous solutions severely limits its further application in diverse fields. Although many protocols have been developed, the synthesis of all-inorganic CsPbX3 nanocrystals in a large-scale and environment-friendly manner remains a significant challenge. Here, we demonstrate a facile strategy for modifying CsPbX3 with a zeolitic imidazolate framework (ZIF-8) through mechanical milling, which can be used for the large-scale synthesis of CsPbX3@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 H2 evolution under visible light, the optimal CsPbBr3@ZIF-8 composite exhibits a H2 productivity of 19.63 μmol·g–1 H2 after 2.5 h, thus proving to be a promising catalyst for photocatalytic H2 evolution under visible light in aqueous solutions. This work may not only provide a facile strategy for the modification of CsPbX3 nanocrystals but also promotes their practical applications in diverse fields.

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The electrochemical reduction of CO2 (CO2RR) has recently attract ed increasing attention for converting intermittent electric energy to chemical energy and reducing CO2 emission. Generally, various products including C1 and...

In this work, the synthesis and characterization ofgraphene-metal nanocomposite, a transparent conductive layer, is examined. This transparent conductive layer is named graphene-Ag-graphene (GAG), which makes full use of the high electron mobility and high conductivity characteristics of graphene, while electromagnetically induced transparency (EIT) is induced by Ag nanoparticles (NPs). The nanocomposite preparation technique delivers three key parts including the transfer of the first layer graphene, spin coating of Ag NPs and transfer of the second layer of graphene. The GAG transparent conductive nanocomposite layer possess a sheet resistance of 16.3 ohm/sq and electron mobility of 14,729 cm2/(v s), which are superior to single-layer graphene or other transparent conductive layers. Moreover, the significant enhancement of photoluminescence can be ascribed to the coupling of the light emitters in multiple quantum wells with the surface plasmon Ag NPs and the EIT effect.