The surface chemistry of colloidal cesium lead bromide (CsPbBr3) nanocrystals is decisive in determine the stability and the final morphology of this class of material, characterized by ionic structure and a high defect tolerance factor. Here, the high sensitivity of purified colloidal nanocubes of CsPbBr3 to diverse environmental condition (solvent dilution, ageing, ligands post synthetic treatment) in ambient atmosphere is proved thanks to a comprehensive morphological (electron microscopy), structural ( /2 XRD and GIWAXS) and spectroscopic investigation. In particular, we establish the ability of aliphatic carboxylic acids and alkyl amines ligands to induce, even in a post preparative process at room temperature, structural, morphological and spectroscopic variations.Upon addition of oleyl amine the highly green emitting CsPbBr3 nanocubes effectively turn into 1D thin tetragonal nanowires or lead halide deficient rhombohedral 0D Cs4PBBr6 structures with a completely loss of fluorescence. On the other hand, addition of oleic acid induces the transformation of nanocubes into still emitting orthorombic 2D nanoplates, with tunable thickness/lateral size,

Heterojunctions based on metal halide perovskites (MHPs) are promising systems for the photocatalytic hydrogen evolution reaction (HER). In this work, we coupled Cs3Bi2Br9 nanocrystals (NCs), obtained by wet ball milling synthesis, with g-C3N4 nanosheets (NSs), produced by thermal oxidation of bulk g-C3N4, in air. These methods are reproducible, inexpensive and easy to scale up. Heterojunctions with different loadings of Cs3Bi2Br9 NCs were fully characterised and tested for the HER. A relevant improvement of H2 production with respect to pristine carbon nitride was achieved at low NCs levels reaching values up to about 4600 µmol g−1 h−1. This work aims to provide insights into the synthesis of inexpensive and high-performing heterojunctions using MHP for photocatalytic applications.

Cu2-xS nanocrystals (NCs) are recently exploited in several fields ranging from energy conversion to biomedical applications, due to their intriguing geometry and phase dependent semiconductor and near-infrared plasmonic properties. Even...

Heterojunctions based on metal halide perovskites (MHPs) are promising systems for photocatalytic hydrogen evolution reaction (HER). In this work, we coupled Cs3Bi2Br9 nanocrystals (NCs), obtained by wet ball milling synthesis, with g-C3N4 nanosheets (NSs) produced by thermal oxidation of bulk g-C3N4 in air. These methods are reproducible, inexpensive, and easy to scale up. Heterojunctions with different loadings of Cs3Bi2Br9 NCs were fully characterized and tested for HER. A relevant improvement of H2 production with respect to pristine carbon nitride was achieved at low NCs levels reaching values up to about 4600 µmol g-1 h-1. This work aims to provide insights on the synthesis of inexpensive and high performing heterojunctions using MHP for photocatalytic applications.