@article{Hou2026, 
author = {Junyang Hou and Ye Liu and Hengwei Qiu and Xiaojun Lv and Hao Zhang},
title = {Facet engineering of gradient-truncated CsPbBr3 perovskite nanocrystals: Controlled synthesis and selective photocatalytic CO2 reduction},
year = {2026},
journal = {Nano Research},
keywords = {perovskite nanocrystals, facet engineering, photocatalytic CO2 reduction, facet polarity, charge carrier dynamics},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94909159},
doi = {10.26599/NR.2026.94909159},
abstract = {Facet engineering has played a crucial role in influencing the fundamental properties of conventional semiconductor nanocrystals, including their surface structures and charge carrier dynamics. However, facet control in zero-dimensional colloidal CsPbBr3 perovskite nanocrystals (PNCs) remains much less explored, primarily owing to the absence of precise synthetic methodologies. Typically, PNCs are predominantly enclosed by {100} facets under thermodynamic control. This work reports the synthesis of gradient-truncated CsPbBr3 PNCs with exposed non-{100} facets, in which the truncation degree can be precisely modulated by introducing sulfide ions (S2−) as regulators. The added S2− ions bind to surface Pb2+ sites in PNCs and suppress the closure of high-energy non-{100} facets during the synthesis, thereby regulating the exposure of these facets. These gradient-truncated products exhibit enhanced CO selectivity for photocatalytic CO2 reduction, with the selectivity showing a positive correlation with truncation degree. The photocatalytic selectivity is attributed to the disparity in adsorption energies of reduction products on {110} facets and the enrichment of photogenerated electrons driven by facet polarity.}
}