3D dahlia-like NiAl-LDH/CdS heterosystem coordinating with 2D/2D interface for efficient and selective conversion of CO2

Developing photocatalyst with high activity, superior stability and prominent selectivity for CO2 conversion is of great importance for the target of carbon neutralization. Herein, 3D dahlia-like NiAl-LDH/CdS heterosystem is developed through in-situ decoration of exfoliated CdS nanosheets on the scaffold of NiAl-LDH and the on-spot self-assembly. The formation of a hierarchical architecture collaborating with well-defined 2D/2D interfacial interaction is constructed by optimizing the ratio of CdS integrated in the formation of the heterojunction. The light-harvesting capacity of NiAl-LDH/CdS is improved by this unique scaffold, and the charge transfer between NiAl-LDH and CdS is effectively facilitated by virtue of the unique 2D/2D interface. As a result, the 3D hierarchical NiAl-LDH/CdS heterosystem presents 12.45 mu mol g(-1) h(-1) of CO production (3.3 and 1.6 folds of pristine NiAl-LDH and CdS) with 96% selectivity and superior stability. This 3D hierarchical design collaborating with 2D/2D interfacial interaction provides a new avenue to develop ideal catalysts for artificial photosynthesis. (c) 2021 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

Automated summary

The article introduces a new photocatalyst, which is constructed by decorating CdS nanosheets on the scaffold of NiAl-LDH. The catalyst exhibits high activity, superior stability, and prominent selectivity, with effective charge transfer between NiAl-LDH and CdS facilitated by the unique 2D/2D interface.