Encapsulated CdSe/CdS nanorods in double-shelled porous nanocomposites for efficient photocatalytic CO2 reduction

Colloidal quantum dots have been emerging as promising photocatalysts to convert CO 2 into fuels by using solar energy. However, the above photocatalysts usually suffer from low CO 2 adsorption capacity because of their nonporous structures, which principally reduces their catalytic efficiency. Here...

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Bibliographic Details
Published in:Nature communications 2022-10, Vol.13 (1), p.6466-6466, Article 6466
Main Authors: Li, Hui, Cheng, Caikun, Yang, Zhijie, Wei, Jingjing
Format: Article
Language:English
Subjects:
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Adsorption
Cadmium selenides
Cadmium sulfide
Carbon dioxide
Electronics industry
Electrons
Gas-solid interfaces
Humanities and Social Sciences
multidisciplinary
Nanocomposites
Nanorods
Organic semiconductors
Photocatalysis
Photocatalysts
Polycondensation reactions
Quantum dots
Reduction
Science
Science (multidisciplinary)
Self-assembly
Solar energy
Superstructures
Synchronism
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Summary:Colloidal quantum dots have been emerging as promising photocatalysts to convert CO 2 into fuels by using solar energy. However, the above photocatalysts usually suffer from low CO 2 adsorption capacity because of their nonporous structures, which principally reduces their catalytic efficiency. Here, we show that synchronizing imine polycondensation reaction to self-assembly of colloidal CdSe/CdS nanorods can produce micro-meso hierarchically porous nanocomposites with double-shelled nanocomposites. Owing to their hierarchical pores and the ability to separate photoexcited electrons, the self-assembled porous nanocomposites exhibit remarkably higher activity (≈ 64.6 μmol g −1 h −1 ) toward CO 2 to CO in solid-gas regime than that of nonporous solids from self-assembled CdSe/CdS nanorods under identical conditions. Importantly, the length of the nanorods is demonstrated to be crucial to correlate their ability to long-distance separation of photogenerated electrons and holes along their axial direction. Overall, this approach provides a rational strategy to optimize the CO 2 adsorption and conversion by integrating the inorganic and organic semiconductors. The authors design double shelled hollow superstructures from self-assembled CdSe/CdS nanorods in covalent organic frameworks for CO2 photo-reduction at a gas/solid interface.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-022-34263-z