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Formation of Hierarchical FeCoS 2 –CoS 2 Double‐Shelled Nanotubes with Enhanced Performance for Photocatalytic Reduction of CO 2
Author(s) -
Wang Yan,
Wang Sibo,
Zhang Song Lin,
Lou Xiong Wen David
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202004609
Subject(s) - photocatalysis , adsorption , redox , catalysis , heterojunction , materials science , chemical engineering , diffusion , visible spectrum , irradiation , nanotechnology , chemistry , photochemistry , inorganic chemistry , optoelectronics , organic chemistry , physics , nuclear physics , engineering , thermodynamics
Hierarchical FeCoS 2 –CoS 2 double‐shelled nanotubes have been rationally designed and constructed for efficient photocatalytic CO 2 reduction under visible light. The synthetic strategy, engaging the two‐step cation‐exchange reactions, precisely integrates two metal sulfides into a double‐shelled tubular heterostructure with both of the shells assembled from ultrathin two‐dimensional (2D) nanosheets. Benefiting from the distinctive structure and composition, the FeCoS 2 –CoS 2 hybrid can reduce bulk‐to‐surface diffusion length of photoexcited charge carriers to facilitate their separation. Furthermore, this hybrid structure can expose abundant active sites for enhancing CO 2 adsorption and surface‐dependent redox reactions, and harvest incident solar irradiation more efficiently by light scattering in the complex interior. As a result, these hierarchical FeCoS 2 –CoS 2 double‐shelled nanotubes exhibit superior activity and high stability for photosensitized deoxygenative CO 2 reduction, affording a high CO‐generating rate of 28.1 μmol h −1 (per 0.5 mg of catalyst).