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Preparation of highly dispersed Ni single-atom doped ultrathin g-C3N4 nanosheets by metal vapor exfoliation for efficient photocatalytic CO2 reduction.
- Source :
-
Journal of Colloid & Interface Science . Apr2024, Vol. 660, p381-392. 12p. - Publication Year :
- 2024
-
Abstract
- [Display omitted] Single-atom photocatalysts can modulate the utilization of photons and facilitate the migration of photogenerated carriers. However, the preparation of single-atom uniformly doped photocatalysts is still a challenging topic. Herein, we propose the preparation of Ni single-atom doped g-C 3 N 4 photocatalysts by metal vapor exfoliation. The Ni vapor produced by calcining nickel foam at high temperature accumulates in between g-C 3 N 4 layers and poses a certain vapor pressure to destroy the interlayer van der Waals forces of g-C 3 N 4. Individual metal atoms are doped into the structure while exfoliating g-C 3 N 4 into nanosheets by metal vapor. Upon optimization of Ni content, the Ni single atom doped g-C 3 N 4 nanosheets with 2.81 wt% Ni exhibits the highest CO 2 reduction performance in the absence of sacrificial agents. The generation rates of CO and CH 4 are 19.85 and 1.73 μmol g−1h−1, respectively. The improved photocatalytic performance is attributed to the anchoring Ni of single atoms on g-C 3 N 4 nanosheets, which increases both carrier separation efficiency and reaction sites. This work provides insight into the design of photocatalysts with highly dispersed single-atom. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 660
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 175343010
- Full Text :
- https://doi.org/10.1016/j.jcis.2024.01.023