Loading…
Dependence of the intrinsic phase structure of Bi 2 O 3 catalysts on photocatalytic CO 2 reduction
Rapid recombination of charge carriers and the low efficiency of surface catalysis limit the photocatalytic CO 2 reduction performance. Herein, models of Bi 2 O 3 with different phase structures were investigated to achieve in-depth understanding of the role that phase structure plays in the photoca...
Saved in:
| Published in: | Catalysis science & technology 2021-03, Vol.11 (6), p.2021-2025 |
|---|---|
| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Rapid recombination of charge carriers and the low efficiency of surface catalysis limit the photocatalytic CO
2
reduction performance. Herein, models of Bi
2
O
3
with different phase structures were investigated to achieve in-depth understanding of the role that phase structure plays in the photocatalytic CO
2
process. The gamma phase of Bi
2
O
3
(γ-Bi
2
O
3
) exhibited significantly enhanced charge separation ability compared with that of the alpha phase (α-Bi
2
O
3
) and beta phase (β-Bi
2
O
3
). Charge-carrier dynamics revealed that the decay lifetime was increased in γ-Bi
2
O
3
, indicating the enhanced charge carrier separation and migration ability in the γ phase of Bi
2
O
3
. As expected, the γ-Bi
2
O
3
photocatalyst exhibited a remarkably improved photocatalytic CO
2
reduction activity of 48.10 μmol h
−1
g
−1
, which was nearly 3.19 and 1.62 times higher than that of α-Bi
2
O
3
and β-Bi
2
O
3
, respectively. This work indicates how phase structure affects charge separation and photocatalytic activity, and could open new opportunities for achieving highly efficient photocatalysts and reaction systems. |
|---|---|
| ISSN: | 2044-4753 2044-4761 |
| DOI: | 10.1039/D1CY00286D |