Construction of visible light–responsive Z-scheme CdS/BiOI photocatalyst with enhanced photocatalytic CO 2 reduction activity
Abstract Rational construction of Z-scheme photocatalysts and exploration of the Z-scheme charge transfer mechanism have drawn much attention in the field of CO 2 reduction because of its great potential to alleviate energy crisis and environmental problems. In this study, a series of Z-scheme CdS/B...
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| Published in | Journal of materials research Vol. 34; no. 23; pp. 3907 - 3917 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
16.12.2019
|
| Online Access | Get full text |
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| Summary: | Abstract
Rational construction of Z-scheme photocatalysts and exploration of the Z-scheme charge transfer mechanism have drawn much attention in the field of CO
2
reduction because of its great potential to alleviate energy crisis and environmental problems. In this study, a series of Z-scheme CdS/BiOI composites were constructed by depositing CdS nanoparticles on the surface of BiOI nanosheets. The synthesized materials were characterized comprehensively, and their photoreduction CO
2
activities were evaluated. The results show that the composites exhibit higher photoreduction CO
2
activity under visible light irradiation (λ > 400 nm) than pure CdS and BiOI. The yields of CO and CH
4
for the optimal composite after 3 h irradiation are 3.32 and 0.54 μmol/g, respectively. The improved photocatalytic activity is attributed to Z-scheme transfer mode of the photogenerated charges in the composites. The mechanism of CO
2
reduction is proposed and verified experimentally. |
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| ISSN: | 0884-2914 2044-5326 |
| DOI: | 10.1557/jmr.2019.354 |