Bi2MoO6 Embedded in 3D Porous N,O-Doped Carbon Nanosheets for Photocatalytic CO2 Reduction

Artificial photosynthesis is promising to convert solar energy and CO2 into valuable chemicals, and to alleviate the problems of the greenhouse effect and the climate change crisis. Here, we fabricated a novel photocatalyst by directly growing Bi2MoO6 nanosheets on three-dimensional (3D) N,O-doped c...

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Published inNanomaterials (Basel, Switzerland) Vol. 13; no. 9; p. 1569
Main Authors Bai, Xue, He, Lang, Zhang, Wenyuan, Lv, Fei, Zheng, Yayun, Kong, Xirui, Wang, Du, Zhao, Yan
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 06.05.2023
MDPI
Subjects
Adsorption
Bi2MoO6
Carbon
Carbon dioxide
Catalysts
Charge transfer
Climate change
CO2RR
Current carriers
Decomposition
Diffusion layers
Diffusion rate
Electron microscopy
Electron transfer
Ethanol
Fossil fuels
Greenhouse effect
Morphology
N,O-doped carbon
Nanosheets
Nanostructure
Photocatalysis
Photocatalysts
Photosynthesis
Scanning electron microscopy
Solar energy
Solar energy conversion
Synergistic effect
Transmission electron microscopy
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Summary:Artificial photosynthesis is promising to convert solar energy and CO2 into valuable chemicals, and to alleviate the problems of the greenhouse effect and the climate change crisis. Here, we fabricated a novel photocatalyst by directly growing Bi2MoO6 nanosheets on three-dimensional (3D) N,O-doped carbon (NO-C). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show that the designed photocatalyst ensured the close contact between Bi2MoO6 and NO-C, and reduced the stacking of the NO-C layers to provide abundant channels for the diffusion of CO2, while NO-C can allow for fast electron transfer. The charge transfer in this composite was determined to follow a step-scheme mechanism, which not only facilitates the separation of charge carriers but also retains a strong redox capability. Benefiting from this unique 3D structure and the synergistic effect, BMO/NO-C showed excellent performance in photocatalytic CO2 reductions. The yields of the best BMO/NO-C catalysts for CH4 and CO were 9.14 and 14.49 μmol g−1 h−1, respectively. This work provides new insights into constructing step-scheme photocatalytic systems with the 3D nanostructures.
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These authors contributed equally to this work.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano13091569