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Plasmonic Bi-enhanced ammoniated α-MnS/Bi2MoO6 S-scheme heterostructure for visible-light-driven CO2 reduction
Lizhong Liu1, Kai Dai1, Jinfeng Zhang1
1Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, PR China.
Journal of Colloid and Interface Science
|July 24, 2021
Summary
This study introduces a novel S-scheme heterojunction using ammoniated manganese sulfide (α-MnS) and bismuth molybdate (Bi2MoO6) with bismuth surface plasmon resonance (SPR). This composite enhances photocatalytic CO2 reduction by improving redox ability and reducing photocorrosion.
Area of Science:
- Materials Science
- Photocatalysis
- Environmental Chemistry
Background:
- Metal sulfides suffer from low redox ability and photocorrosion, limiting their photocatalytic efficiency.
- Developing stable and efficient photocatalysts is crucial for addressing environmental challenges like CO2 emissions.
Purpose of the Study:
- To fabricate a novel S-scheme heterojunction composite for enhanced photocatalytic CO2 reduction.
- To investigate the synergistic effects of diethylenetriamine (DETA) ammoniation, S-scheme structure, and bismuth surface plasmon resonance (SPR) on photocatalytic activity.
Main Methods:
- Synthesis of diethylenetriamine (DETA) ammoniated MnS (α-MnS) and Bi2MoO6.
- Fabrication of the S-scheme heterojunction composite (Bi-5%M/BMO) incorporating Bi SPR.
- Evaluation of photocatalytic CO2 reduction efficiency by measuring CO evolution rates.
Main Results:
- The Bi-5%M/BMO composite exhibited significantly enhanced CO evolution rates compared to individual components.
- The S-scheme structure effectively suppressed photocorrosion and improved redox ability.
- The Bi SPR effect was found to dramatically promote the separation of photogenerated electron-hole pairs.
Conclusions:
- The developed ammoniated S-scheme heterostructure decorated with SPR offers a promising strategy for designing advanced photocatalysts.
- This approach provides a new perspective for improving CO2 reduction efficiency and mitigating environmental pollution.
