Construction of a hierarchical BiOBr/C3N4 S-scheme heterojunction for selective photocatalytic CO2 reduction towards CO

Literature Information

Publication Date 2023-11-02
DOI 10.1039/D3TA05388A
Impact Factor 12.732
Authors

Wei Tao, Qiaoya Tang, Jianqiang Hu, Zhipeng Wang, Baojiang Jiang, Yuting Xiao, Renjie Song, Shien Guo


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Abstract

Photocatalytic CO2 reduction is an ideal strategy to simultaneously alleviate environmental concerns and address carbon neutrality; however, this process remains challenging because of the sluggish charge-carrier separation efficiency. Herein, we depict a unique hierarchical S-scheme heterojunction photocatalyst constructed via in situ growth of BiOBr nanosheets on microtubular C3N4 (denoted as BiOBr/TCN). The hierarchical structure provides sufficient active sites and an improved CO2 uptake capacity, enabling enhanced catalytic reaction kinetics. The established S-scheme heterojunction endows the BiOBr/TCN photocatalyst with boosted charge carrier separation efficacy and retainment of the highest redox ability, which was corroborated by the density functional theory calculations and electron paramagnetic resonance analysis. Profiting from synergistic enhancement of charge separation and surface reactions, the synthesized BiOBr/TCN hybrid affords CO as the sole carbonaceous product with a production rate of 10.89 μmol g−1 h−1, which is approximately 8.1 times higher than that of bulk C3N4 under visible-light irradiation. This study presents a promising strategy for the development of effective S-scheme heterojunction photocatalysts for CO2 reduction.

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Source Journal

Journal of Materials Chemistry A

Journal of Materials Chemistry A
CiteScore: 19.5
Self-citation Rate: 4.7%
Articles per Year: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

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