Details

Autor(en) / Beteiligte

• Ma, Hao
• Huang, Chunyan
• Tan, Tianqi
• Li, Wenting
• Xu, Wei
• Shen, Yu
• Li, Yuhan
• Fang, Ruimei
• Dong, Fan

Titel

S-Scheme heterojunction of Cs 2 SnBr 6 /C 3 N 4 with interfacial electron exchange toward efficient photocatalytic NO abatement

Ist Teil von

• Journal of colloid and interface science, 2024-05, Vol.671, p.486

Ort / Verlag

United States

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Photocatalytic technology is of great significance in environmental purification due to its eco-friendly and cost-effective operations. However, low charge-transfer efficiency restricts the photocatalytic activity of the catalyst. Herein, we report Cs SnBr /C N composite catalysts that exhibit a robust interfacial electron exchange thereby enhancing photocatalytic nitric oxide (NO) oxidation. A comprehensive study has demonstrated the S-scheme electron transfer mechanism. Benefiting from the interfacial internal electric field, the C-Br bond serves as a direct electron transfer channel, resulting in enhanced charge separation. Furthermore, the S-scheme heterojunction effectively traps high redox potential electrons and holes, leading to the production of abundant reactive oxygen radicals that enhance photocatalytic NO abatement. The NO removal rate of the Cs SnBr /C N heterogeneous system can reach 86.8 %, which is approximately 3-fold and 18-fold that of pristine C N and Cs SnBr , respectively. The comprehensive understanding of the electron transfer between heterojunction atomic interfaces will provide a novel perspective on efficient environmental photocatalysis.