Acta Phys. -Chim. Sin. ›› 2026, Vol. 42 ›› Issue (9): 100258.doi: 10.1016/j.actphy.2026.100258

• ARTICLE • Previous Articles     Next Articles

MA3Bi2Br9/g-C3N4 0D/2D S-scheme heterojunction for selective photooxidation of toluene

Lishan Chen1, Xuemei Li1,2, Xiangju Xu1, Youqing Dong1,*(), Quanlong Xu1,*()   

  1. 1 Wenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang International Joint Laboratory of Optical Functional Materials, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, Zhejiang Province, China
    2 Xinjiang Key Laboratory of New Energy and Energy Storage Technology, Xinjiang Institute of Technology, Aksu 843100, Xinjiang Uygur Autonomous Region, China
  • Received:2026-01-23 Revised:2026-02-09 Accepted:2026-02-10 Published:2026-07-03
  • Contact: Email: yqdong@wzu.edu.cn (Youqing Dong)xuql@wzu.edu.cn (Quanlong Xu)

Abstract:

Toluene to high-value benzaldehyde conversion remains a great challenge due to the reactive inertness of sp3 C–H bonds. Herein, MA3Bi2Br9/g-C3N4 heterojunction was precisely fabricated by employing an in situ growth approach, and O2 molecule was used as the green oxidant. Band structure analysis and advanced characterizations demonstrate the S-scheme mechanism working on the MA3Bi2Br9/g-C3N4 heterojunction, thus enabling the powerful photogenerated electron/holes pairs and large driven force for generating ·O2– species, a critical reactive oxygen species in selective oxidation of toluene. The optimized 20%MA3Bi2Br9/g-C3N4 displays enhanced toluene conversion and product selectivity, reaching 27.4% conversion and 94.2% benzaldehyde selectivity within 4 h. This study provides a universal strategy for future exploration of novel heterojunctions capable of high photocatalytic performance in converting hydrocarbons to high-value chemicals.

Key words: Lead-free perovskite, Toluene oxidation, g-C3N4 nanosheets, S-scheme heterojunction