Acta Phys. -Chim. Sin. ›› 2025, Vol. 41 ›› Issue (11): 100132.doi: 10.1016/j.actphy.2025.100132

• ARTICLE • Previous Articles     Next Articles

Synergistic carbon doping and Cu loading on boron nitride via microwave synthesis for enhanced atmospheric CO2 photoreduction

Haotong Ma1, Mingyu Heng1, Yang Xu1, Wei Bi1, Yingchun Miao2,*, Shuning Xiao1,*   

  1. 1 School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China
    2 College of Chemistry and Material Engineering, Qujing Normal University, Qujing, 655011, Yunnan Province, China
  • Received:2025-06-25 Revised:2025-07-16 Accepted:2025-07-18 Published:2025-09-29
  • Contact: Miaoyingchun1979@126.com (Yingchun Miao)
  • Supported by:
    the National Natural Science Foundation of China(22106105); the National Natural Science Foundation of China(22406130); the National Natural Science Foundation of China(22408229); Shanghai Science and Technology Innovation Program(22YF1430400); Shanghai Science and Technology Innovation Program(21DZ1206300); Yunnan Provincial University Collaborative Innovation Center (Qujing Green Photovoltaic Industry Collaborative Innovation Center); Yunnan Provincial Science and Technology Department Science Talent and Platform Program (Yunnan Province Li Hexing Expert Workstation)(202305AF150088); Yunnan Provincial Science and Technology Department Science Talent and Platform Program Project (Yunnan Province Shi Zhengrong Academician Workstation)(202405AF140016)

Abstract:

Photocatalytic CO2 reduction under atmospheric concentrations remains highly challenging yet critical for practical carbon-neutral applications. In this study, a Cu-loaded, carbon-doped boron nitride (Cu/BCN) photocatalyst was synthesized by a microwave-assisted molten salt method. This approach enables simultaneous carbon incorporation into the BN lattice and selective deposition of Cu nanoparticles, forming an efficient heterostructure. The synergy between C doping and Cu loading modulates the band structure, enhances visible-light absorption, promotes charge separation, and improves CO2 adsorption. The optimized Cu/BCN photocatalyst achieved a CO production rate of 30.62 μmol·g−1·h−1 with 95.8% selectivity under ambient CO2 conditions. Combined experimental and DFT analyses confirm that the Cu/BCN interface facilitates charge transfer and lowers the energy barrier for *COOH formation. This work demonstrates a promising route toward efficient CO2 utilization directly from air, offering a scalable strategy for atmospheric carbon conversion.

Key words: Microwave synthesis, Carbon-doped boron nitride, Schottky interface, Atmospheric CO2 photoreduction, Cu loading