物理化学学报 >> 2025, Vol. 41 >> Issue (11): 100132.doi: 10.1016/j.actphy.2025.100132

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微波合成铜负载的碳掺杂氮化硼光催化材料及其大气浓度下CO2还原性能研究

马浩桐1, 衡明宇1, 许杨1, 毕炜1, 缪应纯2,*, 肖舒宁1,*   

  1. 1 上海理工大学材料与化学学院, 上海 200093
    2 曲靖师范学院化学与材料工程学院, 云南 曲靖 655011
  • 收稿日期:2025-06-25 修回日期:2025-07-16 录用日期:2025-07-18 发布日期:2025-09-29
  • 通讯作者: Email: xiaosn@usst.edu.cn (肖舒宁) Email: xiaosn@usst.edu.cn (Shuning Xiao)Miaoyingchun1979@126.com (缪应纯)
  • 基金资助:
    国家自然科学基金(22106105); 国家自然科学基金(22406130); 国家自然科学基金(22408229); 上海市科技创新行动(22YF1430400); 上海市科技创新行动(21DZ1206300); 云南省高校协同创新中心(曲靖绿色光伏产业协同创新中心); 云南省科技厅科技人才与平台计划(云南省李和兴专家工作站)(202305AF150088); 云南省科技厅科技人才与平台计划项目(云南省施正荣院士工作站)(202405AF140016)

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)

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摘要：

在大气浓度下进行光催化CO2还原极具挑战性，但对于实现碳中和技术应用却至关重要。本研究通过微波辅助熔盐法合成了一种负载铜(Cu)的碳(C)掺杂氮化硼(Cu/BCN)光催化剂。该方法能够同时将C引入BN晶格并选择性负载Cu纳米颗粒，形成高效的异质结构。C掺杂与Cu负载之间的协同作用调节了能带结构，增强了可见光吸收，促进了电荷分离，并改善了CO2吸附。优化后的Cu/BCN光催化剂在环境CO2条件下实现了30.62 μmol·g−1·h−1的CO产率，选择性为95.8%。结合实验和DFT分析证实，Cu/BCN界面促进了电荷转移，并降低了*COOH形成的能垒。这项工作展示了直接从空气中高效利用CO2的有前景途径，为大气中的碳转化提供了一种可扩展的策略。

关键词: 微波合成, 碳掺杂氮化硼, 肖特基界面, 大气CO2光还原, 铜负载

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