BiOCI表面掺杂石墨烯用于可见光下高效光催化胺偶联

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中图分类号：0643 doi： 10.1016/j.actphy.2025.100202

[论文]

Surface doping of graphene into BiOCl for efficient photocatalytic amine coupling under visible light

Xiaofei Zhang 1， Shanhao ， Zhiyuan Wang¹，Long He’， Tiangcheng Huang1， Yongming Xu2 Yucui Bian ¹， Yike Li/1*，Haijun Chen 1*， Zhongjun Li 1 1 College of Chemistry， Zhengzhou University， Zhengzhou 45oo01， Henan Province， China. ² Technology Center， China Tobacco Henan Industrial Co.Ltd.， Zhengzhou 450oo， Henan Province， China.

Abstract：The carbon-doped BiOCl was prepared using glucose as a carbon source.The carbon dopants are mainly concentrated in the surface or shalow lattice of the crystals with partial bonded to oxygen atoms.The conversion of benzylamine for its self-coupling （>99%） is boosted by 12 times over carbon-doped BiOCl that of bare BiOCl under visible light at room temperature using molecular oxygen as a green oxidant.The doped catalyst shows good functional groups toleration of amines and facet-dependent photocatalytic activity. Comprehensive characterizations verify that doping of carbon causes the formation of doping energy level in the original band gap ofcrystal， which widens the absorption range of BiOCl to visible light and decreases its work function. Meanwhile，the doping of carbon also enhances the electric field in the BiOCl and the most efficient dopant is the single and bilayer graphene which can capture the conduction band electrons that are excited to higher energy levels folowing the electron-hole separation.This retards the electrons recombination with holes and improves the separation efficiency of photo-generated carriers. Moreover， the O2 activation is enhanced.This work provides a reference for the rational design of photocatalysts and the realization of highefficiency and directional organic conversion.

Key Words：Photocatalysis;Selective oxidation;Imine synthesis;Carbondoping;Bismuth oxyhalide

1引言

亚胺是农用化学品、药物和许多具有生物活性的含氮化合物的关键中间体[1-5]。（剩余17563字）