BiOCl表面掺杂石墨烯用于可见光下高效光催化胺偶联

doi:10.1016/j.actphy.2025.100202

摘要/Abstract

摘要：

以葡萄糖为碳源制备了碳掺杂BiOCl。碳掺杂剂主要富集于晶体表面或浅层晶格中，部分与氧原子成键。在室温可见光条件下，以分子氧为绿色氧化剂，碳掺杂BiOCl催化苄胺自偶联转化率(> 99%)是纯BiOCl的12倍。该掺杂催化剂对胺类底物具有良好官能团耐受性，并表现出晶面依赖的光催化活性。综合表征证实：碳掺杂在晶体原带隙中形成掺杂能级，使BiOCl吸收范围拓宽至可见光区并降低其功函数；同时增强了BiOCl内部电场，其中单层/双层石墨烯为最有效掺杂形态，可捕获经电子-空穴分离后跃迁至高能级的导带电子，从而抑制电子-空穴复合，提高光生载流子分离效率；此外还促进了O₂活化。本研究为光催化剂理性设计及实现高效定向有机转化提供了参考。

关键词: 光催化, 选择性氧化, 亚胺合成, 碳掺杂, 卤氧化铋

Abstract:

The carbon-doped BiOCl was prepared using glucose as a carbon source. The carbon dopants are mainly concentrated in the surface or shallow 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 of crystal, 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 following 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 high-efficiency and directional organic conversion.

Key words: Photocatalysis, Selective oxidation, Imine synthesis, Carbon doping, Bismuth oxyhalide

张小菲, 徐山浩, 王志远, 何龙, 黄天成, 徐永明, 卞玉翠, 李一珂, 陈海军, 李中军. BiOCl表面掺杂石墨烯用于可见光下高效光催化胺偶联[J]. 物理化学学报, 2026, 42(5), 100202. doi: 10.1016/j.actphy.2025.100202

Xiaofei Zhang, Shanhao Xu, Zhiyuan Wang, Long He, Tiancheng Huang, Yongming Xu, Yucui Bian, Yike Li, Haijun Chen, Zhongjun Li. Surface doping of graphene into BiOCl for efficient photocatalytic amine coupling under visible light[J]. Acta Phys. -Chim. Sin. 2026, 42(5), 100202. doi: 10.1016/j.actphy.2025.100202

链接本文: https://www.whxb.pku.edu.cn/CN/10.1016/j.actphy.2025.100202

https://www.whxb.pku.edu.cn/CN/Y2026/V42/I5/100202

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Entry	Catalyst	Conversion (%)	Selectivity (%)
1	No catalyst	0
2 ^b	C-BOC-3	2	99
3 ^c	C-BOC-3	17	99
4 ^d	C-BOC-3	88	99
5	C-BOC-3	99	99
6	BOC	8	99

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