Photocatalytic performance is significantly influenced by the efficiency of photogenerated electron-hole pairs separation and transfer. In this paper, rational designed Z-scheme Bi/Black Phosphorus Nanosheets/P-doped BiOCl (Bi/BPNs/P–BiOCl) nanoflower photocatalyst was synthesized by a facile in-situ reduction process. The interfacial P–P bond between Black phosphorus nanosheets (BPNs) and P-doped BiOCl (P–BiOCl) was investigated by the XPS spectrum. The Bi/BPNs/P–BiOCl photocatalysts exhibited enhanced photocatalytic performance for H₂O₂ production and RhB degradation. The optimally modified photocatalyst (Bi/BPNs/P–BiOCl-20) showed an excellent photocatalytic H₂O₂ generation rate of 4.92 mM/h and RhB degradation rate of 0.1169 min⁻¹ under simulated sunlight irradiation, which was 1.79 times and 1.25 times greater than the P–P bond free Bi/BPNs/BiOCl-20. The mechanism was investigated through charge transfer route, radical capture experiments, and band gap structure analysis, indicating that the formation of Z-scheme heterojunctions and interfacial P–P bond not only enhances the redox potential of the photocatalyst but also facilitates the separation and migration of photogenerated electrons-holes. This work might provide a promising strategy for constructing Z-scheme 2D composite photocatalysts combining interfacial heterojunction and elemental doping engineering for efficient photocatalytic H₂O₂ production and organic dye pollutant degradation.

光催化性能受光生电子-空穴对分离和转移效率的显着影响。在本文中，通过简便的原位还原工艺合成了合理设计的 Z 型 Bi/黑磷纳米片/P 掺杂 BiOCl (Bi/BPNs/P–BiOCl) 纳米花光催化剂。通过 XPS 光谱研究了黑磷纳米片 (BPNs) 和 P 掺杂的 BiOCl (P-BiOCl) 之间的界面 P-P 键。Bi/BPNs/P-BiOCl 光催化剂在 H ₂ O ₂产生和 RhB 降解方面表现出增强的光催化性能。优化修饰的光催化剂 (Bi/BPNs/P–BiOCl-20) 表现出优异的光催化 H ₂ O ₂生成速率 4.92 mM/h 和 RhB 降解速率 0.1169 min^-1在模拟阳光照射下，比无 P-P 键的 Bi/BPNs/BiOCl-20 高 1.79 倍和 1.25 倍。通过电荷转移途径、自由基捕获实验和带隙结构分析研究了该机理，表明Z型异质结和界面P-P键的形成不仅提高了光催化剂的氧化还原电位，而且促进了分离和迁移光生电子空穴。这项工作可能为构建 Z 型二维复合光催化剂提供一种有前途的策略，结合界面异质结和元素掺杂工程，以实现高效的光催化 H ₂ O ₂生产和有机染料污染物降解。