题目：Z-scheme heterojunction with spatially separated dual redox-active sites for coupled carbon dioxide photoreduction and tetracycline photooxidation

作者：Shuang Li（李爽，2022级研究生）, Haili Lin, Xuemei Jia*（贾雪梅, Qianlong Wang, Haoyu Zhang, Yujie Zhang, Xiaoxin Feng, Shifu Chen, Jing Cao*（曹静）

单位：Key Laboratory of Green and Precise Synthetic and Applications, Ministry of Education; Anhui Provincial Key Laboratory of Synthetic Chemistry and Applications; College of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China

摘要：Coupling solar-powered CO₂ conversion with pollutant removal via Z-scheme heterojunctions offers a promising strategy to simultaneously address energy and environmental challenges. However, achieving efficient charge separation and optimizing active sites for both reduction and oxidation reactions are still significant challenges. Herein, a Z-scheme heterojunction photocatalyst with spatially separated dual active sites (hydroxyl-functionalized red phosphorus (HRP) and amino-functionalized graphitic carbon nitride (ACN)) was developed to enable the concurrent photoreduction of CO₂ and photooxidation of tetracycline (TC). The optimized heterojunction, incorporating 1.25 wt% HRP, achieved a 4.96-fold increase in CO yield and 1.09-fold improvement in TC degradation compared with a red phosphorus/graphitic carbon nitride (RP/CN) system without surface functionalization. Density functional theory calculations and experimental analyses confirmed a Z-scheme charge transfer mechanism wherein hydroxyl groups facilitated hole-mediated TC oxidation and amino groups promoted electron-driven CO₂ reduction. The 1.25HRP/ACN photocatalyst demonstrated an electron transfer efficiency of 87.8%, significantly surpassing the 64.9% observed for 1.25RP/CN, highlighting the synergistic benefits of dual-site engineering. This study provides detailed insights into dual-functionalized Z-scheme heterojunctions with spatially separated redox-active sites, advancing the design of integrated systems for solar fuel generation and environmental remediation.

 影响因子：9.7

 分区情况：一区

 链接：https://doi.org/10.1016/j.jcis.2025.138218

 年、卷、页：2025，699，138218.

（文、图：贾雪梅 /   审核：韩满意 /   审校：曹静 /    终审：杨振兴）