Interface-coupled supramolecular self-assembly 2D Z-scheme TiO2/g-C3N4 heterojunction for efficient degradation of tetracycline under visible light

被引：1
作者：
Shi, Yue [1 ]
Zhao, Ruiqing [1 ]
Yang, Weiwei [1 ]
Bu, Qingwei [1 ]
Yang, Lei [2 ]
Tang, Jianfeng [3 ]
机构：
[1] China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
[2] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
[3] Chinese Acad Sci, Key Lab Urban Environm & Hlth, Inst Urban Environm, Xiamen 361021, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2025年 / 1018卷
关键词：
Supramolecular self-assembly; Photocatalytic degradation; Z -scheme heterojunction; TiO; 2; /g-C; 3; N; 4; Tetracycline; Visible light; ENHANCED PHOTOCATALYTIC ACTIVITY; HYDROGEN-PRODUCTION; TIO2; NANOPARTICLES; CO2; REDUCTION; G-C3N4; NANOSHEETS; WATER; CONSTRUCTION; PERFORMANCE; COMPOSITES;
D O I：
10.1016/j.jallcom.2025.179252
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Tetracycline (TC), a widely used antibiotics, poses environmental risks due to its persistence and bioaccumulation potential. Visible light photocatalysis has emerged as a promising technique for TC degradation. In this study, a supramolecular self-assembled TiO2/g-C3N4 (S-TCN) heterojunction and a weakly mixed TiO2/g- C3N4 (W-TCN) were synthesized via a one-pot method to elucidate the impact of interfacial coupling strength on photocatalytic performance. The results demonstrated that S-TCN, with robust Ti-O-C and N-O-Ti bonds, exhibited enhanced interfacial coupling, reduced interfacial resistance, and increased photocurrent density, improving electron transfer and carrier separation. Under simulated visible light, S-TCN achieved superior TC degradation efficiency (85.0 % within 60 min), outperforming W-TCN and previously reported photocatalysts. Radical scavenging and EPR analyses confirmed center dot O2- as the primary active species, with additional contributions from h+, e-, center dot OH, validating the Z-scheme charge transfer mechanism. UPLC/Q-TOF MS analysis revealed four major TC degradation pathways, including hydroxylation, demethylation, and ring-opening reactions, ultimately mineralizing. Environmental factor assessments demonstrated S-TCN's stable performance across various conditions. This study highlights the critical role of interfacial coupling in photocatalysis and underscores the potential of supramolecular self-assembly in designing advanced photocatalysts for wastewater treatment, providing valuable theoretical and practical insights.
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页数：13
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