Ti3C2-assisted construction of Z-scheme MIL-88A(Fe)/Ti3C2/RF heterojunction: Multifunctional photocatalysis-in-situ-self-Fenton catalyst

光催化 催化作用 材料科学 激进的 降级(电信) 光化学 可见光谱 异质结 间苯二酚 环境修复 化学工程 化学 污染 有机化学 电信 生态学 光电子学 计算机科学 工程类 生物
作者
Qi Wang,Hao Zhou,Jianying Qian,Biao Xue,Hao Du,Qiang Hao,Yun Ji,Qiang Li
出处
期刊:Journal of Materials Science & Technology [Elsevier]
被引量:3
标识
DOI:10.1016/j.jmst.2023.11.045
摘要

The applicability of the conventional Fenton reaction is limited due to several factors, including the high cost and slow redox cycle of Fe3+/Fe2+, the requirement for harsh acidic conditions, and the insufficient presence of hydroxyl radicals for the ring-opening reaction. The combination of photocatalysis and Fenton technology to create a photocatalysis-in-situ-self-Fenton (PISF) system is a viable approach for addressing the inherent limitations of conventional Fenton reactions. Herein, a multifunctional PISF system, MIL-88A(Fe)/Ti3C2 MXene/resorcinol-formaldehyde (MIL-88A(Fe)/Ti3C2/RF, MTR) Z-scheme heterojunction, was designed and constructed for degradating organics and inactivating bacteria. With the assistance of Ti3C2, the degradation rate of TC by MTR catalyst was 4.8 times that of MIL-88A(Fe)/RF catalyst under visible light irradiation. Meanwhile, good degradation performance was maintained after 5 cycling tests. The remarkable TC removal efficiency (97.4%) and durability were attributed to the synergistic effect of the photocatalytic reaction and Fenton reaction. The photoinduced holes (h+) assist hydroxyl radicals (•OH) generated by the Fenton reaction for deeply mineralizing TC. The degradation intermediates, potential degradation pathways, and intermediates toxicity were comprehensively investigated to gain a deeper understanding of the catalytic process. Moreover, under visible light irradiation, the MTR killed 97.8% of E. coli and 94.9% of S. aureus within 120 min, demonstrating good antibacterial activity. This work provides a novel strategy to design PISF catalysts for environmental remediation.
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