MOF-derived ZnO/PANI S-scheme heterojunction for efficient photocatalytic phenol mineralization coupled with H2O2 generation

IF 10.8 2区化学 Q1 CHEMISTRY, PHYSICAL

物理化学学报 Pub Date : 2025-06-17 DOI:10.1016/j.actphy.2025.100121

Bowen Liu , Jianjun Zhang , Han Li , Bei Cheng , Chuanbiao Bie

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Abstract

Complete mineralization of persistent organic pollutants in wastewater remains a formidable challenge. Here, we report the rational design of a ZIF-8-derived ZnO/polyaniline (PANI) S-scheme heterojunction synthesized via in situ oxidative polymerization. Advanced characterizations confirm the S-scheme charge transfer mechanism within the ZnO/PANI heterojunction. The optimized composite achieves complete phenol mineralization within 60 min while concurrently generating H₂O₂ at a rate of 0.75 mmol∙L⁻¹·h⁻¹ under simulated solar irradiation. Mechanistic studies verify that the S-scheme heterojunction retains strong redox potentials, driving the formation of reactive oxygen species for H₂O₂ production and phenol degradation. This work establishes a universal design paradigm for MOF-derived inorganic/organic S-scheme heterojunctions, effectively coupling solar-driven energy conversion with environmental remediation.

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mof衍生的ZnO/PANI s型异质结用于光催化苯酚矿化和H2O2生成

废水中持久性有机污染物的完全矿化仍然是一个艰巨的挑战。在这里，我们报道了通过原位氧化聚合合成zif -8衍生的ZnO/聚苯胺（PANI） s型异质结的合理设计。进一步的表征证实了ZnO/PANI异质结中的S-scheme电荷转移机制。在模拟太阳照射下，优化后的复合材料在60 min内实现了苯酚的完全矿化，同时以0.75 mmol∙L−1·h−1的速率生成H2O2。机理研究证实，s型异质结保持了很强的氧化还原电位，推动了活性氧的形成，用于H2O2的产生和苯酚的降解。这项工作建立了mof衍生的无机/有机s -方案异质结的通用设计范式，有效地将太阳能驱动的能量转换与环境修复相结合。

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