The Cu-based heterogeneous photo-Fenton-like process has emerged as a promising technology in wastewater treatment, but efficient light harvesting and sufficient utilization of photogenerated electrons are still core issues. Herein, a dual strategy was proposed to achieve the high-efficiency removal of refractory organic pollutants using a Cu-doped zeolite with Cu⁰ and oxygen vacancies (Cu⁰@CuZ) in the photo-Fenton-like reaction. This is the first time that such a strategy employing Cu-based zeolites has been used. Cu⁰@CuZ can completely degrade 20 mg L⁻¹ phenol within 15 min under visible-light irradiation, and the rate constant was 40, 55, and 65 times higher than Cu₂O, CuO, and Cu⁰, respectively. Cu⁰@CuZ also presented excellent degradation performance for other typical refractory organic pollutants, surpassing most of the reported Cu-based catalysts to date. This superior performance highly depends on oxygen vacancies (Vo) and plasmonic Cu nanoparticles. The introduction of Vo and the creation of the surface plasmon resonance effect greatly enhanced the visible-light harvesting ability of the catalyst. Impressively, Vo and Cu⁰ nanoparticles served as dual-channels for efficient electron transfer by enriching and then transferring photogenerated electrons to Cu(II), greatly expediting the reduction of Cu(II) to Cu(I). The synergistic effects of the dual-channel electron transfer and light-harvesting ability achieved sustained Cu(II)/Cu(I) cycling, thereby promoting H₂O₂ activation to produce more active species for organic pollutant degradation. This work provides an ingenious strategy to rationally establish a high-efficiency photo-Fenton-like catalyst for water remediation.

中文翻译：

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铜基沸石中 Cu0 和氧空位的综合作用可实现高效的类光芬顿水净化性能

铜基异质类光芬顿过程已成为废水处理中一项有前景的技术，但高效的光捕获和光生电子的充分利用仍然是核心问题。在此，提出了一种双重策略，以在光芬顿反应中使用具有Cu ⁰和氧空位的Cu掺杂沸石（Cu ⁰ @CuZ）实现难降解有机污染物的高效去除。这是首次使用这种采用铜基沸石的策略。 Cu ⁰ @CuZ在可见光照射下可在15 min内完全降解20 mg L ^{-1苯酚，其速率常数分别比Cu} ₂ O、CuO和Cu ⁰高40、55和65倍。 Cu ⁰ @CuZ 对其他典型难降解有机污染物也表现出优异的降解性能，超过了迄今为止报道的大多数铜基催化剂。这种优异的性能很大程度上取决于氧空位 (Vo) 和等离子体铜纳米颗粒。 Vo的引入和表面等离子体共振效应的产生极大地增强了催化剂的可见光捕获能力。令人印象深刻的是，Vo和Cu ⁰纳米粒子通过富集然后将光生电子转移到Cu( II )来充当有效电子转移的双通道，极大地加速了Cu( II )到Cu( I )的还原。双通道电子转移和光捕获能力的协同作用实现了持续的Cu( II )/Cu( I )循环，从而促进H ₂ O ₂活化，产生更多的有机污染物降解活性物种。这项工作为合理建立高效光芬顿催化剂用于水体修复提供了巧妙的策略。