Cu-based Fenton-like systems have demonstrated high effectiveness in the degradation of organic pollutants, however, challenges still exist to overcome the sluggish cycling of metal ions and fast activation of reactants. Herein, a novel n-p type Cu(OH)F/CuO photo-Fenton-like catalyst (CFC) was prepared with in-situ reduction of Cu(OH)F and applied for tetracycline hydrochloride degradation. Under optimized condition, the target catalyst (CFC-5) showed excellent activity, achieving a degradation efficiency of approximately 99.93 % in 30 min. The reaction rate constant with CFC-5 was 4.10 and 3.26 times higher than that of Cu(OH)F and CuO, respectively. Moreover, the Cu(OH)F/CuO catalyst exhibited highly cycling stability and broad applicability. The results illustrate that construction of Cu(OH)F/CuO composites facilitates the charge separation and enhances Cu/Cu cycling, which benefits the generation of highly oxidizing active species and thus significantly improved the degradation efficiency. Besides, this study offers a versatile method to construct inexpensive and efficient photo-Fenton-like heterojunction catalysts.

中文翻译：

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原位还原构建新型 Cu2(OH)3F/Cu2O np 异质结：类光芬顿协同促进高效 Cu2+/Cu+ 循环

铜基类芬顿系统在有机污染物的降解方面表现出高效性，然而，克服金属离子缓慢循环和反应物快速活化的挑战仍然存在。在此，通过原位还原Cu(OH)F制备了一种新型np型Cu(OH)F/CuO类光芬顿催化剂(CFC)，并将其用于盐酸四环素的降解。在优化条件下，目标催化剂（CFC-5）表现出优异的活性，30分钟内降解效率约为99.93%。与CFC-5的反应速率常数分别比Cu(OH)F和CuO高4.10和3.26倍。此外，Cu(OH)F/CuO催化剂表现出高度的循环稳定性和广泛的适用性。结果表明，Cu(OH)F/CuO复合材料的构建促进了电荷分离并增强了Cu/Cu循环，有利于高氧化活性物质的产生，从而显着提高了降解效率。此外，这项研究提供了一种构建廉价且高效的类光芬顿异质结催化剂的通用方法。