The risks associated with dye wastewater to the ecological environment are becoming increasingly significant. The efficient utilization and effective protection of water resources have become a persistent challenge. Employing coupling technologies to enhance the wastewater treatment process is an effective strategy for achieving sustainable water resource utilization. Herein, composite catalysts with iron-based metal-organic frameworks loaded with molybdenum disulfide (Fe-MOF@MoS₂) were prepared by a hydrothermal approach. The Fe-MOF@MoS2 composite catalysts demonstrated superior degradation efficiencies towards various organic dyes like methylene blue, rhodamine B, and Congo red, especially in conditions of low hydrogen peroxide concentration and ultrasonic vibration. Results indicated that after 30 minutes of piezoelectric-Fenton-like treatment, the removal efficiency of the above organic dyes exceeded 90 %. The piezoelectric effect led to efficient cyclic conversion of Fe2+/Fe3+ ions, while the inclusion of MoS2 enhanced H2O2 activation efficiency. Moreover, the Fe-MOF@MoS2 catalyst displayed remarkable recycling capabilities, retaining 90 % of its initial catalytic activity even after six degradation cycles. Thus, the development of composite catalysts with combined piezoelectric and Fenton-like functions holds great promise for improving organic dye wastewater treatment and safeguarding environmental and water resources.

中文翻译：

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Fe-MOF@MoS2 催化剂通过类压电芬顿处理增强有机染料的去除


染料废水对生态环境的风险日益显着。水资源的高效利用和有效保护已成为持续存在的挑战。采用耦合技术强化废水处理过程是实现水资源可持续利用的有效策略。在此，通过水热法制备了负载二硫化钼的铁基金属有机骨架复合催化剂（Fe-MOF@MoS2）。 Fe-MOF@MoS2复合催化剂对亚甲基蓝、罗丹明B和刚果红等多种有机染料表现出优异的降解效率，特别是在低过氧化氢浓度和超声波振动的条件下。结果表明，类压电芬顿处理30分钟后，上述有机染料的去除率超过90%。压电效应导致Fe2+/Fe3+离子的有效循环转换，而MoS2的包含增强了H2O2的活化效率。此外，Fe-MOF@MoS2催化剂表现出卓越的回收能力，即使在六次降解循环后仍保留90%的初始催化活性。因此，开发具有压电和类芬顿功能的复合催化剂对于改善有机染料废水处理以及保护环境和水资源具有广阔的前景。