<br>全固态Z型ZnFe–LDH/rGO/g-C3N5异质结增强环丙沙星声光催化降解：性能和机理见解,Environmental Research

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全固态Z型ZnFe–LDH/rGO/g-C3N5异质结增强环丙沙星声光催化降解：性能和机理见解
Environmental Research ( IF 7.7 ) Pub Date : 2024-01-17 , DOI: 10.1016/j.envres.2024.118209
Yeonji Yea ₁ , S Sd Elanchezhiyan ₂ , R Saravanakumar ₂ , Govindan Jagan ₁ , Jong Uk Choi ₁ , Karunamoorthy Saravanakumar ₁ , Chang Min Park ₁

Affiliation

全固态 Z 型声光催化剂的制造对于提高光生电子的传输速率以去除废水中的抗生素至关重要。在此，使用简单的策略合成了一种新型间接Z型ZnFe层状双氢氧化物（LDH）/还原氧化石墨烯（rGO）/石墨氮化碳（g-CN）异质结。使用不同的技术对 ZnFe-LDH/rGO/g-CN (ZF@rGCN) 三元复合材料进行系统表征。结果表明，通过声催化和光催化的协同作用，15%ZF@rGCN 催化剂对环丙沙星 (CIP) 的降解效率达到 95%。 ZF@rGCN异质结声光催化性能的提高归因于活性位点数量的增加、ZF@rGCN中Z型电荷转移通道以及可见光响应范围的扩展。 rGO的引入进一步提高了电荷转移速率并保留了ZF@rGCN系统的还原和氧化位点，从而提供了额外的活性物质来参与CIP去除。此外，由于其独特的性质，rGO可能增加对入射光的吸收，并在形成的ZF@rGCN催化剂中充当电子桥。最后，提出了ZF@rGCN可能的CIP降解途径和声光催化Z型电荷迁移途径。这项研究提出了一种制造用于环境修复的高效 Z 型声光催化剂的新方法。

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All-solid-state Z-scheme ZnFe–LDH/rGO/g-C3N5 heterojunction for enhanced sonophotocatalytic degradation of ciprofloxacin: Performance and mechanistic insights

The fabrication of all-solid-state Z-scheme sonophotocatalysts is vital for improving the transfer rate of photogenerated electrons to remove antibiotics present in wastewater. Herein, a novel indirect Z-scheme ZnFe-layered double hydroxide (LDH)/reduced graphene oxide (rGO)/graphitic carbon nitride (g-CN) heterojunction was synthesized using a simple strategy. The ZnFe–LDH/rGO/g-CN (ZF@rGCN) ternary composites were systematically characterized using different techniques. Results revealed that the 15%ZF@rGCN catalyst achieved a ciprofloxacin (CIP) degradation efficiency of 95% via the synergistic effect of sonocatalysis and photocatalysis. The improved sonophotocatalytic performance of the ZF@rGCN heterojunction was attributed to an increase in the number of active sites, a Z-scheme charge-transfer channel in ZF@rGCN, and an extended visible light response range. The introduction of rGO further enhanced the charge-transfer rate and preserved the reductive and oxidative sites of the ZF@rGCN system, thereby affording additional reactive species to participate in CIP removal. In addition, owing to its unique properties, rGO possibly increased the absorption of incident light and served as an electronic bridge in the as-formed ZF@rGCN catalyst. Finally, the possible CIP degradation pathways and the sonophotocatalytic Z-scheme charge-migration route of ZF@rGCN were proposed. This study presents a new approach for fabricating highly efficient Z-scheme sonophotocatalysts for environmental remediation.

更新日期：2024-01-17

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