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Facile synthesis of novel NH2-MIL-53(Fe)/AgSCN heterojunction composites as a highly efficient photocatalyst for ciprofloxacin degradation and H2 production under visible-light irradiation
Reaction Chemistry & Engineering ( IF 3.9 ) Pub Date : 2021-10-19 , DOI: 10.1039/d1re00349f
Jungang Yi 1 , Xianghui Wu 1 , Huadong Wu 1 , Jia Guo 1 , Kun Wu 1, 2 , Linfeng Zhang 1, 3
Affiliation  

With the aim of solving the increasingly serious problem of environmental pollution and the energy crisis, in this work a novel NH2-MIL-53(Fe)/AgSCN (NMFA) composite photocatalyst was successfully prepared through a one-step chemical precipitation method. The prepared composites demonstrate an excellent photocatalytic performance for ciprofloxacin (CIP) and rhodamine B (RhB) degradation under visible-light irradiation. Within 60 min, the degradation rate for CIP and RhB reached 90% and 100%, respectively, which was 1.84/3.33 times and 1.79/2.04 times greater than that of the single NH2-MIL-53(Fe) and AgSCN samples. Furthermore, the H2 production rate of the NMFA-5 composite was 4742 μmol g−1 h−1, which was 5.25 and 17.37 times greater than that of the pure samples. Owing to the combination of NH2-MIL-53(Fe) and AgSCN, the separation and transmission efficiency of the photon-generated carriers in the composites was improved, which was demonstrated using optical characterization and a series of electrochemical characterization techniques. In addition, a possible mechanism for the excellent photocatalytic performance of the NMFA composites is discussed. The work in this paper may provide a technical reference for the application of silver modified metal organic frameworks (MOFs)-based composite photocatalysts for the treatment of environmental remediation.

中文翻译:

轻松合成新型 NH2-MIL-53(Fe)/AgSCN 异质结复合材料作为高效光催化剂在可见光照射下降解环丙沙星和制氢

为解决日益严重的环境污染和能源危机问题,本工作通过一步化学沉淀法成功制备了一种新型NH 2 -MIL-53(Fe)/AgSCN(NMFA)复合光催化剂。制备的复合材料在可见光照射下对环丙沙星 (CIP) 和罗丹明 B (RhB) 的降解表现出优异的光催化性能。在 60 分钟内,CIP 和 RhB 的降解率分别达到 90% 和 100%,分别是单一 NH 2 -MIL-53(Fe) 和 AgSCN 样品的1.84/3.33 倍和 1.79/2.04 倍。此外,NMFA-5复合材料的H 2产率为4742 μmol g -1 h -1,分别是纯样品的 5.25 和 17.37 倍。由于NH 2 -MIL-53(Fe)和AgSCN的结合,提高了复合材料中光生载流子的分离和传输效率,这通过光学表征和一系列电化学表征技术得到了证明。此外,讨论了 NMFA 复合材料优异的光催化性能的可能机制。本文的工作可为银改性金属有机骨架(MOFs)基复合光催化剂在环境修复中的应用提供技术参考。
更新日期:2021-11-16
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