Synergistic enhancement of visible light Photocatalysis: Tailoring dual Z-scheme Fe2O3/C3N4/NH2-MIL-125 ternary composites for organic pollutant degradation

IF 3.4 3区化学 Q2 CHEMISTRY, PHYSICAL Catalysis Communications Pub Date : 2024-02-01 DOI:10.1016/j.catcom.2024.106893

Li-Heng Kao , Jun-Jie Liu , To-Yu Wang , Duo-Syuan Lin , Ying-Shuo Cheng , Chia-Hao Tseng , Kanit Manatura , Wei-Yu Chen , Kun-Yi Andrew Lin , Chao-Wei Huang

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Abstract

In this study, Fe₂O₃/C₃N₄/NH₂-MIL-125 ternary composite photocatalysts were synthesized. Their amino groups provided close bonding between these materials, facilitating the effective separation of electrons and holes. Besides, each component of Fe₂O₃/C₃N₄/NH₂-MIL-125 plays a crucial role. NH₂-MIL-125 provided a high surface area, C₃N₄ contributed to the primary photocatalytic activity, and Fe₂O₃ aided in enhancing light absorption, generating additional potential to produce hydroxyl radicals, thereby further enhancing photocatalytic activity. Moreover, the proportion of loaded Fe₂O₃ and C₃N₄ in the ternary material was investigated. It was found that Fe₂O₃/C₃N₄/NH₂-MIL-125 with a 1:1 ratio of Fe₂O₃ and C₃N₄ (FeCN1:1/NM125) exhibited excellent photocatalytic performance, in which RhB degradation reached 100% under visible light irradiation, conforming to first-order kinetics analysis with a reaction rate constant k of 0.0164 min⁻¹. Its efficiency was twice that of the binary catalyst C₃N₄/NH₂-MIL-125 or Fe₂O₃/NH₂-MIL-125, seven times that of the pristine catalyst C₃N₄, and ten times that of the pristine catalyst NH₂-MIL-125. Scavenger experiments showed that the degradation efficiencies were 52.57%, 55.51%, and 63.41%, respectively, indicating that three active species, namely superoxide radicals, holes, and hydroxyl radicals, made significant contributions to photocatalysis.

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可见光光催化的协同增强：定制用于有机污染物降解的双 Z 型 Fe2O3/C3N4/NH2-MIL-125 三元复合材料

本研究合成了 FeO/CN/NH-MIL-125 三元复合光催化剂。FeO/CN/NH-MIL-125是一种三元复合光催化剂，其氨基酸基团使这些材料之间紧密结合，从而促进了电子和空穴的有效分离。此外，FeO/CN/NH-MIL-125 中的每种成分都起着至关重要的作用。NH-MIL-125 提供了高比表面积，CN 促进了主要的光催化活性，而 FeO 则有助于增强光吸收，产生更多的羟基自由基，从而进一步提高光催化活性。此外，还研究了三元材料中负载的 FeO 和 CN 的比例。研究发现，FeO/CN/NH-MIL-125 中 FeO 和 CN 的比例为 1:1（FeCN1:1/NM125），具有优异的光催化性能，在可见光照射下，RhB 降解率达到 100%，符合一阶动力学分析，反应速率常数 k 为 0.0164 分钟。其效率是二元催化剂 CN/NH-MIL-125 或 FeO/NH-MIL-125 的两倍，原始催化剂 CN 的七倍，原始催化剂 NH-MIL-125 的十倍。清除剂实验表明，降解效率分别为 52.57%、55.51% 和 63.41%，这表明超氧自由基、空穴和羟基自由基这三种活性物种在光催化中做出了重要贡献。

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来源期刊

Catalysis Communications 化学-物理化学

CiteScore

6.20

自引率

2.70%

发文量

183

审稿时长

46 days

期刊介绍： Catalysis Communications aims to provide rapid publication of significant, novel, and timely research results homogeneous, heterogeneous, and enzymatic catalysis.