Flower-like NiFe layered double hydroxide/Bi2WO6 S-scheme heterojunction for photodegradation of ciprofloxacin under visible light

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2024-10-03 DOI:10.1016/j.surfin.2024.105213

Qinghua Liu , Xintong Yao , Xujing Zhao , Feiyang Zhang , Dafeng Zhang , Junchang Liu , Peiqing Cai , Xipeng Pu

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Abstract

Photocatalytic degradation stands as an effective remedy to solve the global environmental pollution caused by organic pollutants. In this study, we synthesized a NiFe layered double hydroxide/Bi₂WO₆ (NF-LDH/BWO) Step-scheme (S-scheme) heterojunction. The attachment of NF-LDH particles on flower-like BWO increased the active sites and the interface area between two pure materials. The construction of LDH/BWO heterojunction endowed with improved light absorption capacity and boosted separation efficiency of photo-generated carriers. Consequently, compared with BWO and NF-LDH, the NF-LDH/BWO composites showed enhanced photoactivities. At NF-LDH mass ratio of 10%, the optimal degradation rate of ciprofloxacin (75.9%) within 60 min under visible illumination was achieved, 1.43- and 9.37-fold those of BWO and NF-LDH, respectively. In addition, the NF-LDH/BWO composite also demonstrated excellent cyclic stability. The S-scheme mechanism was proposed based on both experimental and density functional calculation results.

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在可见光下光降解环丙沙星的花状镍铁层双氢氧化物/Bi2WO6 S 型异质结

光催化降解是解决有机污染物造成的全球环境污染的有效方法。在这项研究中，我们合成了镍铁合金层状双氢氧化物/Bi2WO6（NF-LDH/BWO）阶梯型（S-scheme）异质结。花状 BWO 上附着的 NF-LDH 颗粒增加了两种纯材料之间的活性位点和界面面积。LDH/BWO 异质结的构建改善了光吸收能力，提高了光生载流子的分离效率。因此，与 BWO 和 NF-LDH 相比，NF-LDH/BWO 复合材料显示出更强的光活性。当 NF-LDH 的质量比为 10%时，环丙沙星在可见光照射下 60 分钟内的最佳降解率为 75.9%，分别是 BWO 和 NF-LDH 的 1.43 倍和 9.37 倍。此外，NF-LDH/BWO 复合材料还表现出优异的循环稳定性。根据实验和密度泛函计算的结果，提出了 S 型机制。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.