Antibacterial Z-scheme ZnIn2S4/Ag2MoO4 composite photocatalytic nanofibers with enhanced photocatalytic performance under visible light. (December 2022)

• Record Type: Journal Article
• Authors: Li, Suyun; Dong, Zhenyou; Wang, Qinqing; Zhou, Xueqing; Shen, Longxiang; Li, Haiqing; Shi, Wenyan
• Is Part Of: Chemosphere. Volume 308:Part 3(2022)
• Publication Date: 2022-12
• Subjects: Photocatalysis -- Z-type heterojunction -- Nanofibers -- Antibacterial activity -- Enrofloxacin; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2022.136386
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Considering the biocompatibility of natural proteins and the strong photo-redox capability of Z-scheme heterojunctions, we fabricated Z-scheme ZnIn2 S4 /Ag2 MoO4 @Zein (Z ZA) photocatalytic membranes via electrospinning and in-situ precipitation for enrofloxacin (ENR) degradation. Z ZA exhibit a fiber structure wrapped with ZnIn2 S4 /Ag2 MoO4 heterojunctions. Photocatalytic studies and various characterization results certified that the Z-scheme structure between ZnIn2 S4 and Ag2 MoO4 significantly increases the lifetime and separation efficiency of photogenerated carriers, which in turn enhances the photodegradation of ENR. The degradation rate of Z ZA-10 (ZnIn2 S4 /10 wt% Ag2 MoO4 @Zein) with the highest catalytic activity could reach 100% within 120 min compared with other samples. For ENR degradation, O2 − radicals were certified to be the primary active species by trapping experiments, and several possible conversion pathways of ENR in photocatalytic reactions were proposed. Furthermore, the antibacterial rates of Z ZA-20 (ZnIn2 S4 /20 wt% Ag2 MoO4 @Zein) against B. subtilis, P. aeruginosa, S. aureus, and E. coli could reach 90.09%, 89.78%, 84.34%, and 95.31%, respectively. Antibacterial evaluations and cytotoxicity assays demonstrated that Z ZA photocatalytic films had desirable antibacterial properties and low cytotoxicity, rendering them safe and effective for use in the treatment of antibiotic wastewater. Graphical abstract: Image 1 Highlights: The ZnIn2 S4 /Ag2 MoO4 @Zein photocatalytic nanofibers was constructed. Composite nanofibers with antibacterial activity can better degrade enrofloxacin pollutants. ZnIn2 S4 /Ag2 MoO4 @Zein membranes have no obvious biological toxicity.