Electrospinning-derived La2M′MnO6 (M′=Ni, Co, Fe) fibers for efficient photocatalytic and antibacterial applications

IF 2.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Applied Physics A Pub Date : 2025-10-10 DOI:10.1007/s00339-025-08954-5

Yasmin J, Gracie. P. J, Geetha D.

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Abstract

The distinctive attributes of double perovskite oxides (DPOs) have drawn interest to meet the demands in a wide range of environmental and energy-related fields. This study reports the fabrication of La₂M′MnO₆ (M′=Ni, Co, Fe) double perovskite nanofibers via a polyvinylpyrrolidone (PVP)-assisted electrospinning method followed by calcination at 700 °C. SEM analysis confirmed the polymer burnout and the formation of interconnected fibrous networks. Raman spectroscopy and UV-Vis absorption analysis revealed vibrational features and narrow band gaps between 2.20 and 2.57 eV, favouring visible-light-driven photocatalysis. Photocatalytic studies showed that La₂NiMnO₆ (LNMO) fibers achieved 91% degradation efficiency for methyl orange (MO) and 94% degradation efficiency for crystal violet (CV) dyes under visible light in 180 min. Kinetic analysis confirmed pseudo-first-order reaction rates. Reusability tests over five consecutive cycles showed less than 20% reduction in efficiency, confirming the material’s long-term stability. Scavenger studies identified holes (h⁺) and superoxide radicals (O₂⁻•) as the primary active species. Antibacterial testing demonstrated a zone of inhibition up to 11 mm for E. coli and 10 mm for S. aureus, with enhanced activity attributed to higher membrane permeability and reactive oxygen species (ROS) sensitivity in Gram-negative bacteria. These results position La₂M′MnO₆ fibers as robust, reusable materials for integrated water purification and antibacterial treatment.

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电纺丝衍生La2M ' mno6 （M ' =Ni, Co, Fe）纤维的高效光催化和抗菌应用

双钙钛矿氧化物（DPOs）以其独特的特性引起了人们的兴趣，以满足环境和能源相关领域的广泛需求。本研究采用聚乙烯吡咯烷酮（PVP）辅助静电纺丝法，在700℃下煅烧制备了La2M ' mno6 （M ' =Ni, Co, Fe）双钙钛矿纳米纤维。扫描电镜分析证实了聚合物的烧蚀和相互连接的纤维网络的形成。拉曼光谱和紫外-可见吸收分析显示了振动特征和2.20 ~ 2.57 eV之间的窄带隙，有利于可见光驱动的光催化。光催化研究表明，在可见光下180 min， La2NiMnO6 （LNMO）纤维对甲基橙（MO）的降解效率为91%，对结晶紫（CV）染料的降解效率为94%。动力学分析证实了伪一级反应速率。在连续5个循环的重复使用测试中，效率下降不到20%，证实了材料的长期稳定性。清道夫研究发现，孔洞（h⁺）和超氧自由基（O2⁻•）是主要的活性物质。抗菌测试表明，对大肠杆菌和金黄色葡萄球菌的抑制区分别达11 mm和10 mm，其活性增强归因于革兰氏阴性菌更高的膜通透性和活性氧（ROS）敏感性。这些结果表明，La2M 'MnO6纤维是一种坚固耐用、可重复使用的综合水净化和抗菌处理材料。

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来源期刊

Applied Physics A 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.40%

发文量

964

审稿时长

38 days

期刊介绍： Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.