Sustainable versus conventional approaches: dual-doped α-Fe2O3 nanoparticles for enhanced photocatalytic and antioxidant performance

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Frontiers of Materials Science Pub Date : 2026-02-19 DOI:10.1007/s11706-026-0752-5

Pankaj Kumar, Ashwani Tapwal, Ashwani Kumar, Naveen Thakur

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Abstract

Dye pollutions are persistent organic pollutants that are receiving much attention. Magnetic nanoparticles (NPs) are substantial compounds for the removal of organic dyes from wastewater. In this study, Azadirachta indica (A. indica) extract and polyvinylpyrrolidone (PVP) polymer were used as an encapsulating agent for Ni/Cu-doped α-Fe₂O₃ NPs. Those NPs exhibit rhombohedral crystals with the crystallite size of 14–22 nm in a spherical shape, which have a saturation magnetization value approximately between 30 and 36 emu·g⁻¹ under ambient conditions. Bismarck brown Y (BBY) and Rhodamine B (RhB) dyes were used to test the photocatalytic activity, and results showed that Fe₂O₃ had a removal efficiency up to 96%–98% in 60 min. Fe₂O₃ NPs also demonstrated antioxidant potential against the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, and results suggest that A. indica-encapsulated Fe₂O₃ NPs are potentially fascinating due to greater accessibility of bioactive constituents with antioxidant activities. This research synthesizes biologically generated doped α-Fe₂O₃ NPs with unique structural and morphological features, offering multifunctional applications like antioxidant and photocatalytic capabilities. These novel properties offer potential uses in a diversity of industries, such as environmental cleanup, energy conversion, and biomedical applications.

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可持续与传统方法：双掺杂α-Fe2O3纳米颗粒增强光催化和抗氧化性能

染料污染是目前备受关注的持久性有机污染物。磁性纳米颗粒（NPs）是去除废水中有机染料的重要化合物。本研究采用印楝（A. indica）提取物和聚乙烯吡咯烷酮（PVP）聚合物作为Ni/ cu掺杂α-Fe2O3 NPs的包封剂。这些纳米粒子呈菱面体晶体，晶体尺寸为14 ~ 22 nm，呈球形，在环境条件下饱和磁化值约为30 ~ 36 emu·g−1。采用俾斯麦棕Y （BBY）和罗丹明B （RhB）染料进行光催化活性测试，结果表明，60 min内Fe2O3的去除率可达96% ~ 98%。Fe2O3 NPs还显示出对1,1-二苯基-2-吡啶肼基（DPPH）自由基的抗氧化潜力，结果表明，由于具有抗氧化活性的生物活性成分更易接近，紫花甘蓝封装的Fe2O3 NPs具有潜在的吸引力。本研究合成了具有独特结构和形态特征的生物生成掺杂α-Fe2O3纳米粒子，具有抗氧化和光催化等多功能应用。这些新特性在环境清理、能源转换和生物医学应用等多种行业中提供了潜在的用途。

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来源期刊

Frontiers of Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.20

自引率

3.70%

发文量

515

期刊介绍： Frontiers of Materials Science is a peer-reviewed international journal that publishes high quality reviews/mini-reviews, full-length research papers, and short Communications recording the latest pioneering studies on all aspects of materials science. It aims at providing a forum to promote communication and exchange between scientists in the worldwide materials science community. The subjects are seen from international and interdisciplinary perspectives covering areas including (but not limited to): Biomaterials including biomimetics and biomineralization; Nano materials; Polymers and composites; New metallic materials; Advanced ceramics; Materials modeling and computation; Frontier materials synthesis and characterization; Novel methods for materials manufacturing; Materials performance; Materials applications in energy, information and biotechnology.