色心缺陷对锌铁氧体的磁性、光学和催化行为的调制

IF 2.5 3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Deepannita Chakraborty , Priyadharsini N , Chaitanya Kumar Kunapalli
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引用次数: 0

摘要

以柠檬皮提取物为还原剂,通过共沉淀法合成纯铁酸锌纳米粒子和掺杂铁酸锌纳米粒子,研究了色心缺陷对其光学、磁性和催化性能的影响。x射线衍射结果表明,纯铁酸锌纳米颗粒和掺杂铁酸锌纳米颗粒具有单相立方尖晶石结构。漫反射光谱显示,由于色心的形成,带隙从4.79 eV减小到3.34 eV。此外,掺杂后光致发光光谱强度的降低支持了色中心的存在。镁(碱土金属)和铝(后过渡金属)掺杂导致F和F+中心缺陷,共掺杂产生M中心缺陷,影响光催化性能。mg掺杂、al掺杂和共掺杂ZnFe2O4在120 min内对MB染料的降解效率分别为80%、83%和75%。此外,al掺杂ZnFe2O4表现出较高的催化稳定性,即使在7次循环后仍保持81.4%的降解效率。掺杂铁氧体的磁性能根据这些色心的存在而变化。本研究强调了金属掺杂对带隙调谐、光催化效率和长期催化稳定性的协同效应,为缺陷工程增强环境修复提供了见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Color center defects on modulating magnetic, optical, and catalytic behavior of zinc ferrites
The impact of color center defects on the optical, magnetic, and catalytic properties of lemon peel extract as reducing agent and synthesized pure and doped zinc ferrite nanoparticles via co-precipitation method. The structural characteristics from X-ray diffraction report single phase cubic spinel structure of pure and doped zinc ferrite nanoparticles. The diffuse reflectance spectroscopy reveals a bandgap reduction from 4.79 to 3.34 eV due to the formation of color centers. Additionally, the decrease in the intensity of the photoluminescence spectra upon doping supports the presence of color centers. Doping with magnesium (alkaline earth metal) and aluminium (post transition metal) induced F and F+ center defects, while the co-doping generates M center defects, influencing photocatalytic performance. The MB dye degradation efficiencies for Mg-doped, Al-doped, and co-doped ZnFe2O4 were 80 %, 83 %, and 75 %, respectively, within 120 min under sunlight. Furthermore, Al-doped ZnFe2O4 demonstrated high catalytic stability, retaining 81.4 % degradation efficiency even after seven cycles. The magnetic properties of doped ferrites vary based on the presence of these color centers. This study highlights the synergistic effect of metal doping on bandgap tuning, photocatalytic efficiency, and long-term catalytic stability, offering insights into defect engineering for enhanced environmental remediation.
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来源期刊
Journal of Magnetism and Magnetic Materials
Journal of Magnetism and Magnetic Materials 物理-材料科学:综合
CiteScore
5.30
自引率
11.10%
发文量
1149
审稿时长
59 days
期刊介绍: The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.
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