Deepannita Chakraborty , Priyadharsini N , Chaitanya Kumar Kunapalli
{"title":"色心缺陷对锌铁氧体的磁性、光学和催化行为的调制","authors":"Deepannita Chakraborty , Priyadharsini N , Chaitanya Kumar Kunapalli","doi":"10.1016/j.jmmm.2025.173183","DOIUrl":null,"url":null,"abstract":"<div><div>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<sup>+</sup> 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 ZnFe<sub>2</sub>O<sub>4</sub> were 80 %, 83 %, and 75 %, respectively, within 120 min under sunlight. Furthermore, Al-doped ZnFe<sub>2</sub>O<sub>4</sub> 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.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"628 ","pages":"Article 173183"},"PeriodicalIF":2.5000,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Color center defects on modulating magnetic, optical, and catalytic behavior of zinc ferrites\",\"authors\":\"Deepannita Chakraborty , Priyadharsini N , Chaitanya Kumar Kunapalli\",\"doi\":\"10.1016/j.jmmm.2025.173183\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>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<sup>+</sup> 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 ZnFe<sub>2</sub>O<sub>4</sub> were 80 %, 83 %, and 75 %, respectively, within 120 min under sunlight. Furthermore, Al-doped ZnFe<sub>2</sub>O<sub>4</sub> 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.</div></div>\",\"PeriodicalId\":366,\"journal\":{\"name\":\"Journal of Magnetism and Magnetic Materials\",\"volume\":\"628 \",\"pages\":\"Article 173183\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-05-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Magnetism and Magnetic Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0304885325004159\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Magnetism and Magnetic Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304885325004159","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
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.
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.
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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.
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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.