掺杂 Gd3+ 的 ZMF-尖晶铁氧体的发展:结构、磁光增强以及高科技应用中卓越的伽马射线屏蔽性能

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-09-18 DOI:10.1007/s10971-024-06520-8
Huda F. Khalil, Shams A. M. Issa, Sherif G. Elsharkawy, Roya Boudaghi Malidarreh, Sara Gad, Ali Badawi, Fatma Fakhry, Hesham M. H. Zakaly
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引用次数: 0

摘要

在这项研究中,通过柠檬酸盐溶胶-凝胶自燃法在 ZMF-尖晶铁氧体中掺入 Gd3+ 离子显著地改变了它们的结构、磁光和伽马射线衰减特性。从 ZMF0 到 ZMF4 样品的掺杂水平各不相同,Gd3+ 的浓度范围为 0.000 到 0.100。先进的表征技术,如 XRD、SEM、TEM、傅立叶变换红外光谱、拉曼光谱和 XPS,以及紫外-可见光谱和 VSM 测量,凸显了 Gd3+ 掺杂的深远影响。值得注意的是,Gd3+ 的掺入使 ZMF4 样品形成了纳米尺寸的立方体结构,优化结晶尺寸为 19.82 nm,并观察到带隙从 3.21 eV 显著减小到 2.99 eV,这表明电子特性得到了增强。磁性分析表明,ZMF4 向超顺磁性过渡,矫顽力和方正比降低,这表明其可应用于数据存储和光波导等领域。此外,研究还利用 FLUKA 蒙特卡洛模拟来评估这些材料的伽马射线屏蔽效率。研究发现,增加 Gd3+ 浓度或样品厚度可明显改善辐射衰减,突出显示了材料对一系列光子能量的增强屏蔽能力。最重要的发现包括优化样品(ZMF4)显示出卓越的磁光特性和出色的伽马射线屏蔽性能,尤其是在 Gd3+ 浓度较高的情况下。这项研究强调了掺杂 Gd3+ 在提高 ZMF-尖晶铁氧体的功能特性以促进技术和辐射防护应用方面的关键作用,展示了定制纳米材料在应对材料科学领域复杂挑战方面的潜力。
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Advancing ZMF-spinel ferrites with Gd3+ doping: structural, magneto-optical enhancements, and superior gamma-ray shielding for high-tech applications

In this investigation, the incorporation of Gd3+ ions into ZMF-spinel ferrites through the citrate sol-gel auto-combustion method significantly modified their structural, magneto-optical, and gamma-ray attenuation properties. Doping levels were varied across samples labeled ZMF0 to ZMF4 with Gd3+ concentrations ranging from 0.000 to 0.100. Advanced characterization techniques such as XRD, SEM, TEM, FT-IR, Raman spectroscopy, and XPS, alongside UV-vis spectroscopy and VSM measurements, highlighted the profound impact of Gd3+ doping. Notably, the incorporation of Gd3+ led to nano-sized cubic structures with an optimized crystallite size of 19.82 nm in the ZMF4 sample, and a notable reduction in the band gap from 3.21 eV to 2.99 eV was observed, indicative of enhanced electronic properties. Magnetic analysis revealed a transition towards superparamagnetic behavior, with a decrease in coercivity and squareness ratios, suggesting applications in areas such as data storage and optical waveguides. Furthermore, the study leveraged FLUKA Monte Carlo simulations to assess the gamma-ray shielding efficiency of these materials. It was found that increasing Gd3+ concentration or sample thickness markedly improved radiation attenuation, highlighting the material’s enhanced shielding capabilities against a range of photon energies. The most significant findings included the optimized sample (ZMF4) displaying superior magneto-optical characteristics and outstanding gamma-ray shielding performance, especially at higher Gd3+ levels. This investigation underlines the critical role of Gd3+ doping in advancing the functional properties of ZMF-spinel ferrites for technological and radiation protection applications, showcasing the potential of tailored nanomaterials in addressing complex challenges in material science.

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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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