Tailoring the structural, morphological, optical, photocatalysis, and electrical characteristics of Zn0.5Mg0.5-xCoxLa0.1Fe1.9O4 ferrites across cobalt concentration from x = 0.0–0.2

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-04-27 DOI:10.1016/j.mseb.2025.118352

M.I. Khan , Zahra Saman , Ali Mujtaba , M.S. Hasan , Ming Zhang , Safa Ezzine

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引用次数: 0

Abstract

A novel sol–gel green synthesis approach using ginger extract as a reducing and stabilizing agent was employed to synthesize Zn_0.5Mg_0.5-xCo_xLa_0.1Fe_1.9O₄ (x = 0.0, 0.1, 0.2) spinel ferrites. X-ray diffraction (XRD) confirmed a single-phase cubic spinel structure with crystallite sizes reduced from 37.9 to 28.9 nm and lattice constants enhanced from 8.43 to 8.45 Å. Scanning Electron Microscopy (SEM) revealed enhanced grain size with increasing Co content. UV–vis spectroscopy demonstrated reduced bandgap with Co substitution from 2.07 to 2.06 eV, influencing the enhanced refractive index (n) from 2.603 to 2.606, and decreased extinction coefficient (k) from 2.158 to 2.157. The highest photocatalytic degradation efficiency of 79.0 % for Rhodamine B (RhB) under visible light in 90 min was observed at x = 0.1, attributed to optimal band alignment and charge transport properties. IV-point probe measurements confirmed decreased DC resistivity from 6.38 × 10⁸ to 8.57 × 10⁷ Ω·cm with Co doping, indicating potential applications in optoelectronic and photocatalytic devices.

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在钴浓度x = 0.0-0.2范围内裁剪zn0.5 mg0.5 - xcoxla0.1 fe1.90 o4铁氧体的结构、形态、光学、光催化和电学特性

以姜提取物为还原剂和稳定剂，采用溶胶-凝胶绿色合成方法合成了zn0.5 mg0.5 - xcoxla0.1 fe1.90 o4 （x = 0.0, 0.1, 0.2）尖晶石铁素体。x射线衍射（XRD）证实了一种晶体尺寸从37.9 nm减小到28.9 nm，晶格常数从8.43提高到8.45 Å的单晶立方尖晶石结构。扫描电镜（SEM）显示，随着Co含量的增加，晶粒尺寸增大。紫外可见光谱结果表明，Co取代使带隙从2.07 eV减小到2.06 eV，折射率(n)从2.603提高到2.606，消光系数(k)从2.158降低到2.157。当x = 0.1时，罗丹明B （Rhodamine B, RhB）在可见光下90 min的光催化降解效率最高，达到79.0%，这归功于最佳的能带排列和电荷输运特性。4点探针测量证实，Co掺杂后直流电阻率从6.38 × 108降低到8.57 × 107 Ω·cm，这表明在光电和光催化器件中的潜在应用。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.