过渡金属（TM = Cr, Fe, Co, Ni, Cu）掺杂对微波合成β-Bi2O3纳米颗粒形貌、光致发光和拉曼特性的影响研究

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-06-20 DOI:10.1016/j.jallcom.2025.181754

Gaurav Ashok Bhaduri, Mohd. Aurif Shergujri, Balwant Yadav, Ashutosh Bhattu

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引用次数: 0

摘要

Bi2O3是一种重要的半导体材料，由于其具有可变带隙和优异的生物相容性而被广泛应用。本研究采用微波辅助固-固燃烧法合成β-Bi2O3。研究了过渡金属离子（Cr、Fe、Co、Ni、Cu）掺杂Bi2O3及其对形貌光致发光（PL）和表面增强拉曼光谱（SERS）的影响。利用扫描电子显微镜、能量色散x射线光谱、x射线衍射、傅里叶变换红外光谱、拉曼光谱、紫外可见吸收和x射线光电子能谱对所有合成材料进行了表征。掺杂金属对合成的β-Bi2O3的形貌和光学性能有影响。所有掺杂和纯Bi2O3对亚甲基蓝（MB）的SERS增强倾向于达到最小100ppm，其顺序为β-Bi2O3-Cr>；β-Bi2O3-Fe>β-Bi2O3>β-Bi2O3-Ni>β-Bi2O3-Co>β-Bi2O3-Cu。β-Bi2O3- cr的SERS增强幅度最大，为275倍，而β-Bi2O3的SERS增强幅度为223倍。β-Bi2O3中O2缺陷向MB的电荷转移机制可能是SERS的主要原因。这已经用PL结果中的能量弛豫解释了。从结果可以看出，掺杂剂的固有性质对SERS增强有很大影响。

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Study on the effect of transition metal (TM = Cr, Fe, Co, Ni, Cu) doping on microwave synthesised β-Bi2O3 Nanoparticles: morphology, photoluminescence and Raman Characteristics

Bi₂O₃ is an important semiconductor that has been used in various applications due to its variable bandgap and excellent biocompatibility. In this study β-Bi₂O₃ was synthesised using a microwave assisted solid-solid combustion method. Doping Bi₂O₃ with transition metal ions (i.e. Cr, Fe, Co, Ni, Cu), and its effect on morphology photoluminescence (PL) and surface enhanced Raman spectroscopy (SERS) was studied. All the synthesised materials are characterised using scanning electron microscopy, energy dispersive x-ray spectroscopy, x-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, UV-visible absorption and x-ray photoelectron spectroscopy. The dopant metals showed an effect on the morphology and optical properties of the synthesied β-Bi₂O₃. All doped and pure Bi₂O₃ tends to show SERS enhancement for methylene blue (MB) to a minimum loading of 100 ppm in the order β-Bi₂O₃-Cr>β-Bi₂O₃-Fe>β-Bi₂O₃>β-Bi₂O₃-Ni>β-Bi₂O₃-Co>β-Bi₂O₃-Cu. The highest SERS enhancement was that of β-Bi₂O₃-Cr of 275 fold where as β-Bi₂O₃ showed an enhancement of 223 fold. The charge transfer (CT) from O₂ defects in β-Bi₂O₃ to MB mechanism seems to be responsible for the observed SERS. This has been explained using the energy relaxations in the PL results. It may be interpreted from the results that the intrinsic nature of the dopant has a great influence on the SERS enhancement.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.