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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Dy-doped MoO3 nanobelts synthesized via hydrothermal route: Influence of Dy contents on the structural, morphological and optical properties
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Dy-doped MoO3 nanobelts synthesized via hydrothermal route: Influence of Dy contents on the structural, morphological and optical properties

机译：通过水热途径合成的掺杂MOO3纳米核：镝内容物对结构，形态和光学性质的影响

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This experimental work reports undoped and Dy-doped MoO3 nanobelts with different doping concentrations (1, 2, 3, 4 M%) synthesized via hydrothermal route. The influence of Dy dopant contents on structural, morphological, elemental, functional and optical properties of MoO3 nanobelts was investigated by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray (EDX) analysis, Fourier transform infrared spectroscopy (FTIR) and UV-Vis-NIR diffuse reflectance spectrophotometer (DRS), respectively. The XRD results supported by FTIR spectra revealed that both types of undoped and Dy-doped MoO3 consist of a combination of orthorhombic and hexagonal phases and all samples are polycrystalline. The randomly oriented nanobelt-like morphology with an average length of 2.023-2.599 mu m and average width ranges from 140 nm to 189 nm for undoped MoO3 was identified from FESEM micrographs. Interestingly, no visible change was observed in morphology due to Dy incorporation in pure MoO3 nanobelts. The comparative studies of various structural parameters (i.e. crystallite size, dislocation density, and lattice strain) were evaluated using Debye-Scherrer (D-S) and Williamson-Hall (W-H) formulae. The existence of different functional groups combining both hexagonal and orthorhombic structures of undoped and doped samples was identified which implied the peak intensities and wavenumbers were found to vary slightly. The DRS spectra revealed that optical bandgap increases from 2.95 eV to 3.05 eV up to 3 M% Dy doping and there after decreased to 2.86 eV for 4 M%. This report highlights a noteworthy impact of Dy3+ ions doping on the microstructural, morphological and optical characteristics of MoO3 nanobelts. (C) 2021 Elsevier B.V. All rights reserved.
机译：本实验报告了通过水热法合成的具有不同掺杂浓度（1,2,3,4 M%）的未掺杂和Dy掺杂MoO3纳米带。采用X射线衍射（XRD）、场发射扫描电镜（FESEM）、能散X射线（EDX）、傅里叶变换红外光谱（FTIR）和紫外-可见红外漫反射分光光度计（DRS）研究了掺钕含量对MoO3纳米带结构、形态、元素、功能和光学性能的影响。FTIR光谱支持的XRD结果表明，未掺杂和掺Dy的MoO3均由正交相和六方相组成，所有样品均为多晶。FESEM显微照片显示，未掺杂MoO3的平均长度为2.023-2.599μm，平均宽度为140-189 nm，呈随机取向的纳米带状形貌。有趣的是，由于Dy掺入纯MoO3纳米带，在形貌上没有观察到明显的变化。使用Debye Scherrer（D-S）和Williamson Hall（W-H）公式对各种结构参数（即晶粒尺寸、位错密度和晶格应变）进行了比较研究。发现未掺杂和掺杂样品中存在结合六方和正交结构的不同官能团，这意味着峰值强度和波数略有不同。DRS光谱显示，掺Dy 3 M%时，光学带隙从2.95 eV增加到3.05 eV，然后在4 M%时下降到2.86 eV。本报告强调了Dy3+离子掺杂对MoO3纳米带的微观结构、形态和光学特性的显著影响。（c）2021爱思唯尔B.V.保留所有权利。

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