Dy-doped MoO3 nanobelts synthesized via hydrothermal route: Influence of Dy contents on the structural, morphological and optical properties
| Autor: | Sapan Kumar Sen, Mongur Hossain, M. N. Hossain, Lincoln Paik, M.S. Manir, Supria Dutta, Tapash Chandra Paul |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Dopant Mechanical Engineering Doping Metals and Alloys Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Hydrothermal circulation 0104 chemical sciences Field emission microscopy Mechanics of Materials Materials Chemistry Orthorhombic crystal system Diffuse reflection Crystallite Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 876:160070 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2021.160070 |
| Popis: | 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 µm 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect