Abstract
The present work reports the synthesis of LaxNd1−xVO4 where x = 0, 0.05, 0.10 and 0.15 by a solution based co-precipitation method at pH = 12 calcined at 650 °C in nanoparticle form. The novelty of the present work is preparation and various applications of targeted materials by using a traditional liquid-based technique at room temperature without use of any surfactants. The structural, morphological, optical and luminescent properties of as-obtained compositions were characterized by various techniques such as powder X-ray diffraction (PXRD) followed by Rietveld refinement, high-resolution transmission electron microscopy (HRTEM) with selected area electron diffraction (SAED), ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy and photoluminescence spectroscopy. The PXRD diffraction patterns confirmed tetragonal structure with crystallite size ranging between 22 and 35 nm for all four compositions. The PXRD results are further validated by Rietveld refinement method with low values of profile parameters. HRTEM supplemented with SAED analysis revealed that with a change in doping concentration, there is a change in morphology from rod-shaped to porous hexagonal-shaped features. The optical band gap values are found to be in the range of wide-band semiconductors (2–4 eV). The dielectric properties of as-prepared La-doped NdVO4 nanoparticles were investigated. The dielectric constant is low in x = 0.0 composition, whereas it increases with an increase in La3+ concentration.
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The data sets generated and analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors express their sincere thanks and gratitude to the Sophisticated Test and Instrumentation Centre (STIC), Cochin University, for providing the facilities of powder X-ray diffraction (PXRD), high-resolution transmission electron microscopy supplemented with selected area electron diffraction (HRTEM–SAED) and Fourier transform infrared (FTIR) spectrophotometer. The corresponding author also acknowledges the Research & Seed Grant given to the CGMR laboratory by University of Jammu under the Head Quality Assurance Fund (DIQA), RUSA 2.0 and PURSE grants.
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All the authors contributed toward studying this problem. Material preparation, data collection and analyses were performed by Monika and Bindu Raina. Mitesh Solanki and Bharat Parekh contributed to the X-ray diffraction and Rietveld analysis. The first draft of the manuscript was written by Monika. Prof. K.K. Bamzai supervised and conceived the problem. All the authors read and approved this manuscript.
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Sharma, M., Raina, B., Solanki, M. et al. Impact of rare earth (La3+) doping on structural, morphological, optical and dielectric properties of NdVO4 nanoparticles. Indian J Phys (2023). https://doi.org/10.1007/s12648-023-03009-y
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DOI: https://doi.org/10.1007/s12648-023-03009-y