AI Article Synopsis
- The study investigates the synthesis of LaVO4: Dy3+ nanorods using a solvothermal method, with a focus on varying pH levels in an ethanol-water solution.
- Characterization techniques like X-ray diffraction and electron microscopy reveal a phase transition and a shift from irregular nanoparticles to one-dimensional nanorods as pH increases.
- The nanorods show a decrease in band gap energy and exhibit strong yellow and blue emissions, indicating promising optical properties for potential applications.
Article Abstract
Using La2O3, Dy2O3, NH4VO3, HNO3 as materials, solvothermal synthesis method was adopted to prepare LaVO4 : Dy3+ nanorods through adjusting the pH values of ethanol-water mixing solution. The as-prepared samples were characterized by X-ray diffraction, transmission electron microscope, infrared spectrum, UV-Vis absorption spectra and fluorescence spectra. The results show that the phase transition from m- to t -LaVO4 : Dy3+ can be found when the pH value changes from 2 to 4. With the increase of the pH value of the mixing solution, the grain size of the sample becomes smaller and the shape of LaVO4 : Dy3+ crystal changes from irregular nanoparticle to one dimension nanorod. Besides, the band gap of the sample decrease from 3.68 (pH 2) to 3.43 eV (pH 10). It is found from FL that the excitation spectra of LaVO4 : Dy3+ nanorods have a little red shift in comparison with irregular nanoparticle. Furthermore, the LaVO4 : Dy3+ nanorod exhibits the strongest yellow emission (4F9/2-6 H13/2) and blue emission(4F9/2-6H15/2), and it possesses the largest Y/B value (1.039).
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Lanthanide vanadate-based trimodal probes for near-infrared luminescent bioimaging, high-field magnetic resonance imaging, and X-ray computed tomography.
J Colloid Interface Sci
September 2023
Instituto de Ciencia de Materiales de Sevilla (CSIC-US), c/Américo Vespucio, 49, 41092 Sevilla, Spain. Electronic address:
We have developed a trimodal bioimaging probe for near-infrared luminescent imaging, high-field magnetic resonance imaging, and X-ray computed tomography using Dy as the paramagnetic component and Nd as the luminescent cation, both of them incorporated in a vanadate matrix. Among different essayed architectures (single phase and core-shell nanoparticles) the one showing the best luminescent properties is that consisting of uniform DyVO nanoparticles coated with a first uniform layer of LaVO and a second layer of Nddoped LaVO. The magnetic relaxivity (r) at high field (9.
View Article and Find Full Text PDF[Solvothermal synthesis and optical properties of LiVO4 : Dy3+ nanorod].
Guang Pu Xue Yu Guang Pu Fen Xi
December 2012
College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Article Synopsis
- The study investigates the synthesis of LaVO4: Dy3+ nanorods using a solvothermal method, with a focus on varying pH levels in an ethanol-water solution.
- Characterization techniques like X-ray diffraction and electron microscopy reveal a phase transition and a shift from irregular nanoparticles to one-dimensional nanorods as pH increases.
- The nanorods show a decrease in band gap energy and exhibit strong yellow and blue emissions, indicating promising optical properties for potential applications.
Hydrothermal synthesis, dimension evolution and luminescence properties of tetragonal LaVO4:Ln (Ln = Eu3+, Dy3+, Sm3+) nanocrystals.
Dalton Trans
November 2011
Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, P. R. China.
Well-defined 1D and 3D t-LaVO(4):Ln (Ln = Eu(3+), Dy(3+), Sm(3+)) nanocrystals with regular and uniform shapes were synthesized through a simple hydrothermal route assisted by disodium ethylenediaminetetraacetic acid (Na(2)EDTA). X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), as well as kinetic decay curves were employed to characterize the samples. The results show that the reaction time, pH value of the initial solution, and Na(2)EDTA/La(3+) molar ratio all have an important influence on the dimension and shapes of the final products.
View Article and Find Full Text PDFColloidal nanoparticles of Ln3+-doped LaVO4: energy transfer to visible- and near-infrared-emitting lanthanide ions.
Langmuir
July 2005
Laboratories of Supramolecular Chemistry and Technology & MESA Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Colloidal, organic solvent-soluble Ln3+-doped LaVO4 nanoparticles have been synthesized by a precipitation reaction in the presence of (C18H37O)2PS2- as ligand, that coordinates to the surface of the nanoparticles. The materials are well soluble in chlorinated solvent such as chloroform. Energy transfer of excited vanadate groups has been observed for Ln3+ ions that emit in the visible and the near-infrared (Eu3+, Tm3+, Nd3+, Er3+, Ho3+, Dy3+, Sm3+, Pr3+), thus making it a very generic sensitization mechanism.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!