Eu₅VO₁₀: Synthesis Methods and Characterization of Basic Physicochemical Properties.

Area of Science:

• Materials Science
• Inorganic Chemistry
• Solid State Chemistry

Background:

• Rare-earth vanadates are functional materials with applications in luminescence, optoelectronics, and catalysis.
• Existing literature data on europium(III) vanadate(V) (Eu5VO10) is incomplete regarding its synthesis, structure, and properties.

Purpose of the Study:

• To supplement missing data on the synthesis, structure, and physicochemical properties of Eu5VO10.
• To identify potential applications of Eu5VO10.

Main Methods:

• Synthesis via ceramic, mechanochemical, and modified Pechini methods.
• Characterization using X-ray Diffraction (XRD), Differential Thermal Analysis-Thermogravimetric Analysis (DTA-TG), Fourier-Transform Infrared Spectroscopy (FTIR), UV-Visible Diffuse Reflectance Spectroscopy (UV-Vis-DRS), Scanning Electron Microscopy (SEM), and gas pycnometry.

Main Results:

• Eu5VO10 crystallizes in the monoclinic system.
• Thermal stability up to approximately 1310 °C.
• Wide-bandgap semiconductor properties with an estimated energy gap (Eg) between ~3.21 eV and ~3.53 eV.
• Synthesis method influences crystallite size.

Conclusions:

• The study successfully synthesized and characterized Eu5VO10, filling critical literature gaps.
• Eu5VO10 exhibits promising properties as a wide-bandgap semiconductor.
• Further development of synthesis methods and characterization enhances understanding and potential applications of rare-earth vanadates.