Controllable synthesis and characterization of porous FeVO4nanorods and nanoparticles

Abstract

In this paper, we report on the shape-controlled synthesis of porous FeVO₄ nanorods and nanoparticles through a facile route, including hydrothermal synthesis of FeVO₄·1.1H₂O precursors and sequential post-calcination at 550 °C for 24 h. The porous FeVO₄ nanorods and nanoparticles were obtained with reactant concentrations of 0.3 and 0.02 mol L⁻¹, respectively. The Rietveld refined XRD, SEM and TEM/HRTEM characterization shows that the porous FeVO₄ nanorods and nanoparticles have a triclinic crystal structure, while the average diameter of the porous FeVO₄ nanorods is about 100 nm and the size of the porous nanoparticles is in the range of 80–150 nm. N₂ adsorption–desorption isotherms show that both the porous FeVO₄ nanorods and nanoparticles exhibit mesoporous structures with specific surface areas of 6.7 and 9.7 m² g⁻¹, respectively.