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.