Comparative study on the electrochemical properties of bismuth vanadate (BiVO4) nanoparticles synthesized via green and chemical methods
摘要
The synthesis process significantly influences the morphology and electrochemical properties of electrode materials, and the potential for sustainable alternatives is assessed by comparing their electrochemical properties. BiVO4 nanoparticles were synthesized using both the environmentally friendly green method of flaxseed (Linum usitatissimum) extract and conventional chemical methods; hexamethylenetetramine (HMTA) was used as a surfactant. Both samples exhibited a monoclinic scheelite phase in XRD analysis, with average crystallite sizes of 13.96 nm (green) and 15.94 nm (chemical). In the FESEM images, irregular spherical morphology was observed in green synthesis. The specific capacitance of the green-synthesized BiVO4 nanoparticles was 2366.24 F/g at 3 A/g, which was higher than that of the chemically synthesized BiVO4 at the same current density, which was 1273 F/g. Cyclic stability and excellent capacitance retention of 89.43% were obtained over 5000 cycles of charge–discharge curves of the green-synthesized BiVO4 are a potential electrode material for energy storage devices.