Size-tunable fabrication of BiFeO3 nanoparticles with enhanced visible-light photocatalytic activity using a facile co-precipitation method

Abstract:

BiFeO 3 nanoparticles with controlled particle size were synthesized via a facile co-precipitation method. The samples were characterized by x-ray powder diffraction, transmission electron microscopy, atomic force microscopy and UV–vis diffuse reflectance spectroscopy. By controlling the timing of base addition during the co-precipitation process the particle size can be controlled easily. It was found that longer base addition times, ie slower dropping rates, resulted in smaller particle sizes exhibiting narrower band gaps. The smallest BiFeO 3 particles prepared by this method are best described as circular flake-like nanoparticles with a diameter of 10–20 nm and a height of approximately 2.5–7 nm. To the best of our knowledge, these particles are the smallest BiFeO 3 particles ever prepared by a co-precipitation method. Furthermore, our synthetic protocol allows the facile synthesis of size-tunable, pure-phase …

Año de publicación:

2019

Keywords:

Fuente:

google