Comment on “Molten Salt Synthesis of Bi₂WO₆ Powders and its Visible-Light Photocatalytic Activity” in Materials Research. 2019; 22(5): e20190311

Abstract

Recently, Dai et al. published a paper in Research Materials 2019; 22(5): e20190311. They have investigated the visible-light photocatalytic activity of the synthesized Bi₂WO₆ powders¹. In the context of determining of band gap energy based on diffuse reflectance measurements, the cited authors make some mistakes, which are clarified in the present letter.

Keywords:
Diffuse Reflectance Spectroscopy; Kubelka-Munk function; Absorption coefficient