One‐step solvothermal synthesis of hollow Bi₂WO₆ photocatalyst

Abstract

A one‐step solvothermal synthesis of hollow microspherical Bi2WO6 nanophotocatalyst was carried out for the first time under the collective action of potassium chloride (KCl) and polyvinylpyrrolidone (PVP). The physicochemical properties such as crystal structure, morphology, specific surface area, and optical properties of the material were characterized by means of XRD, SEM, EDS, UV‐vis, and BET. The effect of KCl and PVP on the morphology control of the product is discussed. Rhodamine B dye in wastewater was used as model pollutant, and the effect of hollow microspherical morphology on photocatalytic activity is discussed. The results presented here provide a simple, effective, and widely applicable approach for the rapid synthesis of special morphology Bi2WO6 by a one‐step method.

Synthesis of “walnut‐like” BiOCl/Br solid solution photocatalyst by electrostatic self‐assembly method

“…[8][9][10] A lot of literatures have shown that doping of nonmetallic elements such as F, Br, I, C, N, and S can effectively enhance the photocatalytic performance of BiOCl semiconductors. [11][12][13][14][15][16][17] Solid solution photocatalyst is different from simple element doping, which forms a new impurity energy level to reduce the bandgap. The solid solution photocatalyst reduces the band gap by designing the electronic structure of photocatalyst, that is, to adjust the position of valence band or conduction band.…”