Ag@Bi₂WO₆Composites with High Visible‐Light‐Driven Photocatalytic Activities Prepared in UV Light Irradiation

Abstract

Bi 2 WO 6 microstructures were synthesized through hydrothermal process and Ag@Bi 2 WO 6 composites were synthesized by simple UV light irradiation for 5 min using Bi 2 WO 6 and AgNO 3 as raw materials. Ag@Bi 2 WO 6 composites were characterized by X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and UV-Vis absorption spectrum (UV-Vis). Few Ag deposited on the Bi 2 WO 6 leads to an increase in photocatalytic activity, which clearly indicates that the recombination of photogenerated charge carrier between the hybrid orbital of Bi6s and O2p (valence band) to the empty W5d orbital is inhibited greatly in the Ag@Bi 2 WO 6 composite. In addition, a few H 2 O 2 will greatly enhance photocatalytic activity of Ag@Bi 2 WO 6 , and the proper reason is discussed.

Preparation of Ag-loaded octahedral Bi2WO6 photocatalyst and its photocatalytic activity

“…recombination rate of photogenerated electron hole pairs recently [13][14][15]. One useful approach is to dec orate Bi 2 WO 6 with Ag nanoparticles [16]. The Ag nanoparticles can effectively transfer the photogener ated electrons generated from the Bi 2 WO 6 , reducing the recombination of electron hole pairs and increas ing photon efficiency [17,18].…”

Controllable Synthesis and Photocatalytic Activity of Ba_0.6Mg_0.4TiO₃ Particles with Different Morphologies

“…It absorbs only the ultraviolet light (λ ≤ 386.5 nm) which only accounts for about 4.0% of the sunlight. In order to improve the efficiency of the sunlight utilization, the development of photocatalysts with high activity under a wide range of visible light is highly desirable [9][10][11][12][13].…”