Visible light activity of Bi2WO6@ TCNQ with coreshell structure in phenol degradation

摘要

Bi2WO6@TCNQ visible light photocatalyst with a core-shell structure was synthesized by adsorption methods. The core-shell structure results in the fast transfer of photogenerated carriers, reduced carrier recombination and photogenerated holes on the HOMO level of TCNQ can be injected into the VB of Bi2WO6 under visible light irradiation, resulting in the direct oxidation of organic pollutants. The photocatalytic activity of Bi2WO6@TCNQ was gradually enhanced with an increasing proportion of TCNQ. When the mass fraction of TCNQ reaches 0.5%, it exhibits the highest visible light activity. The apparent rate constant k of Bi2WO6@TCNQ-0.5% is almost 2.2 times as high as that of pure Bi2WO6.