Characterization and photocatalytic activity of KSr₂Nb₅O₁₅ with tungsten bronze structure

Abstract

Tungsten bronze (TB) type potassium strontium niobate KSr₂Nb₅O₁₅ was prepared by solid-state reaction method, and was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-vis diffuse spectrum. The photocatalyst shows high photocatalytic activity of photodegrading acid red G. The effects of photocatalyst dosage and initial concentration of acid red G on the photodegradation process were studied. The kinetics of photocatalytic degradation of acid red G by KSr₂Nb₅O₁₅ catalyst follows the first order reaction.

Keywords

potassium strontium niobate / photocatalyst / solid state reaction / tungsten bronze / acid red G

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