Article ID Journal Published Year Pages File Type
728533 Materials Science in Semiconductor Processing 2014 11 Pages PDF
Abstract

This work focuses on the improvement of the photocatalytic activity of mesoporous-assembled In2O3–TiO2 mixed oxide photocatalysts for Congo Red (CR) azo dye degradation by varying the In2O3-to-TiO2 molar ratio and calcination temperature. All of photocatalysts are synthesized by a sol–gel process with the aid of a structure-directing surfactant. The results show that the incorporation of In2O3 to the mesoporous-assembled TiO2 can increase the specific surface area and total pore volume, inhibit the anatase-to-rutile phase transformation, and decrease the crystallite size of the resulting In2O3–TiO2 mixed oxide photocatalysts. The mesoporous-assembled 0.05In2O3–0.95TiO2 mixed oxide photocatalyst with an In2O3-to-TiO2 molar ratio of 0.05:0.95 (5 mol% In2O3 incorporation) and calcined at 500 °C exhibits the highest CR dye degradation activity (with reaction rate constant of 0.86 h−1), being considerably higher than that of the commercial P-25 TiO2 powder.

Related Topics
Physical Sciences and Engineering Engineering Electrical and Electronic Engineering
Authors
, , ,