Photocatalysts Comparison of Low Mn-Doped SrTiO₃ (SrTi_1-xMn_xO₃; x=1% and 3%)

Abstract

SrTiO3, or STO, is an intriguing candidate and has been extensively studied for photocatalytic degradation because of its outstanding features. This study purposed to compare and determine the effects of low Mn doping (x= 1% and 3%) on the phase, structural property, and photocatalytic activity of Mn-doped STO (SrTi1-xMnxO3) as a photocatalyst for degrading MB dye. The synthesis performed the co-precipitation method with a sintering temperature of 1000°C for 4 h holding time. The phase and structural properties of the powder samples were characterized using X-Ray Diffraction (XRD) and Fourier Transform Infra-Red (FTIR) instruments. The XRD and FTIR data validated that all Mn-doped STO samples had been successfully fabricated. The photocatalytic activity of STO:Mn 1% and STO:Mn 3% was confirmed by Methylene Blue (MB) dye degradation under UV light. It revealed that the STO:Mn 1% showed better photocatalytic activity than STO:Mn 3%, with the highest degradation percentage of 58.01% at 6 h irradiation.