The improved Photocatalytic Performance of Strontium Titanate (STO) Powder Induced by Lanthanum Dopants

Iriani, Yofentina; Puspita, Novia; Sandi, Dianisa; Nurosyid, Fahru; Suryana, Risa; Fasquelle, Didier

doi:10.22068/ijmse.3645

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‎ 10.22068/ijmse.3645

The improved Photocatalytic Performance of Strontium Titanate (STO) Powder Induced by Lanthanum Dopants

Yofentina Iriani

Abstract: (1104 Views)

In this research, Lanthanum (La)-doped Strontium Titanate (STO) with the formula of Sr_1-xLa_xT_iO₃ (LSTO; x=0, 0.03, 0.05, and 0.07) powders have been successfully fabricated by co-precipitation route. The impacts of La³⁺on the structural, microstructure, band-gap, and photocatalytic activity for the degradation of organic pollutants, in this case, methylene blue, under UV exposure, were reported in detail. The formation of undoped and La-doped STO samples with cubic perovskite structures was confirmed by X-ray Diffraction (XRD) results. The presence of La doping affected the microstructure morphology by producing LSTO powders with a larger specific surface area. Besides, the UV absorption of the LSTO powders was enhanced due to the narrowed band gap caused by La³⁺ dopants. Accordingly, an improvement in photocatalytic activity applied for the photodegradation of methylene blue solution was exhibited by the LSTO samples.

Keywords: lanthanum-doped strontium titanate, photocatalyst, photodegradation, methylene blue