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All Journal Journal of Multidisciplinary Applied Natural Science
Dianisa Khoirum Sandi
Study Program of Energy Conversion Engineering, Department of Mechanical Engineering, Semarang State Polytechnic, Semarang-50221 (Indonesia)
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics

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Structural, Morphological, and Optical Properties and Photocatalytic Performance of Pr (3%) and Al Co-doped SrTiO3 for Dye Removal Yuniar Sindy Mutiara Putri; Dianisa Khoirum Sandi; Fahru Nurosyid; Risa Suryana; Yofentina Iriani
Journal of Multidisciplinary Applied Natural Science Vol. 6 No. 3 (2026): Journal of Multidisciplinary Applied Natural Science
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.443

Abstract

Strontium titanate (SrTiO₃) photocatalysts co-doped with praseodymium (Pr) and aluminum (Al) were successfully synthesized using the coprecipitation method. The doping concentrations were varied with a fixed Pr content of 3 mol% and Al contents of 1, 3, and 5 mol%. The samples were characterized using X-ray diffraction (XRD), Fourier-transform infrared (FTIR), surface area analyzer (SAA), scanning electron microscopy with energy-dispersive X-ray (SEM–EDX), and UV–visible diffuse reflectance spectroscopy (UV–Vis DRS). The photocatalytic behavior of the prepared samples was evaluated by degrading methylene blue (MB) under UV C light (λ = 254 nm) exposure for 1–5 h. XRD analysis confirmed the formation of a cubic perovskite structure with the presence of Sr–O–Ti bonds identified in the FTIR spectra at about 557 cm⁻¹. Increasing the Al doping concentration resulted in larger crystallite sizes, higher crystallinity, and a reduction in the bandgap energy from 3.188 eV to 3.085 eV. SEM–EDX and SAA analyses showed an increase in particle size accompanied by a decrease in surface area. The bandgap narrowing enhanced photon absorption and improved photocatalytic activity toward the degradation of methylene blue. Overall, Pr–Al co-doping effectively modified the structural and optical properties of SrTiO₃, making it a promising material for efficient photocatalytic applications.
Co-Authors Fahru Nurosyid Risa Suryana Yofentina Iriani Yuniar Sindy Mutiara Putri