Civil Engineering

Yofentina Iriani1This email address is being protected from spambots. You need JavaScript enabled to view it., Dianisa Khoirum Sandi2, Firda Reza Agustina1, Laili Uswatun Hasanah1, Fahru Nurosyid1, and Didier Fasquelle3

1Department of Physics, Faculty of Mathematics and Sciences, Universitas Sebelas Maret, Surakarta, 57126, Indonesia

2Study Program of Energy Conversion Engineering, Department of Mechanical Engineering, Politeknik Negeri Semarang, Semarang, 50275, Indonesia

3Department of Unitede Dynamique et Structure des Materiaux Moleculaires, Universite du Littoral-Cote d’Opale, CS 80699 F-62228 Calais, France

 

Received: September 24, 2025
Accepted: December 10, 2025
Publication Date: January 26, 2026

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.6180/jase.202608_31.001  


Strontium Titanate ( SrTiO3 or STO ) is a perovskite semiconductor extensively studied for photocatalytic applications, particularly in methylene blue (MB) degradation from wastewater. Its photocatalytic performance can be enhanced by site-specific doping either at the A-site ( Sr ) and/or B-site (Ti) of the perovskite lattice. Here, pure, Ni-doped, and Nd-doped STO photocatalysts (SrTi1−xNixO3 and Sr1−xNdxTiO3;x = 0.05) were successfully fabricated via the coprecipitation technique. Structural, vibrational, and optical properties were characterized by X-ray diffraction (XRD), Fourier Transform infrared (FTIR), UV-Vis diffuse reflectance spectra (DRS), and UV-Vis spectroscopy instruments. The cubic SrTiO3 perovskite phase was achieved in all samples, where both Ni and Nd doping enlarged the crystallite sizes of STO. The success of photocatalyst formation was also confirmed by emerging FTIR spectra at about 570 cm−1, corresponding to Sr-Ti-O vibrations. DRS analysis revealed a bandgap of 3.23 eV for STO, which widened to 3.55 eV upon Ni doping, while Nd doping narrowed it slightly to


Keywords: Coprecipitation method; methylene blue degradation; Ni-doped and Nd-doped Strontium Titanate; Photocatalyst; Photocatalytic activity.


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