en Research Paper Research Paper <span style="font-size:11pt"><span style="line-height:200%"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times="">In this study, we thoroughly examine &beta;-Bi₂O₃ thin films as potential photocatalysts. We produced these films using an environmentally friendly Sol Gel method that is also cost-effective. Our research focuses on how different precursor concentrations, ranging from 0.1 M to 0.4 M, affect the photocatalytic performance of these films. We conducted a comprehensive set of tests to analyze various aspects of the films, including their structure, morphology, topography, optical properties, wettability, and photocatalytic capabilities. These tests provided us with a well-rounded understanding of the films&#39; characteristics. To assess their photocatalytic efficiency, we used Methylene Blue (MB) as a contaminant and found that the films, particularly those with a 0.1 M concentration, achieved an impressive 99.9% degradation of MB within four hours. The 0.1 M film had a crystalline size of 39.7 nm, an indirect band gap of 2.99 eV, and a contact angle of 51.37&deg;. Our findings suggest that &beta;-Bi₂O₃ films, especially the 0.1 M variant, have promising potential for treating effluents from complex industrial dye processes. This research marks a significant step in utilizing sustainable materials to address pollution and environmental remediation challenges.</span></span></span></span></span></span> Bismuth oxide,Dip coating,photocatalysis,Thin Films,Wettability 103 118 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-5247-1&slc_lang=en&sid=1 Hella Houda hoda.hella@univ-biskra.dz 1800319475328460019021 1800319475328460019021 No Physics Laboratory of Thin Layers and Applications, Biskra University, BP 145 RP, Biskra 07000, Algeria Guettaf Temam Elhachmi elhachemi.guettaf@univ-biskra.dz 1800319475328460019022 1800319475328460019022 No Physics Laboratory of Thin Layers and Applications, Biskra University, BP 145 RP, Biskra 07000, Algeria Hachemi Ben Temam h.bentemam@univ-biskra.dz 1800319475328460019023 1800319475328460019023 No Physics Laboratory of Thin Layers and Applications, Biskra University, BP 145 RP, Biskra 07000, Algeria Saâd RAHMANE s.rahmane@univ-biskra.dz 1800319475328460019024 1800319475328460019024 No Physics Laboratory of Thin Layers and Applications, Biskra University, BP 145 RP, Biskra 07000, Algeria Mohammed Althamthami mohammednasser132@gmail.com 1800319475328460019025 1800319475328460019025 Yes Physics Laboratory of Thin Layers and Applications, Biskra University, BP 145 RP, Biskra 07000, Algeria