Barium Oxide Microparticles: Computational Bibliometrics and Experiments on Synthesis, Optical Properties, and Application in Degradation Indigotin Dye

This research aims to analyze the optical properties and photocatalytic application potential in degrading indigotin dye using barium oxide (BaO) microparticles, which were synthesized using a simple and cheap method via the co -precipitation method from various concentrations of Ba(NO3)2 and NaHCO3 precursors. The synthesized BaO was then characterized using a digital microscope to analyze the surface and absorption spectroscopy to analyze the optical properties by calculating the energy band gap of the material. The results showed that the BaO microparticles that were successfully synthesized were obtained from a combination of various Ba(NO3)2:NaHCO3 precursors. Characterization from a digital microscope and absorption spectroscopy showed BaO microparticles have a particle size ranging of 0.04-0.07, 0.03-0.09, and 0.09-0.19 mm with energy band gap of 4.290, 4.360, and 4.382 eV for each ratio of 1:1, 1:2, and 1:4, respectively. This study only evaluated the photocatalytic activity of 1:2 ratio BaO microparticles on Indigotin degradation reached up to 48% for 120 minutes. BaO microparticles were successfully synthesized using a simple processing method and the band gap energy (Eg) was calculated. They showed good photocatalysis application potential in degrading indigotin dye.