Presentation Information
[8a-P04-8]Green Synthesis Silica-based Copper Oxide Composite (CuO-SiO2) from Sugarcane Bagasse Ash for Photocatalytic Degradation of Toxic Dye in Industrial Wastewater
Md. Suman Islam1, Md. Sakib Ahmed1, 〇(PC)Abdul A Kuddus2, Shinichiro Mouri2, Samia Tabassum3, Abu Bakar Md. Ismail1 (1.Univ. of Rajshahi, 2.Ritsumeikan Univ., 3.BCSIR, Bangladesh)
Keywords:
Silica Composite,Sugarcane Bagasse,Photocatalytic Degradation
Nano-sized mesoporous silica is a promising material for textile wastewater treatment and as a support for photocatalysts. Conventional synthesis relies on costly precursors like TEOS and surfactants, limiting scalability. In this study, a surfactant-free, microwave-assisted alkali fusion method was used to synthesize high-purity silica nanoparticles (92.44 wt%) and CuO-SiO2 composites from sugarcane bagasse ash (SCBA), a low-cost agricultural waste. The silica exhibited a surface area of 365.93 m2/g, a pore diameter of 71.95 angstroms, and a Si:O atomic ratio of 0.50. FTIR confirmed key silica bonds and Cu–O bonds in the composite. SEM and EDAX analyses showed rough, sheet-like morphology with well-dispersed CuO. Photocatalytic tests using methylene blue showed dye removal efficiencies of 36.48 percent in the dark and 51.5 percent under UV exposure for 30 minutes, highlighting the composite’s potential in wastewater remediation.