Fabrication Of Ca Doping On CuBi₂O₄ And The Application For Enhanced Visible Light Photocatalytic Degradation Of Congo Red

The CuBi2O4 and Ca0.05Cu0.95Bi2O4,Ca0.1Cu0.90Bi2O4,and Ca0.15Cu0.95Bi2O4 microsphere were prepared by one-step simple hydrothermal method at 180? for 10 hours.All the synthesized nano particles were characterized with X-ray diffraction for studying the crystallinity and particle size of the materials.The morphology of all the synthesized materials was investigated with(FESEM).The chemical composition and elemental mapping were studied with(EDS)coupled with(FESEM).The electron hole pair recombination was studied with photo luminescence(PL)spectrophotometer.The Absorption region of all material were measured with UV-visible diffuse reflectance spectrophotometer(DRS).The composite were used in treating water contaminated by azo dye congo red under visible light irradiation.Among all the synthesized materials the Ca0.1Cu0.95Bi2O4 showed best efficiency with high degradation constant using lest time.The pure CuBi2O4 showed 46%of dye congo red degradation within 70 min of irradiation,while Ca0.1Cu0.95Bi2O4 showed 82%of photo degradation within 70 min of irradiation.Photocatalytic study of Congo red was studied under six operational parameters such as effect of dosage,initial concentration,pH,H2O2 and inorganic salts.The maximum photocatalytic activity was obtained 94%within 60 minutes of irradiation in presence of 0.6 mL of H2O2.