Patent ID: 11964258
Assignee: KING FAISAL UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A method for photodegradation of an organic dye, comprising:
dispersing zirconium doped terbium nano oxides (ZrTb2O3) in an aqueous solution including the organic dye to provide a suspension; and
subjecting the suspension to light irradiation; wherein the zirconium doped terbium nano oxides are prepared according to a method comprising:
dissolving terbium nitrate (Tb(NO3)3·6H2O) and zirconium nitrate hydrate (Zr(NO3)3·xH2O) in water to obtain a solution;
adjusting pH of the solution to about 7.5 by dropwise addition of a solution of NaHCO3;
stirring to obtain a homogenous solution containing zirconium (Zr(CO3)2·xH2O) and terbium (Tb2(CO3)3·xH2O) carbonate precipitates;
centrifuging and drying the homogenous solution to obtain Zr(CO3)2 and Tb2(CO3)3 metal carbonates;
calcinating the Zr(CO3)2 and Tb2(CO3)3 metal carbonates at a temperature of about 825° C. to about 875° C.; and
obtaining the zirconium doped terbium nano oxides (ZrTb2O3); and, wherein the nano oxides are nanoparticles having an average diameter ranging from about 17 nm to about 22 nm.