Electrochemical performance and photocatalytic activity of LaOCl: Eu~(3+): its application in tin sensing and dye degradation

摘要

A series of europium doped lanthanum oxychloride samples were prepared through solid state methodwhich were utilized as an electrode material and also as photocatalyst. The compounds form tetragonalphase having P4/nmm space group (No. 129). The sample’s energy band-gap vary in between 4.14 and4.35 eV. With a carbon paste electrode in a 0.1 M KOH electrolyte, Cyclic Voltammetry (CV) andElectrochemical (AC) Impedance Spectroscopy are performed. Results reveal that the sample synthesizedcan be an electrode material for sensing tin in alkaline medium in the concentration range of 1 to5 mM. Also, the samples are considered to be photocatalyst for the decolourization of Rhodamine.B (Rh.B) dye in aqueous medium concentration of 10 ppm using UV light irradiation. LaOCl:Eu3+ sample ascatalyst be able to degrade the Rh.B dye to an extent of 90 in 60 mins. These results demonstrated therelevance of synthesized compound for sensor and photocatalytic applications.