A. Naveen Kumar^1,, N. Basavaraju^2,, C.R. Ravikumar^2,*,, V.G. Dileepkumar^3,4,, R. Ramesh^5, and H.C. Ananda Murthy^6,*,

¹Department of Physics, South East Asian College of Engineering and Technology (Affiliated to Visvesvaraya Technological University), Bangalore-560049, India

²Department of Science, East West Institute of Technology (Affiliated to Visvesvaraya Technological University), Bangalore-560091, India

³Department of Chemistry, HKBK College of Engineering Bangalore-560045, India

⁴Department of Chemistry, PES University, BSK 3rd Stage, Bangalore-560085, India

⁵Department of Chemical Engineering, School of Mechanical, Chemical and Materials Engineering, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia

⁶Department of Physical and Chemical Sciences, School of Science, Sri Sathya Sai University for Human Excellence, Sri Sathya Sai Grama, Chikkaballapur-562101, Karnataka, India

*Corresponding author: E-mail: ravicr128@gmail.com

This study reported the influence of La₁₀Si₆O₂₇:Eu³⁺ nanophosphor prepared by solution combustion method by using oxalyl dihydrazide as fuel on the electrochemical performance in HCl used as an electrolyte. The structural morphology of the nanoparticles was characterized by PXRD, it confirms pure hexagonal oxyapatite phase with the crystallite size averaging between 20-30 nm. To examine the electrochemical behaviour of the nanophosphor in an acidic medium, both electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques were utilized. For the electrochemical analysis used in this study, a modified carbon paste electrode (CPE) with the nanophosphor was utilized as the working electrode, which is an excellent sense of the paracetamol and sildenafil citrate (viagra). Further, the synthesized La₁₀Si₆O₂₇:Eu³⁺ nanophosphor exhibited improved photocatalytic mobility (PCM) and enhanced photostability when exposed to UV light during the decomposition process of direct green dye. These findings suggest that the developed material holds great promise as a potential sensor and photocatalyst.

Nanophosphor, Photocatalytic activity, Carbon paste electrode, Direct green dye, Sensor.