Remarkable photocatalytic degradation of Remazol Brilliant Blue R dye using bio-photocatalyst “nano-hydroxyapatite”

Nanostructured bio-photocatalyst hydroxyapatite (HAp) was synthesized by a simple and productive wet chemical precipitation method to explore the photocatalytic performance of the material for degradation of Remazol Brilliant Blue R (RBBR) dye. The as synthesized nano-HAp was characterized through X-ray diffraction, scanning electron microscope, N2-adsorption–desorption, thermo gravimetric analyzer, Fourier transform infrared and UV-Vis absorption techniques. Photocatalytic degradation of RBBR under ultraviolet irradiation was examined and ~ 80 % degradation was achieved in 120 minutes by using nano-HAp. The photocatalytic degradation followed Parabolic Diffusion kinetics. Fast degradation kinetics and removal of RBBR dye was achieved by nano-HAP due to modification of surface entities leading to suppression of photo-generated electron-hole recombination. This makes nano-HAp a remarkable bio-photocatalyst material for removing dyes from water.