Synthesis of Zn doped black TiO2 nanoparticles for degradation of 2, 4, 6 tri-chloro-phenol under visible light

Abstract

A modified sol-gel method was used for synthesis of zinc doped black TiO2 nanoparticles. The modified sol-gel synthesised catalyst was utilised for degradation of 2, 4, 6 tri-chloro-phenol under visible light irradiation. The catalyst was characterized using XRD, SEM, TEM, BET and DRS analysis. The nanoparticles were crystalline in nature and in anatase phase. The size of zinc doped black TiO2 nanoparticles was 5 nm. The synthesised nanoparticles were mesoporous in nature and the specific surface area was found to be 34.15 m2/g. The band gap energy of zinc black TiO2 nanoparticles was found to be 2.73 eV. The point of zero charge of zinc doped black TiO2 nanoparticles was 6.7. The maximum degradation of 2, 4, 6 tri-chloro-phenol using 2 mol% zinc doped black TiO2 was found to be 95%.