Photocatalytic Degradation of Eosin Yellow Dye by Ti doped NiO Nanoparticles and their Antibacterial Activity
摘要
Nickel oxide (NiO) and Titanium doped NiO nanoparticles (NPs) were prepared via co-precipitation method. The successful doping of Ti to the NiO and undoped NiO NPs were confirmed by powerful characterization techniques such as SEM, EDX, FTIR, XRD and UV–visible spectroscopy. SEM indicated that NiO NPs has irregularly spherical shaped particles while Ti doped NiO NPs has pore interceded texture and more agglomerated. EDX shows the elemental composition of both NPs. The XRD analysis demonstrates the crystalline structure of NiO having size of52.34 nm while Ti doped NiO NPs have55.11 nm. FTIR peaks confirmed better preparation of both NPs in the range from 1000–500 cm−1. The optical band gap of NiO is 3.6 eV while Ti doped NiO has 3.3 eV. After 75 min of irradiation time, photocatalytic degradation studies under UV irradiation showed 96 and 84% Eosin yellow (EY) dye degradation by Ti doped NiO and undoped NiO NPs, at (UV power = 15 W, Catalyst dose = 0.006 g, Dye concentration = 45 ppm and pH = 7) respectively. Further parameters were also performed for photodegradation of EY dye like effect of catalyst dosage, dye concentration, pH and activity of recycled catalysts. Additionally, the kinetic study demonstrates that EY dye degradation study was significantly obey Pseudo-first order kinetics as compared to Pseudo-second order kinetics. Furthermore antibacterial activity of NiO and Ti doped NiO NPs were also identified.