P.RAJESH SELVAN - Department of Chemistry, St. John&#۰۳۹;s College, Palayamkotti, TIRUNELVELI
PRAVEENDANIEL M - DEPARTMENT OF CHEMISTRY, ST.JOHN&#۰۳۹;S COLLEGE, PALAYMAKOTTAI

TiO۲ doped with phosphomolybdic acid composites were synthesized by the blending method. The above prepared TiO۲-phosphomolybdic acid composites were characterized by UV-visible, FT-IR, XRD, SEM and EDAX methods. Photocatalytic degradation efficiency also studied. The UV-visible spectra showed a strong peak for the base TiO۲ and doped phosphomolybdic acid and the absorption spectra indicate a decrease in band-gap energy upon doping, and with slight increase in Urbach energy. FT-IR structural features reveal the peak of TiO۲, phosphomolybdic acid and TiO۲-phosphomolybdic acid composite peaks. The XRD study proved that there was a slight decrease in the particle size in the composite materials. SEM study also showed that a decrease in particle size and uniform distribution of dopant. Heber multi lamp photo-reactor visible light irradiation of Methylene blue (MB) dye was effectively degraded. The antibacterial effect against Streptococcus mutans was examined using the disc diffusion method. This was shown to be effective against antibiotics and Streptococcus mutans.

Blending method, Methylene blue. Antimicrobial activity, Photodegradation