Antibacterial activity of titanium dioxide (Tio2)‎ doped with h2o2 against staphylococcus aureus human pathogen in aqueos solution

Abstract EN

The effects of parameters such as amount of TiO2, presence of H2O2, irradiation time, dark and light condition were studied and investigated their acted against S.aureus human pathogen in aqueous solution.

The results show that the number of S.aureus was greatly reduced after treatment with a visible light and Tio2 doping H2o2 better than after treatment with visible light only and visible light with Tio2 only.

In the treatment with Tio2 and light the number of bacteria was decreased with survival ratio at 40 %.

The best result has been obtained at 0.33 mg / ml Tio2 concentration which is equal to survival ratio 30 %.

Two dark/H2O2 treatments have been done in presence and absence of Tio2, in adding 10ppm H2o2 the bacterial number decreases (survival ratio 45 %) and in adding 0.33mg / ml of Tio2 with 10 ppm H2O2 in dark the survival ratio 40 %.

Two light / H2O2 treatments have been done in presence and absence of Tio2.

Survival ratio in presence of light / H2O2 was 23 %, the survival ratio of S.

aureus in presence of light/H2O2/Tio2 was 11 %.

This study suggests that H2o2 doped Tio2 can be used as disinfectant in water phase.