Sulphated TiO₂ Reduced by Ammonia and Hydrogen as an Excellent Photocatalyst for Bacteria Inactivation.

ABSTRACT: This study presents a relatively low-cost method for modifying TiO₂-based materials for photocatalytic bacterial inactivation. The photocatalytic inactivation of Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus epidermidis) bacteria using modified sulphated TiO₂ was studied. The modification focused on the reduction of TiO₂ by ammonia agents and hydrogen at 400-450 °C. The results showed a high impact of sulphate species on the inactivation of E. coli. The presence of these species generated acid sites on TiO₂, which shifted the pH of the reacted titania slurry solution to lower values, around 4.6. At such a low pH, TiO₂ was positively charged. The ammonia solution caused the removal of sulphate s

SUBMITTER: Rychtowski P 

PROVIDER: S-EPMC10779939 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature