Degradation of pollutant and antibacterial activity of waterborne polyurethane/doped TiO₂ nanoparticle hybrid films

Abstract

The waterborne polyurethane/doped TiO₂ nanoparticle hybrid films were prepared. Nd, I doped TiO₂ was prepared with a 50 nm particle size firstly. The hybrid film was prepared by mixing doped TiO₂ with waterborne polyurethane, followed by heat treatment. The presence and nanometric distribution of doped TiO₂ nanoparticles in prepared membranes is evident according to SEM images. The photocatalytic activities of doped TiO₂ were significantly enhanced compared with pure TiO₂ powders. After the hybrid film fabrication, the photocatalytic activities were almost the same as the pure catalysts with k _MB of 0.046. In the antibacterial testing, the hybrid films can inhibit E. coli growth. A significant decrease in membrane fluidity and increase of permeability of E. coli were observed.

Keywords

doped TiO₂ / polyurethane / hybrid film / photocatalytic activity / antibacterial

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