Department of Textile Engineering, Amirkabir University of Technology, Functional Fibrous Structures & Environmental Enhancement (FFSEE), Tehran, Iran
An innovative TiO2/iron oxide/Ag nanoparticles with crystal size of about 25 nm was synthesized on polyester fabric to achieve different multi-features including super-paramagnetism, antibacterial and enhanced self-cleaning properties. Treatment temperature was varied at boil and 130°C, creating TiO2/magnetite/silver and TiO2/hematite/silver nanoparticles, respectively. The alkaline hydrolysis of polyester surface was accompanied by the nanoparticles synthesis, which forms more active surface for nanoparticles adsorption. The co-operation of iron oxide and silver nanoparticles on TiO2 surface synergistically improved the self-cleaning efficiency of titanium dioxide nanoparticles by separation of electron-hole pairs, three and four times for fabrics treated with TiO2/Fe3O4/silver and TiO2/α-Fe2O3/silver nanoparticles, respectively comparing with their corresponding control samples. Moreover, both TiO2/iron oxide/Ag nanoparticles treated samples indicated antibacterial efficiency of ≥99.99% against Staphylococcus aureus bacteria. Findings suggested that the developed magneto, bio and photo activities could be idealized depending on the end use of the treated fabrics through incorporation of different iron oxides in the prepared nanoparticles; magnetite providing the highest saturation magnetization and hematite the best self-cleaning towards degradation of Methylene Blue under sunlight irradiation.