preparation and study of photocatalytic hydrophobic surface-modified tio2 coatings in degradation of e. coli and various azo dyes

In this research, tio2 nanoparticles were synthesized by sol-gel method and coated on the tile by using the doctor blade method. the tio2 hydrophobic coatings were prepared by applying oleic acid and an organic binder on the tile substrate. the xrd, fesem, contact angle, and ft-ir analyses characterized the manufactured coatings. according to the xrd pattern, the synthesized nanoparticles have good crystallinity, and two anatase and rutile phases have formed. the contact angle analysis showed that the contact angle increased by surface modification by using oleic acid. the antibacterial and photocatalytic activity of the coatings were evaluated in the decomposition of escherichia coli in various concentrations of bacteria and various dyes. the results confirmed the good antibacterial and photocatalytic activity of tio2 coatings. the stability and durability of the coatings were examined by applying the salt spray test, shore d test, and ultrasonic bath. the coatings revealed good anti-corrosion properties, and the hydrophobicity of the coatings was preserved after the salt spray test.