| Summary: | In this study, self-cleaning polyester (PET) fabrics were prepared using TiOF<sub>2</sub> and hexadecyltrimethoxysilane(HDS) treatment. TiOF<sub>2</sub> was synthesized via direct fluorination of a precursor TiO<sub>2</sub> at various reaction temperatures. The prepared PET fabrics had superior photocatalytic self-cleaning properties compared with anatase TiO<sub>2</sub>/HDS-treated PET fabrics under UV and sunlight with 98% decomposition of methylene blue. TiOF<sub>2</sub>/HDS-treated PET fabrics also had superior superhydrophobic self-cleaning properties compared with anatase TiO<sub>2</sub>/HDS-treated PET fabrics with a 161° water contact angle and 6° roll-off angle. After the self-cleaning tests of the non-dyed TiOF<sub>2</sub>/HDS-treated PET fabrics, we prepared dyed TiOF<sub>2</sub>/HDS-treated PET fabrics to test practical aspects of the treatment method. These PET fabrics were barely stained by tomato ketchup; even when stained, they could be self-cleaned within 4 h. These results suggest that practical self-cleaning PET fabrics with superhydrophobicity and photocatalytic degradation could be prepared using TiOF<sub>2</sub>/HDS-treatment.
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