View article

Volatile organic compounds (VOCs) are categorized as a major group of indoor air pollutants with several adverse health effects on humans. Photocatalytic oxidation (PCO) is a promising in-situ air purification technology for removing indoor VOCs. However, the PCO application by using TiO₂ photocatalyst is hindered at high humidity and under visible light irradiation. A facile hydrothermal treatment was used to fabricate biphasic anatase-brookite iron-doped TiO₂ with different Fe contents (0.2–4 atomic%) to enhance photoactivity of TiO₂ under visible and UV light irradiations. Surface fluorination was then applied to reduce the surface hydrophilicity of Fe–TiO₂ photocatalyst with the optimum Fe content (FeTi-0.4%). Surface fluorination of FeTi-0.4% moderates the surface hydrophilicity to repel water molecules from adsorption. The performance of developed photocatalysts was studied toward degradation of …