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Research Article Open Access
Cooking oil fumes (COFs) deteriorate indoor air quality. Therefore, in this study, a nanostructured TiO2 core–porous polyaniline shell (TP) nanocomposite was developed for vapor-phase photocatalytic degradation of volatile organic compounds (VOCs) from COFs. A PANI shell coated uniformly on the surface of the TiO2 core was prepared through a double–surfactant-assisted polymerization method. The PANI shell thickness, morphology characterizations and specific surface area were controlled by altering the weight ratio of aniline monomer to TiO2 (AT ratio). Under the illumination of ultraviolet-visible light, the TP nanocomposite exhibited higher photocatalytic activity than did pure TiO2 because of the charge-separation and charge-transfer processes from TiO2 to PANI shell as well as the high specific surface area induced by the reduced aggregation states of the TiO2 nanoparticles. Under the characteristic AT ratio of 2.5, The TP nanocomposite containing the nanoporous PANI shell that was coated on the TiO2 nanoparticle core continuously treated the COFs, demonstrating a VOC removal efficiency of approximately 80% and mineralization efficiency of approximately 46 %; the thermal tolerance was as high as 125°C.
cooking oil fumes, indoor air, VOCs, photocatalytic oxidation, polyaniline, TiO2, Plant sciences and Environmental sciences