Photocatalytic evaluation of TiO₂/nylon systems prepared at different impregnation times

• Published in: Catalysis today Vol. 161; no. 1; pp. 15 - 22
• Main Authors: Mejía, M.I, Marín, J.M, Restrepo, G, Pulgarín, C, Kiwi, J
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 17-03-2011; Elsevier
• Subjects: Catalysis; catalytic activity; Chemistry; Colloidal gels. Colloidal sols; Colloidal state and disperse state; energy; Exact sciences and technology; fabrics; General and physical chemistry; infrared spectroscopy; irradiation; methanol; nylon; Photochemistry; photolysis; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); scanning electron microscopy; silicone; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; ultraviolet radiation; Binary compound; Nylon; Support; Alcohol; Immersion; Optical microscopy; Energy; Methanol photodegradation; Alkanol; TiO; Photochemical degradation; Methanol; Scanning electron microscopy; Photocatalysis; Transition element compounds; Impregnation time; Infrared spectrometry; Heterogeneous catalysis; Impregnation; Ultraviolet irradiation; Sol gel process; Distribution; Titanium oxide; Fabric; Environmental protection
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2010.09.005

TiO₂/nylon fabrics were investigated for methanol degradation under UV light irradiation. TiO₂ Degussa P-25 was supported on nylon by immersing the nylon in sol–gel TiO₂ and silicone. The TiO₂ layers on the nylon were explored as a function of the time of immersion, impregnation agent and the type of nylon fabric used. The energy diffuse spectroscopy (EDS) and infrared spectroscopy (ATR-FTIR) confirmed the presence of TiO₂ bonded to the nylon fabrics. Optical microscopy (OM) and scanning electron microscopy (SEM) show a more uniform distribution of TiO₂ on nylon fabrics prepared by immersion in sol–gel as compared to the silicone method. The most suitable photodegradation of gaseous methanol by TiO₂/nylon samples was obtained by sol–gel samples prepared by 24h immersion time.