Photocatalytic decomposition of benzene by UV illumination with the presence of nano-TiO₂
by Nguyen Thi Hue; Dinh Thi Thuy Hang
International Journal of Nanotechnology (IJNT), Vol. 10, No. 3/4, 2013

Abstract: Anatase-TiO₂ has been successfully coated on the surface of quartz cotton (SiO₂) and alumina fibre (Al₂O₃) by the sol-gel method. The thickness of single layer of TiO₂/SiO₂ is 1 µm, while that of TiO₂/Al₂O₃ is 300 nm. The TiO₂ crystals are fine with the diameter varied from 20 to 25 nm. The TiO₂ crystalline structure is defined by XRD method, and the thickness of the coatings by either XRD or SEM one. Benzene with the concentration of 0.44mg/m³ can be totally decomposed by TiO₂/SiO₂ and in about 85% by TiO₂/Al₂O₃ after 8 hours; by increasing UV light (to 40W), the benzene can be completely decomposed after 4.5 hours by TiO₂/SiO₂ and after 6 hours by TiO₂/Al₂O₃. Thus, TiO₂/SiO₂ and TiO₂/Al₂O₃ are good materials for fabricating filters to treat hazardous substances in air environment.

Online publication date: Fri, 05-Apr-2013

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