title: Photocatalytic performance of electrospun CNT/TiO2nanofibers in a simulated air purifier under visible light irradiation.
abstract: The photocatalytic treatment of gaseous benzene under visible light irradiation was developed using electrospun carbon nanotube/titanium dioxide (CNT/TiO2) nanofibers as visible light active photocatalysts. The CNT/TiO2nanofibers were fabricated by electrospinning CNT/poly(vinyl pyrrolidone) (PVP) solution followed by the removal of PVP by calcination at 450 °C. The molar ratio of CNT/TiO2was fixed at 0.05:1 by weight, and the quantity of CNT/TiO2loaded in PVP solution varied between 30 and 60 % wt. CNT/TiO2nanofibers have high specific surface area (116 m2/g), significantly higher than that of TiO2nanofibers (44 m2/g). The photocatalytic performance of the CNT/TiO2nanofibers was investigated by decolorization of 1 × 10-5M methylene blue (MB) dye (in water solution) and degradation of 100 ppm gaseous benzene under visible light irradiation. The 50-CNT/TiO2nanofibers (calcined CNT/TiO2nanofibers fabricated from a spinning solution of 50 % wt CNT/TiO2based on PVP) had higher MB degradation efficiency (58 %) than did other CNT/TiO2nanofibers and pristine TiO2nanofibers (15 %) under visible light irradiation. The photocatalytic degradation of gaseous benzene under visible light irradiation on filters made of 50-CNT/TiO2nanofibers was carried out in a simulated air purifier system. Similar to MB results, the degradation efficiency of gaseous benzene by 50-CNT/TiO2nanofibers (52 %) was higher than by other CNT/TiO2nanofibers and pristine TiO2nanofibers (18 %). The synergistic effects of the larger surface area and lower band gap energy of CNT/TiO2nanofibers were presented as strong adsorption ability and greater visible light adsorption. The CNT/TiO2nanofiber prepared in this study has potential for use in air purifiers to improve air treatment efficiency with less energy.
authors: The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, 126 Prachauthit Rd., Bangmod, Thungkru, Bangkok, 10140, Thailand.|Centre of Excellence on Energy Technology and Environment, Science and Technology Postgraduate Education and Research Development Office, Bangkok, Thailand.
authors: Mathana
authors: M
authors: Wongaree
authors: Division of Environmental Technology, School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, 126 Prachauthit Rd., Bangmod, Thungkru, Bangkok, 10140, Thailand. siriluk.chi@kmutt.ac.th.|Nanotec-KMUTT Center of Excellence on Hybrid Nanomaterials for Alternative Energy, King Mongkut's University of Technology Thonburi, 126 Prachauthit Rd., Bangmod, Thungkru, Bangkok, 10140, Thailand. siriluk.chi@kmutt.ac.th.
authors: Siriluk
authors: S
authors: Chiarakorn
authors: The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, 126 Prachauthit Rd., Bangmod, Thungkru, Bangkok, 10140, Thailand.|Centre of Excellence on Energy Technology and Environment, Science and Technology Postgraduate Education and Research Development Office, Bangkok, Thailand.
authors: Surawut
authors: S
authors: Chuangchote
authors: Department of Fundamental Energy Science, Graduate School of Energy Science, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan.
authors: Takashi
authors: T
authors: Sagawa
mesh_terms: D000327:Adsorption; D061808:Air Filters; D000393:Air Pollutants / Q000032:analysis*; D001554:Benzene / Q000032:analysis*; D002384:Catalysis; D008027:Light; D008751:Methylene Blue / Q000032:analysis; D057139:Nanofibers / Q000737:chemistry* / Q000528:radiation effects; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D000393:Air Pollutants; D037742:Nanotubes, Carbon; C009495:titanium dioxide; D014025:Titanium; D001554:Benzene; D008751:Methylene Blue
keywords: Carbon nanotube/titanium dioxide nanofibers; Electrospinning; Methylene blue; Photocatalysis; Poly(vinyl pyrrolidone); Simulated air purifier; Visible light irradiation