{"title":"Photocatalytic Oxidation of Gaseous Formaldehyde Using the TiO2 Coated SF Filter","authors":"Janjira Triped, Wipada Sanongraj, Wipawee Khamwichit","volume":89,"journal":"International Journal of Environmental and Ecological Engineering","pagesStart":454,"pagesEnd":458,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9998535","abstract":"
The research work covered in this study includes the morphological structure and optical properties of TiO2<\/sub>-coated silk fibroin (SF) filters at 2.5% wt. TiO2<\/sub>\/vol. PVA solution. SEM micrographs revealed the fibrous morphology of the TiO2<\/sub>-coated SF filters. An average diameter of the SF fiber was estimated to be approximately 10µm. Also, it was confirmed that TiO2<\/sub> can be adhered more on SF filter surface at higher TiO2<\/sub> dosages. The activity of semiconductor materials was studied by UV-VIS spectrophotometer method. The spectral data recorded shows the strong cut off at 390 nm. The calculated band-gap energy was about 3.19 eV. The photocatalytic activity of the filter was tested for gaseous formaldehyde removal in a modeling room with the total volume of 2.66 m3<\/sup>. The highest removal efficiency (54.72 ± 1.75%) was obtained at the initial formaldehyde concentration of about 5.00 ± 0.50ppm.<\/p>\r\n","references":"[1]\tU. S. EPA, \"Health and Environmental Effects Profile for Formaldehyde,\u201d EPA\/600\/x-85\/362. Environmental Criteria and Assessment Office, Office of Health and Environmental Assessment, Office of Research and Development, Cincinnati, OH, 1988.\r\n[2]\tU. S. EPA, \"Characterizing air emissions from indoor sources,\u201d EPA report: EPA\/600\/F- 95\/005, US Environmental Protection Agency, Washington, DC, 1995.\r\n[3]\tW. F. Jardim, R.M. Alberici, \"Photocatalytic destruction of VOCs in the gasphase using titanium dioxide,\u201d Appl. Catal. B: Environ. vol.14, 1997, pp. 55\u201368. \r\n[4]\tJ. Zhao, X.D. Yang, \"Photocatalytic oxidation for indoor air purification a literature review,\u201d Build. Environ. vol.38, 2003, pp. 645\u2013 654. \r\n[5]\tZ. Lexuan, H. Fariborz, B Partice, K. Janusz, \"Modeling and physical interpretation of photocatalytic oxidation efficiency in indoor air applications,\u201d Build. Environ., vol. 45, 2010, pp. 2689-2697.\r\n[6]\tJ. Shang, W. Li, Y. F. Zhu, \"Structure and photocatalytic characteristics of TiO2 film photocatalyst coated on stainless steel web net,\u201d. Molecular Catalysis A: Chem. J, vol. 202, 2003, pp.187\u2013195. \r\n[7]\tZ. Liu, Y. Quan, X. H. B., Fu. et al., \"Effect of embedded-silica on microstructure and photocatalytic activity of titania prepared by ultrasound-assisted hydrolysis,\u201d Appl. \tCatalysis B: Environ., vol. 52, 2004, pp.33\u201340.\r\n[8]\tB. Pierre-Alexandre, P. Eric, P. Laure, S. France, C Delphine,. D. Emmanuel, B. C\u00b4 edric, G. Chantal, \"Characterization of a new photocatalytic textile for formaldehyde removal from indoor air,\u201d Appl. Catalysis B, Environ., 2010. \r\n[9]\tY. Z. Wang, D. J. Blasioli,, H. J. Kim,, H. S. Kim,, D. L. Kaplan, \"Cartilage tissue engineering with silks caffolds and human articular chondrocytes,\u201d Biomaterials, vol.27, 2006, pp. 4434-4442. \r\n[10]\tZ. Jingxin,, Z. Yaopeng,, S. Huili,, H. Xuechao,, \"Electrospinning and rheology of regenerated Bombyx mori silk fibroin aqueous solutions: The effects of pH and concentration,\u201d Polymer, vol. 49, 2008, pp. 2880\u20132885.\r\n[11]\tX. Wang, X. Zhang, J. Castellot, , I. Ira Herman, M. Iafrati, D. L. Kaplan, \"Controlled release from multilayer silk biomaterial coatings to modulate vascular cell responses,\u201d Biomaterials, vol.29, 2008, pp. 894\u2013903. \r\n[12]\tN. Vachairoroj, J. Ratanavaraporn, S. Damrongsakkul, R. Pichyangkura,, T. Banaprasert,, S. Kanokpanont, \"A comparison of Thai silk fibroin-based and chitosan-based materials on in vitro biocompatibility for bone substitutes\u201d Int. J. Biol. Macromol. vol. 45, 2009, pp. 470\u2013477.\r\n[13]\tJ. Chamchongkaset,, S. Kanokpanont,, D.L. Kaplan, S. Damrongsakkul, \"Development of a Protein-Filled Conduit for Peripheral Nerve Regeneration\u201d Adv. Mater. Res. vol. 8, 2008, pp. 685\u2013688. \r\n[14]\tJ. Triped,, W. Sanongraj,, B. Oonkhanond, and Sanongraj, S., \"Synthesis of silk fibroin fiber for indoor air particulate removal\u201d. Int. J. of Environ. Sci and Engineer, vol. 2, (3), 2010, pp. 132\u2013137.\r\n[15]\tP. S. Shinde, S. B. Sadale, P. S. Patil, A. Bruger, S. M. Neumann, and C. H. Bhosale, \"Properties of spray deposited titanium dioxide thin films and their application in photoelectrocatalysis,\u201d Solar Energy Materials and Solar Cells. vol. 92, 2008, pp. 283\u2013290.\r\n[16]\tJ. Dharma, \"Simple method of measuring the band gap energy value of TiO2 in the powder form using a UV\/Vis\/NIR spectrometer\u201d, Perkin Elmer, 2012. \r\n[17]\tL. Andronic. and A.Duta, \"TiO2 thin films for dyes photo degradation\u201d. Thin Solid Films. vol. 55, 2007, pp. 6294\u20136297. \r\n","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 89, 2014"}