Degradation of gaseous formaldehyde via visible light photocatalysis using multi-element doped titania nanoparticles

doi:10.1016/j.chemosphere.2017.05.022

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標題:	Degradation of gaseous formaldehyde via visible light photocatalysis using multi-element doped titania nanoparticles
作者:	Laciste, Maricris T. de Luna, Mark Daniel G. Tolosa, Nolan C. Lu, Ming-Chun
貢獻者:	Univ Philippines, Coll Engn, Environm Engn Unit Dept Environm & Nat Resources, Environm Management Bur, Div Res & Dev Univ Philippines, Dept Chem Engn Malayan Colleges Laguna, Off Res Promot & Coordinat, Cabuyao 4025, Laguna, Philippines Chia Nan Univ Pharm & Sci, Dept Environm Resources Management
關鍵字:	TiO2 doping Visible-light photocatalysis Gaseous formaldehyde Air purification Multi-element
日期:	2017-09
上傳時間:	2018-11-30 15:50:24 (UTC+8)
出版者:	Pergamon-Elsevier Science Ltd
摘要:	This study developed a modified titanium dioxide photocatalyst doped with multi-element synthesized via sol-gel process to productize a novel photocatalyst. The study includes degradation of gaseous formaldehyde under visible light using the synthesized novel titanium dioxide photocatalyst. Varying molar ratios from 0 to 2 percent (%(mole) in titanium dioxide) of ammonium fluoride, silver nitrate and sodium tungstate as dopant precursors for nitrogen, fluorine, silver and tungsten were used. Photo degradation of gaseous formaldehyde was examined on glass tubular reactors illuminated with blue light emitting diodes (LEDs) using immobilized photocatalyst. The photocatalytic yield is analyzed based on the photocatalyst surface chemical properties via X-ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared (FTIR) Spectrophotometry, Brunauer-Emmett-Teller (BET) and X-ray Diffraction (XRD) characterization results. The applied modifications enhanced the visible light capability of the catalyst in comparison to the undoped catalyst and commercially available Degussa P-25, such that it photo catalytically degrades 88.1% of formaldehyde in 120 min. Synthesized titanium dioxide photocatalyst exhibits a unique spin orbital at 532.07 eV and 533.27 eV that came from the hybridization of unoccupied Ti d(t(2g)) levels. (C) 2017 Elsevier Ltd. All rights reserved.
關聯:	Chemosphere, v.182, pp.174-182
显示于类别:	[環境資源管理系(所)] 期刊論文

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