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

doi:10.1016/j.chemosphere.2017.05.022

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Resources Management > Periodical Articles > Item 310902800/31617

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/31617

Title:	Degradation of gaseous formaldehyde via visible light photocatalysis using multi-element doped titania nanoparticles
Authors:	Laciste, Maricris T. de Luna, Mark Daniel G. Tolosa, Nolan C. Lu, Ming-Chun
Contributors:	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
Keywords:	TiO2 doping Visible-light photocatalysis Gaseous formaldehyde Air purification Multi-element
Date:	2017-09
Issue Date:	2018-11-30 15:50:24 (UTC+8)
Publisher:	Pergamon-Elsevier Science Ltd
Abstract:	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.
Relation:	Chemosphere, v.182, pp.174-182
Appears in Collections:	[Dept. of Environmental Resources Management] Periodical Articles

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