Improvement of TiO₂/LDPE Composite Films for Photocatalytic Oxidation of Acetone

Abstract:

Titanium dioxide with coupling agent (ETES) was applied as a photocatalyst for a synthesis of the TiO₂/LDPE composite film. The physical properties of TiO₂/LDPE composite film were analyzed by a Scanning Electron Microscope (SEM). TiO₂ particles were impregnated into the polymer matrix film as a LDPE composite film. The results from the X-ray Diffraction (XRD) technique revealed that the structure of TiO₂/LDPE composite film were anatase crystalline. The chemical structure of the TiO₂/ LDPE composite films were analyzed by an ATR-Fourier transforms infrared (ATR-FTIR) spectrometer. Wavenumber of FTIR spectra at 719 cm¹ indicated the Ti-O-Ti bond. Band gap energies of the films ranged from 3.19-3.29 eV. The photocatalytic activity of the film was tested for removal of gaseous acetone in a closed chamber. Experimental conditions were set as follows: a UV light intensity of approximately 2.7 mW.cm^-2, flow rate of 2 L.min^-1, and an initial acetone concentration of about 435±20 ppm. While the catalyst dosage was varied from 3% to 15% (wt. cat/wt. film).The degradation rate of acetone increased when increasing dosage of TiO₂ from 3% to 10%, then decreased a little bit when increasing the dosage to 15%. The TiO₂/LDPE composite film at the dosage of 10% yielded the highest removal efficiency of 75%, followed by the film at the dosage of 15%, 5%, and 3%, respectively.

• Periodical: Advanced Materials Research (Volumes 931-932)
• Pages: 235-240
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.931-932.235
• Online since: May 2014
• Authors: Kowit Suwannahong, Sanya Sirivithayapakorn, Pongsak Noophan, Wipada Sanongraj*
• Keywords: Acetone, Indoor Air Pollution, Photocatalytic Oxidation, TiO₂/LDPE Composite Film

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