Photocatalytic performance of silver-modified TiO2 embedded in poly(ethyl-acrylate-co-methyl metacrylate) matrix

详细信息    查看全文

• 作者：ágnes Veres (1)
  Judit Ménesi (1)
  ádám Juhász (2)
  Ottó Berkesi (1)
  Nóra ábrahám (3)
  Gabriella Bohus (3)
  Albert Oszkó (1)
  Gábor Pótári (1)
  Norbert Buzás (4)
  László Janovák (1)
  Imre Dékány (3) (5)
  
• 关键词：TiO2 ; Silver ; Plasmonic ; Photocatalyst ; Polymer ; Nanocomposite ; Contact angle
• 刊名：Colloid & Polymer Science
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：292
• 期：1
• 页码：207-217
• 全文大小：676 KB
• 作者单位：ágnes Veres (1)
  Judit Ménesi (1)
  ádám Juhász (2)
  Ottó Berkesi (1)
  Nóra ábrahám (3)
  Gabriella Bohus (3)
  Albert Oszkó (1)
  Gábor Pótári (1)
  Norbert Buzás (4)
  László Janovák (1)
  Imre Dékány (3) (5)
  
  1. Department of Physical Chemistry and Materials Science, University of Szeged, 1. Aradi Vt, H-6720, Szeged, Hungary
  2. Nanocolltech Ltd., 9/b Gogol St, H-6722, Szeged, Hungary
  3. Supramolecular and Nanostructured Materials Research Group of Hungarian Academy of Scieneces, University of Szeged, Aradi Vt.1, H-6720, Szeged, Hungary
  4. Research Development and Innovation Office, University of Szeged, 13. Dugonics sq, H-6720, Szeged, Hungary
  5. Department of Medical Chemistry, University of Szeged, Dóm square 8., H-6720, Szeged, Hungary
  
• ISSN：1435-1536

文摘

The plasmonic Ag-TiO2 (with 0.5?wt% Ag) photocatalyst was prepared on P25 TiO2 surface. The presence of AgNPs on the titania was indicated by the UV–vis spectrum, which showed a plasmonic absorbance band in the visible range (λ max--55?nm). XPS measurements suggested that Ag was in metallic (Ag) and in oxide forms on TiO2. Ag-TiO2 photocatalyst and TiO2 were embedded in [poly(ethyl acrylate-co-methyl methacrylate; p(EA-co-MMA)] copolymer to attain mechanically stable, photocatalytically active nanocomposite films. The photooxidation of ethanol was slower on the photocatalyst/polymer nanocomposites, but it could be significantly improved by irradiating them with UV light. The photoaging was applied as a post-preparation treatment to improve the photocatalytic activity of the nanocomposite films. Changed surface morphology and the partial destruction of the polymer were supported by AFM and FTIR results. Contact angle measurements were used to determine the surface free energies of the prepared and the photoaged nanocomposite films.