Titania and titania-silver nanoparticle deposits made by Liquid Flame Spray and their functionality as photocatalyst for organic- and biofilm removal

Helmi Keskinen, Jyrki M. Mäkelä, Mikko Aromaa, Jorma Keskinen, Sami Areva, Cilâine V. Teixeira, Jarl B. Rosenholm, Viljami Pore, Mikko Ritala, Markku Leskelä, Mari Raulio, Mirja S. Salkinoja-Salonen, Erkki Levänen, Tapio Mäntylä

Research output: Contribution to journalArticleScientificpeer-review

51 Citations (Scopus)

Abstract

Titania and titania-silver nanoparticle deposits were made by Liquid Flame Spray technique, in which the liquid precursor is injected into a high temperature flame, where it will evaporate and nucleate to nanosize particles. One-step and two-step methods were used for preparation of titania-silver deposits. The amount of silver added was 1 wt%. The deposits were collected in the flame zone on steel and glass surfaces and were analyzed by TEM, EDS, XPS and SAXS. The titania deposits consisted of porous nanosized titania agglomerates of primary particles (∼10 nm). With silver addition, small spherical silver metal particles (∼ 2 nm) were detected on the agglomerates. An increase in the photocatalytic activity was verified by stearic acid decomposition and biofilm removal using Deinococcus geothermalis as the model organism. © Springer Science+Business Media, Inc. 2006.
Original languageEnglish
Pages (from-to)127-132
Number of pages6
JournalCatalysis Letters
Volume111
Issue number3-4
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

Keywords

  • Deposits
  • Liquid flame spray
  • Photocatalyst
  • Titanium dioxide

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