Investigating the growth mechanism and optical properties of carbon-coated titanium dioxide nanoparticles

Dalaver H. Anjum, Nasir Memon, Suk Ho Chung

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

TiO2 nanoparticles (NPs) were prepared using flame synthesis and then characterized using transmission electron microscopy. We found that the flame method yields both crystalline TiO2 and amorphous TiO 2 NPs. TEM analysis revealed that only the crystalline TiO 2 NPs were coated with carbon. Based on this observation, we proposed a growth model for the diffusion and precipitation of carbon atoms in TiO 2 NPs. The optical properties of TiO2 NPs were investigated by performing valence electron energy loss spectrometry analysis. We observed that carbon-coated TiO2 NPs have higher absorption in the visible range due to their lower band-gap energy. © 2013 Elsevier B.V.
Original languageEnglish (US)
Pages (from-to)134-138
Number of pages5
JournalMaterials Letters
Volume108
DOIs
StatePublished - Oct 2013

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)
  • Mechanical Engineering
  • Condensed Matter Physics

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