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

Dalaver H. Anjum, Nasir K. Memon, Suk Ho Chung

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    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.

    Original languageEnglish
    Pages (from-to)134-138
    Number of pages5
    JournalMaterials Letters
    Volume108
    DOIs
    Publication statusPublished - 24 Jul 2013

      Fingerprint

    Keywords

    • Carbon-coating
    • Electron microscopy
    • Flame synthesis
    • Nanoparticles
    • Optical materials and properties
    • TiO

    ASJC Scopus subject areas

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

    Cite this