Preparation of ZnO nanoparticles by thermal decomposition of zinc alginate

Sotirios Baskoutas, Panayotis Giabouranis, Spyros N. Yannopoulos, Vassilios Dracopoulos, Lajos Toth, Athanassios Chrissanthopoulos, Nikolaos Bouropoulos

Research output: Article

87 Citations (Scopus)


A new method to produce zinc oxide nanocrystals is presented. The method is based on the thermal decomposition of zinc alginate gels. The gels were produced in the form of beads by ionic gelation between a zinc solution and sodium alginate. The wet beads were heated at 800 and 450 °C for 24 h and the products were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission electron microscopy (TEM) and micro-Raman spectroscopy. XRD analysis showed that all obtained samples are of wurtzite structure. TEM analysis combined with electron diffraction also showed the presence of single crystals indexed as ZnO hexagonal phase. Crystal size was determined by measuring individual crystals from SEM pictures. It was found that heating temperature and the kind of zinc agent influence the crystal size. Raman scattering revealed the existence of defects in the structure of nanoparticles whose cringing was discussed in the context of recent studies in this field.

Original languageEnglish
Pages (from-to)8461-8464
Number of pages4
JournalThin Solid Films
Issue number24 SPEC. ISS.
Publication statusPublished - okt. 15 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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    Baskoutas, S., Giabouranis, P., Yannopoulos, S. N., Dracopoulos, V., Toth, L., Chrissanthopoulos, A., & Bouropoulos, N. (2007). Preparation of ZnO nanoparticles by thermal decomposition of zinc alginate. Thin Solid Films, 515(24 SPEC. ISS.), 8461-8464.