Mild synthetic routes to high-surface zinc oxide nanopowders

Marc Estruga, Concepción Domingo, José A. Ayllón

Research output: Contribution to journalArticleResearchpeer-review

11 Citations (Scopus)

Abstract

ZnO nanostructured powders have been prepared at low temperature and atmospheric pressure by thermal decomposition of solid precursors. Two alternative methods have been explored by using: (i) commercial zinc acetate dihydrate and (ii) a solid mixture obtained after the evaporation of a solution of zinc acetate in aqueous ammonia at 90 °C. Powder X-ray diffraction characterization shows that in both cases crystalline ZnO was obtained after precursor treatment at 90°C over 150 h. According to attenuated total reflection Fourier transform infrared analysis, powders obtained by both routes retain a small percentage of adsorbed acetate. Elemental analysis proves that almost 98 wt.-% of acetate was removed during the low-temperature treatment. Low-temperature nitrogen adsorption-desorption characterization shows the existence of two types of pores: intra-aggregate mesopores and interaggregate macropores. The specific surface area reached a value of 35 m2 g -1 for materials obtained following the direct route (i) and increased to 60 m2 g-1 for powders obtained by the ammonia route (ii). TEM characterization confirms the presence of a hierarchical pore structure as a result of the formation of sub-micrometric porous aggregates (50-200 nm.) composed of nanocrystals smaller than 20 nm. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA,.
Original languageEnglish
Pages (from-to)1649-1654
JournalEuropean Journal of Inorganic Chemistry
Issue number11
DOIs
Publication statusPublished - 1 Apr 2010

Keywords

  • Mesoporous materials
  • Nanoparticles
  • Semiconductors
  • Synthesis design
  • Zinc

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