CO2 utilization for fast preparation of nanocrystalline hydrozincite


Turianicova E., Kanuchova M., Zorkovska A., Holub M., Bujnakova Z., Dutkova E., ...More

JOURNAL OF CO2 UTILIZATION, vol.16, pp.328-335, 2016 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 16
  • Publication Date: 2016
  • Doi Number: 10.1016/j.jcou.2016.08.007
  • Title of Journal : JOURNAL OF CO2 UTILIZATION
  • Page Numbers: pp.328-335

Abstract

In this study, gaseous CO2, solid ZnO and liquid H2O were converted to nanocrystalline (13 nm) hydrozincite, i.e. Zn-5(CO3)(2)(OH)(6) via fast one-step mechanochemical process at ambient temperature and pressure. The mechanically induced conversion of the three-phase mixture, studied by X-ray diffraction analysis, Fourier-transform infrared and X-ray photoelectron spectroscopies, completed in 10 min. X-ray diffraction and Fourier-transform infrared spectroscopy indicated the presence of disorder in the crystal structure of mechanosynthesized hydrozincite The physico-chemical properties of the mechanosynthesized hydrozincite, characterized in the view of surface and optical properties, were compared with the commercial hydrozincite. It was found that the Brunauer-Emmett-Teller surface area was almost 2 times higher (56.7 m(2)/g) than the corresponding value of the commercial material, which is related to the smaller particle size (similar to 230 nm). Both the ultraviolet-visible absorption and photoluminescence emission spectra recorded for the mechanosynthesized hydrozincite indicated size effect. The weight loss (26.5%) obtained during thermal decomposition of the mechanosynthesized material is close to the theoretical weight loss value of hydrozincite. (C) 2016 Elsevier Ltd. All rights reserved.