Detail publikace

Rare-Earth Zirconate Ln2Zr2O7 (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties

TORRES RODRÍGUEZ, J. GUTIÉRREZ CANO, V. MENELAOU, M. KAŠTYL, J. CIHLÁŘ, J. TKACHENKO, S. GONZÁLEZ, J. KALMÁR, J. FÁBIÁN, I. LÁZÁR, I. ČELKO, L. KAISER, J.

Originální název

Rare-Earth Zirconate Ln2Zr2O7 (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The physicochemical properties of rare-earth zirconates can be tuned by the rational modification of their structures and phase compositions. In the present work, La3+-, Nd3+-, Gd3+-, and Dy3+-zirconate nanostructured materials were prepared by different synthetic protocols, leading to powders, xerogels, and, for the first time, monolithic aerogels. Powders were synthesized by the co-precipitation method, while xerogels and aerogels were synthesized by the sol−gel technique, followed by ambient and supercritical drying, respectively. Their microstructures, thermogravimetric pro-files, textural properties, and Crystallographic structures are reported. The co-precipitation method led to dense powders (SBET <1 m2 g−1 ), while the sol−gel technique resulted in large surface area xerogels (SBET = 144 m2 g−1) and aerogels (SBET = 168 m2 g−1 ). In addition, the incorporation of lanthanide ions into the zirconia lattice altered the crystal structures of the powders, xerogels, and aerogels. Single-phase pyrochlores were obtained for La2Zr2O7 and Nd2Zr2O7 powders and xerogels, while defect fluorite structures formed in the case of Gd2Zr2O7 and Dy2Zr2O7. All aerogels contain a mixture of cubic and tetragonal ZrO2 phases. Thus, a direct effect is shown between the drying conditions and the resulting crystalline phases of the nanostructured rare-earth zirconates.

Klíčová slova

Rare-Earth Zirconate; Ln2Zr2O7; La; Nd; Gd; Dy; Powders; Xerogels; Aerogels

Autoři

TORRES RODRÍGUEZ, J.; GUTIÉRREZ CANO, V.; MENELAOU, M.; KAŠTYL, J.; CIHLÁŘ, J.; TKACHENKO, S.; GONZÁLEZ, J.; KALMÁR, J.; FÁBIÁN, I.; LÁZÁR, I.; ČELKO, L.; KAISER, J.

Vydáno

31. 12. 2019

Nakladatel

American Chemical Society

Místo

Washington, DC

ISSN

1520-510X

Periodikum

Inorganic Chemistry

Ročník

1

Číslo

1

Stát

Spojené státy americké

Strany od

14467

Strany do

14477

Strany počet

11

URL

http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=1&SID=F2bwkrVhawvBfdMRdQX&page=1&doc=1

BibTex

@article{BUT159363,
  author="Jorge Alberto {Torres Rodríguez} and Vanessa {Gutiérrez Cano} and Melita {Menelaou} and Jaroslav {Kaštyl} and Jaroslav {Cihlář} and Serhii {Tkachenko} and Jesús A. {González} and József {Kalmár} and István {Fábián} and István {Lázár} and Ladislav {Čelko} and Jozef {Kaiser}",
  title="Rare-Earth Zirconate Ln2Zr2O7 (Ln: La, Nd, Gd, and Dy) Powders, Xerogels, and Aerogels: Preparation, Structure, and Properties",
  journal="Inorganic Chemistry",
  year="2019",
  volume="1",
  number="1",
  pages="14467--14477",
  doi="10.1021/acs.inorgchem.9b01965",
  issn="1520-510X",
  url="http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=1&SID=F2bwkrVhawvBfdMRdQX&page=1&doc=1"
}