A sol-gel synthesis and gas-sensing properties of finely dispersed ZrTiO4

The transparent titanium-zirconium-containing gel was obtained using heteroligand coordination compounds (namely, alkoxoacetylacetonates) as the precursors. The high-dispersive system “ZrTiO4 – carbon” formed after drying of such gel and carbonization of the obtained xerogel, was used to study the evolution of microstructure for the product (ZrTiO4) during thermal treatment in air for 1 h in the temperature range from 500 °C to 1000°С. It was stated that the formation of crystalline phase occurred in the narrow range 690-730°С. The thermal treatment at 500 °C and 600°С allowed obtaining micro- and mesoporous X-ray amorphous products of the composition ZrTiO4, with the specific surface area falling in the range 82–150 m2/g. At the higher temperatures the single-phase nanocrystalline powder was prepared (the specific surface area amounted to 2.5–15 m2/g). Particle coarsening took place more extensively at temperatures ≥700°С was shown. For the ZrTiO4 nanopowder crystallized under the mildest conditions at the temperature of 700 °C, chemoresistive gas-sensitive properties were studied for the first time. The material showed a high reproducible response at 1–20% O2 and 200–10,000 ppm H2 at a relatively low detection operating temperature of 450 °C. © 2019 Elsevier B.V.

Simonenko E.P.1 , Simonenko N.P.1 , Kopitsa G.P.2, 3 , Mokrushin A.S.1 , Khamova T.V.3 , Sizova S.V.4 , Khaddazh M. 5 , Tsvigun N.V.6 , Pipich V.7 , Gorshkova Y.E.8 , Sevastyanov V.G.1 , Kuznetsov N.T.1
Elsevier Ltd
  • 1 Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninsky pr., 31, Moscow, 119991, Russian Federation
  • 2 Konstantinov Petersburg Nuclear Physics Institute NRC KI, Orlova Roscha, Gatchina, Leningrad district188300, Russian Federation
  • 3 Grebenshchikov Institute of Silicate Chemistry of the Russian Academy of Sciences, Adm. Makarova emb., 2, St. Petersburg, 199155, Russian Federation
  • 4 Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya str., 16/10, Moscow, 117997, Russian Federation
  • 5 Peoples’ Friendship University of Russia, Scientific Educational Center “Nanotechnology”, Miklukho-Maklaya str. 10/2, Moscow, 117198, Russian Federation
  • 6 Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences, Leninsky pr., 59, Moscow, 119333, Russian Federation
  • 7 Jülich Centre for Neutron Science, Forschungszentrum Jülich GmbH, Outstation at MLZ, Jülich, 52425, Germany
  • 8 Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research Dubna, Moscow district52425, Russian Federation
Ceramics; Gas sensor; Nanostructures; Sol-gel processes; ZrTiO4
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