Low-temperature synthesis of AMoO4 (A = Ba, Ca, Co, Ni) by steam treatment of acetylacetonate and ethyl acetoacetate complexes

Yoshito Iida, Yohei Sato, Ryohei Hayami, Akihisa Aimi, Kazuki Yamamoto, Takahiro Gunji

Research output: Contribution to journalArticlepeer-review

Abstract

Acetylacetonate and ethyl acetoacetate metal complexes for single sources can be transformed into metal oxides, hydroxides, and carbonates upon exposure to water vapor at low temperatures (<120 °C). In this work, we prepared molybdenum-based composite oxides and reported the reaction behavior of molybdenum diacetylacetonate dioxide (MoO2(acac)2) and metallo-organic complexes of barium, calcium, nickel, and cobalt by steam treatment. BaMoO4 and CaMoO4 were obtained from Ba–Mo mix and Ca–Mo mix by steam treatment at 70 and 90 °C. For infrared spectroscopy, the steam-treated Ba–Mo mix and Ca–Mo mix at 90 °C were indicated dissociation of organic ligand completely, while the steam-treated Ba–Mo mix and Ca–Mo mix 70 °C showed in the presence of organic components. Therefore, the purity of steam-treated Ba–Mo mix and Ca–Mo mix was influenced by steam-treated temperature. In contrast, steam-treated Co–Mo mix and Ni–Mo mix could not be transformed to CoMoO4 and NiMoO4, respectively. When these steam-treated products were heated at 600 °C, they formed composite oxides. Thin films of steam-treated Ba–Mo mix and Ca–Mo mix were prepared. These films showed photoluminescence. [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)576-583
Number of pages8
JournalJournal of Sol-Gel Science and Technology
Volume103
Issue number2
DOIs
Publication statusPublished - Aug 2022

Keywords

  • Complex oxides
  • Ethyl acetoacetate complex
  • Photoluminescence
  • Sol–gel processes
  • Steam treatment

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