Hydrothermal synthesis of vanadate/phosphate hydroxyapatite solid solutions

Ayumu Onda*, Shuhei Ogo, Koji Kajiyoshi, Kazumichi Yanagisawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


A series of vanadate substituted hydroxyapatite was directly prepared by a simple hydrothermal method at low temperature (110-200 °C) in NaOH solutions for 14 h. The apatite samples were characterized by powder X-ray diffraction, ICP chemical analysis, nitrogen physisorption, TEM, and FTIR measurements. The vanadate/phosphate hydroxyapatite solid solution, i.e., Ca10(VO4)x(PO4)6 - x(OH)2 (xε{lunate}I = 0, 1, 2, 3, 4, 5, and 6), had a single phase of apatite structure. The lattice parameters increased linearly with increasing V content (x) with obeying the Vegard's law. All Ca10(VO4)x(PO4)6 - x(OH)2 (x = I) samples showed the OH vibration band around 3560 cm- 1. The white apatite samples were column crystals with length of about 40-100 nm and width of about 25-40 nm.

Original languageEnglish
Pages (from-to)1406-1409
Number of pages4
JournalMaterials Letters
Issue number8-9
Publication statusPublished - 2008 Mar 31
Externally publishedYes


  • Apatite
  • Catalyst
  • Nanomaterials
  • Phosphate
  • Solid solution
  • Vanadate

ASJC Scopus subject areas

  • Materials Science(all)


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