Hydrothermal synthesis of 3D TiO2 nanostructures using nitric acid: Characterization and evolution mechanism

Erdogan N., ÖZTÜRK A., PARK J.

CERAMICS INTERNATIONAL, cilt.42, sa.5, ss.5985-5994, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 5
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.ceramint.2015.12.148
  • Dergi Adı: CERAMICS INTERNATIONAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5985-5994
  • Anahtar Kelimeler: TiO2, Hydrothermal process, Crystal growth, Nanostructured materials, Nitric acid, ANATASE TIO2, RUTILE TIO2, PHASE, NANOPARTICLES, PERFORMANCE, MORPHOLOGY, PARTICLES, NANORODS, POWDERS, GROWTH
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Various morphologies of TiO2 nanostructures were synthesized by HNO3 assisted hydrothermal treatment with respect to the acid molarity (1 M, 3 M, and 8 M), temperature (110, 140, and 180 degrees C), and time (1, 3, and 6 h). An additional sample was synthesized inside the protonated titanate nanoribbon coated vessel with the acid molarity of 8M at 140 degrees C for 3 h. The crystal structure and morphology of the nanostructures synthesized were investigated using X-Ray diffractometer, scanning electron microscope, and transmission electron microscope. The results revealed that lower acid concentrations, longer synthesis durations and higher temperatures favored anatase phase formation. Meanwhile, a phase pure 3D lotus structure ruffle TiO2 could be obtained by hydrothermal synthesis at 8M HNO3 concentration at 140 degrees C for 3 h using protonated Htitanate nanoribbons. A probable mechanism for the evolution of 3D ruffle lotus structure was highlighted. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.