Solubilization and titania nano-coating of carbon nanotubes using titanium (IV) tetrabutoxide

Daisuke Sakemi, Wataru Futagami, Yoshitaka Kudo, Shinya Onoue, L. E.E. Seung-Woo, Toyoki Kunitake

Research output: Contribution to journalArticlepeer-review

Abstract

Single-walled and multi-walled carbon nanotubes (CNTs) are soluble in toluene containing titanium (IV) tetrabutoxide and their surface could be successfully covered with an ultrathin TiO2 layer. AFM, SEM, TEM, XPS, X-ray and TG-DTA analysis indicate the TiO2 coating on the surface of CNTs through the hydrolysis of bound titanium alkoxid molecules. After calcination at 450-55O°C, the SWNTs were completely decomposed from the composites and crystalline TiO2 nanotubes that reflect the shape of the SWNTs were formed. From the XPS results of the prepared TiO 2MWNTs samples, the atomic ratio of Ti to C is circa 1:100, indicating that the coated TiO2 layer is very thin. The current approach provides a new direction for hybridization of CNTs with TiO2 that is photocatalytically active in TiO2/CNTs nanocomposites.

Original languageEnglish
Pages (from-to)253-261
Number of pages9
JournalKobunshi Ronbunshu
Volume70
Issue number6
DOIs
Publication statusPublished - Jun 2013

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Materials Science (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

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