Halloysite-TiO2 nanocomposites: Synthesis and characterization

Dimitris Papoulis, Sridhar Komarneni, Dionisios Panagiotaras, Hiroaki Katsuki

Research output: Contribution to conferencePaperpeer-review


In this paper we describe the synthesis and characterization of nano-sized TiO2 particles supported on Halloysite with halloysite to TiO2 weight ratios of 30:70. Two halloysite- TiO2 nanocomposites were prepared using two different halloysites (from Limnos island Greece and from Utah, USA). Both halloysite - TiO2 nanocomposites were prepared by deposition of anatase form of TiO2 on the halloysite surfaces using a sol-gel method with titanium isopropoxide as a precursor under hydrothermal treatment at 180 °C. Phase composition, particle morphology and physical properties of these samples were characterized using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Attenuated Total Reflection using Fourier Transform Infrared spectroscopy (ATR-FTIR) and N2 specific surface area (SSA) analysis by BET. Preparation of halloysite-TiO2 nanocomposites led to good dispersion of 3-10nm TiO2 particles on halloysite surfaces. ATR-FTIR results indicated the formation of hydrogen bonding between the outer surfaces of halloysite tubes and TiO2. After compositing with TiO2 both halloysite samples largely showed interparticle mesopores of about 5.7nm, while halloysite from Utah, USA retained a higher SSA compared to the one from Limnos island Greece.

Original languageEnglish (US)
Number of pages8
StatePublished - 2012
Event12th International Multidisciplinary Scientific GeoConference and EXPO, SGEM 2012 - Varna, Bulgaria
Duration: Jun 17 2012Jun 23 2012


Other12th International Multidisciplinary Scientific GeoConference and EXPO, SGEM 2012

All Science Journal Classification (ASJC) codes

  • Earth-Surface Processes
  • Geology
  • Environmental Engineering
  • Management, Monitoring, Policy and Law


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