Journal of Nanoparticle Research

, Volume 3, Issue 2–3, pp 113–118 | Cite as

Synthesis of Titania-supported Copper Nanoparticles via Refined Alkoxide Sol-gel Process

  • Jeffrey C.S. Wu
  • I.-Hsiang Tseng
  • Wan-Chen Chang
Article

Abstract

Nanoparticles of titania and copper-loaded titania were synthesized by a refined sol-gel method using titanium butoxide. Unlike the conventional sol-gel procedure of adding water directly, the esterification of anhydrous butanol and glacial acetic acid provided the hydrolyzing water. In addition, acetic acid also served as a chelating ligand to stabilize the hydrolysis-condensation process and minimize the agglomeration of titania. Following the hydrolysis, Cu/TiO2 was prepared by adding copper chloride to titania sol. The sol was dried, then calcined at 500°C to remove organics and transformed to anatase titania which was verified by XRD. Cu/TiO2 was further hydrogen-reduced at 300°C. The recovery of Ti was exceeded by an average of 95% from titanium butoxide. TEM micrographs show that the Cu/TiO2 particles are near uniform. The average crystallite sizes are 17–20 nm estimated from the peak broadening of XRD spectra. The bandgaps of TiO2 and reduced Cu/TiO2 range from 2.70 to 3.15 eV estimated from the diffusive reflective UV-Vis spectra. XPS analysis shows that Cu 2p3/2 is 933.4 eV indicating primary Cu2O form on the TiO2 supports. The binding energy of Ti does not exhibit chemical shift suggesting negligible interaction of Cu cluster and TiO2 support.

TiO2 copper sol-gel hydrolysis alkoxide 

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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Jeffrey C.S. Wu
    • 1
  • I.-Hsiang Tseng
    • 1
  • Wan-Chen Chang
    • 1
  1. 1.Department of Chemical EngineeringNational Taiwan UniversityTaipeiTaiwan

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