Synthesis and Morphological Characterization of Gold Nanoparticles (AuNPs) Supported on Anodized Titanium Oxide (TiO₂) Nanotubes

Abstract:

Increasing interest of attachment gold nanoparticles (AuNPs) on titanium oxide (TiO₂) nanotubes has been devoted to give tremendous properties suitable for catalysis application. Nevertheless, achieving precise control of attachment AuNPs on the TiO₂ nanotubes substrate by conventional methods such as thermal evaporation and conservative heating are far from satisfactory. Herein, in this work a new approach has been developed to synthesize controlled and uniformed attachment of AuNPs onto electrochemically-anodized TiO₂ nanotubes by deposition-precipitation method. The structural and elemental characterizations of the supported AuNPs are carried out by means of field emission scanning electron microscopy (FESEM) and energy dispersive X-ray spectroscopy (EDX) analysis. The FESEM image showed the anodized TiO₂ nanotube with good morphological structure is successfully fabricated at a voltage of 20 V and in a mixture electrolyte of ethylene glycol containing 0.5 wt% ammonium fluoride solutions with an average nanotubes diameter of 87 nm. Meanwhile, the attachment of AuNPs on the fabricated TiO₂ nanotubes has been effectively achieved for both calcined and uncalcined samples. The EDX analysis has confirmed the deposition of AuNPs over the TiO₂ nanotubes. The results showed that we had succeeded in synthesizing the AuNPs supported on the anodized TiO₂ nanotubes, which provide superior metal-metal oxide synthetic devices for diverse applications.

• Periodical: Materials Science Forum (Volume 819)
• Pages: 405-410
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.819.405
• Online since: June 2015
• Authors: Anisah Shafiqah Habiballah, Abdul Hadi Mahmud, Hanani Yazid, A.M.M. Jani*
• Keywords: Deposition-Precipitation, Electrochemical Anodization, Gold Nanoparticles, Titanium Oxide Nanotubes

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