Selective photo-deposition of Cu onto the surface of monodisperse oleic acid capped TiO2 nanorods probed by FT-IR CO-adsorption studies

Todor Hikov, Marie Katrin Schroeter, Lamma Khodeir, Abdelkrim Chemseddine, Martin Muhler, Roland A. Fischer

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

A novel, non-aqueous, organometallic route to nanocomposite Cu@TiO 2 materials is presented. TiO2 nanorods stabilized with oleic acid (OLA) were used as support for the photo-assisted deposition of Cu using the organometallic Cu(ii) precursor [Cu(OCH(CH3)CH 2N(CH3)2)2] (1). The copper precursor 1 penetrates through the shell of OLA and is photo reduced to deposit Cu0 directly at the surface of the TiO2 rods. The obtained Cu decorated nanorods were still soluble in nonpolar organic solvents without change of the morphology of nanorods. The Cu@TiO2 colloid was characterized by means of UV-VIS, XRD, AAS, and HRTEM. FTIR CO adsorption studies provide evidence for Cu0 anchored at the titania surface by a characteristic absorption at 2084 cm-1. Comparative studies of Cu-deposition were performed using CuCl2 as simple Cu source which proved that the concept of organometallic disguise of the metal centre results in a higher reaction rate and the circumvention of non-selective reduction, parasitic side reactions and undesired agglomeration of the OLA stabilized titania nanorods.

Original languageEnglish
Pages (from-to)1550-1555
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume8
Issue number13
DOIs
StatePublished - 2006
Externally publishedYes

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