This paper is focused on the sol-gel synthesis and characterization of CuO-based nanosystemsboth in the form of supported films and as guest nanoclusters embedded in a silica matrix. Inboth cases copper acetate (Cu(CH3COO)2 .H2O) was used as Cu source and, for the CuO :SiO2nanocomposite systems, tetraethoxysilane (Si(OC2H5)4, TEOS) was adopted as silica precursor.Films were obtained by a dip-coating procedure and subsequently treated in air between 100 and900º C. The system evolution on thermal annealing was studied by X-ray photoelectronspectroscopy (XPS), Glancing-Incidence X-ray diffraction (GIXRD) and optical absorption.Irrespective of the processing conditions, the formation of tenorite (CuO) crystallites withnanometric dimension was observed. In the nanocomposite samples, copper was homogeneouslydistributed in the host matrix and stable CuO nanoclusters (? ? 15 nm) were obtained.
Sol-Gel Synthesis and Characterization of CuO-Based Nanosystems
L Armelao;D Barreca;G Bottaro;
2003
Abstract
This paper is focused on the sol-gel synthesis and characterization of CuO-based nanosystemsboth in the form of supported films and as guest nanoclusters embedded in a silica matrix. Inboth cases copper acetate (Cu(CH3COO)2 .H2O) was used as Cu source and, for the CuO :SiO2nanocomposite systems, tetraethoxysilane (Si(OC2H5)4, TEOS) was adopted as silica precursor.Films were obtained by a dip-coating procedure and subsequently treated in air between 100 and900º C. The system evolution on thermal annealing was studied by X-ray photoelectronspectroscopy (XPS), Glancing-Incidence X-ray diffraction (GIXRD) and optical absorption.Irrespective of the processing conditions, the formation of tenorite (CuO) crystallites withnanometric dimension was observed. In the nanocomposite samples, copper was homogeneouslydistributed in the host matrix and stable CuO nanoclusters (? ? 15 nm) were obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
