SOL-GEL HYBRID NANOCOMPOSITES WITH OXIDE NANOPARTICLES

作者：Predoana Luminita; Gartner Mariuca; Teodorescu Valentin Serban; Nicolescu Madalina; Anastasescu Mihai^*; Zaharescu Maria

来源：Romanian Journal of Chemistry, 2013, 58(2-3): 239-249.

• sol-gel
• hybrid films
• spectroellipsometry
• oxide nanoparticles embedment

In the present work the influence of the method of preparation on the characteristics of sol-gel hybrid nanocomposites with oxide nanoparticles was studied. The chosen system consists of a SiO2 matrix based on methyltriethoxysilane (MTEOS) and laboratory made TiO2:CeO2 (4:1) nanopowder. The doping of the matrix was realized either by dispersion of previously prepared binary nanopowder in the matrix solution or by in situ generation of the TiO2-CeO2 nanoparticles during the matrix hydrolysis-condensation processes. Films were deposited on silicon wafer and glass substrates by dip-coating method and were characterized as prepared and annealed at 120 degrees C. The optical and morphological properties were determined by spectroellipsometry (SE), scanning electron microscopy (SEM), atomic force microscopy (AFM), their structural characterization was realized by IR spectroscopy and the thermal behavior was determined by thermogravimetric and differential-thermal analysis (TG/DTA). All characterization methods have shown that by the two preparation routes materials with different characteristics were obtained.

• 出版日期2013-3