Open AccessThermal behavior of Cu-doped TiO2 gels synthesized by the sol-gel method
Author(s) -
Jeanina Pandele–Cușu,
Irina Atkinson,
Adriana Rusu,
Nicoleta G. Apostol,
V. S. Teodorescu,
Luminița Predoană,
Imre Miklós Szilágyi,
György Pokol,
Maria Zaharescu,
H Budapest Economics
Publication year - 2021
Publication title -
revue roumaine de chimie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.135
H-Index - 21
ISSN - 0035-3930
DOI - 10.33224/rrch.2021.66.3.01
Subject(s) - x ray photoelectron spectroscopy , thermogravimetric analysis , differential scanning calorimetry , dopant , fourier transform infrared spectroscopy , materials science , transmission electron microscopy , sol gel , analytical chemistry (journal) , differential thermal analysis , thermal decomposition , annealing (glass) , infrared spectroscopy , thermal analysis , scanning electron microscope , doping , diffraction , chemical engineering , chemistry , thermal , chromatography , nanotechnology , organic chemistry , composite material , optics , physics , optoelectronics , meteorology , engineering , thermodynamics
The thermal behavior of Cu-doped TiO2 gels obtained by the sol-gel method was investigated by thermogravimetric and differential thermal analysis (TG/DTG/DTA) and differential scanning calorimetry (DSC) measurements. The comparative investigation of the structure and morphology of the as-prepared gels and of the nanopowders obtained by annealing them was realized by transmission electron microscopy (TEM), Fourier transmission infrared spectroscopy (FTIR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Significant differences were noticed depending on the amount of dopant (0.5 or 2.0 mol % CuO). A higher dopant concentration resulted in a more complex decomposition of the sample. This behavior was associated with the formation of various molecular species in the sol-gel solutions before gelation, determined by the different amount of the dopant used.