Aufsatz(elektronisch)2021

Thermal behavior of Cu-doped TiO2 gels synthesized by the sol-gel method

In: Revue roumaine de chimie: Romanian journal of chemistry, Band 66, Heft 3, S. 219-229

"Ilie Murgulescu" Institute of Physical Chemistry of the Roumanian Academy, 202 Spl. Independentei, 060021 Bucharest, Roumania; PANDELE-CUSU, Jeanina; ATKINSON, Irina; RUSU, Adriana; APOSTOL, Nicoleta; TEODORESCU, Valentin; PREDOANA, Luminita; SZILÁGYI, Imre M.; POKOL, György; ZAHARESCU, Maria; "Ilie Murgulescu" Institute of Physical Chemistry of the Roumanian Academy, 202 Spl. Independentei, 060021 Bucharest, Roumania; "Ilie Murgulescu" Institute of Physical Chemistry of the Roumanian Academy, 202 Spl. Independentei, 060021 Bucharest, Roumania; National Institute of Materials Physics, 405 bis Atomistilor Street, 077125 Magurele-Ilfov, Roumania; National Institute of Materials Physics, 405 bis Atomistilor Street, 077125 Magurele-Ilfov, Roumania; "Ilie Murgulescu" Institute of Physical Chemistry of the Roumanian Academy, 202 Spl. Independentei, 060021 Bucharest, Roumania; Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rakpart 3, Hungary; Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rakpart 3, Hungary; "Ilie Murgulescu" Institute of Physical Chemistry of the Roumanian Academy, 202 Spl. Independentei, 060021 Bucharest, Roumania

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Abstract

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.

Verlag

Romanian Academy - Revue Roumaine De Chimie

DOI

10.33224/rrch.2021.66.3.01

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