Authors:
Maria Crişan Laboratory of Oxide Materials Science Institute of Physical Chemistry ‘Ilie Murgulescu’ 202 Splaiul Independenţei 060021 Bucharest Romania

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Ana Brăileanu Laboratory of Oxide Materials Science Institute of Physical Chemistry ‘Ilie Murgulescu’ 202 Splaiul Independenţei 060021 Bucharest Romania

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D. Crişan Laboratory of Oxide Materials Science Institute of Physical Chemistry ‘Ilie Murgulescu’ 202 Splaiul Independenţei 060021 Bucharest Romania

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Mălina Răileanu Laboratory of Oxide Materials Science Institute of Physical Chemistry ‘Ilie Murgulescu’ 202 Splaiul Independenţei 060021 Bucharest Romania

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N. Drăgan Laboratory of Oxide Materials Science Institute of Physical Chemistry ‘Ilie Murgulescu’ 202 Splaiul Independenţei 060021 Bucharest Romania

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Diana Mardare ‘Al.I. Cuza’ University Faculty of Physics 11 Carol I Blvd. 700506 Iaşi Romania

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V. Teodorescu National Institute for Physics of Materials P.O. Box MG 07 Bucharest, Măgurele Romania

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Adelina Ianculescu University ‘Politehnica’ 1 Gh. Polizu 011061 Bucharest Romania

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Ruxandra Bîrjega National Institute for Lasers Plasma and Radiation Physics P.O. Box MG-36 769000 Bucharest Romania

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M. Dumitru National Institute for Lasers Plasma and Radiation Physics P.O. Box MG-36 769000 Bucharest Romania

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Abstract  

Among the great number of sol-gel materials prepared, TiO2 holds one of the most important places due to its photocatalytic properties, both in the case of powders and coatings. Impurity doping is one of the typical approaches to extend the spectral response of a wide band gap semiconductor to visible light. This work has studied some un-doped and Pd-doped sol-gel TiO2 nanopowders, presenting various surface morphologies and structures. The obtained powders have been embedded in vitreous TiO2 matrices and the corresponding coatings have been prepared by dipping procedure, on glass substrates. The relationship between the synthesis conditions and the properties of titania nanosized materials, such as thermal stability, phase composition, crystallinity, morphology and size of particles, and the influence of dopant was investigated. The influence of Pd on TiO2 crystallization both for supported and unsupported materials was studied (lattice parameters, crystallite sizes, internal strains). The hydrophilic properties of the films were also connected with their structure, composition and surface morphology. The methods used for the characterization of the materials have been: simultaneous thermogravimetry and differential thermal analysis, powder X-ray diffraction, electron microscopy (TEM, SAED) and AFM.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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