XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
202
T1: P–69
The structure of new erbium-doped fluorotellurite glasses
Manuela Reben
1
, Yousef El Sayed
2
, and Iwona Grelowska
1
1
Faculty of Materials Science and Ceramics, AGH University of Science and Technology,
al. Mickiewicza 30, 30-059 Cracow, Poland, e-mail: iwona.grelowska@gmail.com
2
Department of Physics, Faculty of Sciences, King Khalid University, P. O. Box 9004, Abha,
Saudi Arabia
The goal of this work was to determine the effect of selected modifiers on the structural,
thermal and optical properties of the (z 5)TeO
2
– 5M
x
O
y
– 10P
2
O
5
– 10ZnO – 5PbF
2
in mol %,
where M
x
O
y
= (CdO, SrO, PbO, MgO) glass systems. Raman spectra allow relating the glass
structure and vibration properties (i.e. vibrational frequencies and Raman intensities) with the
glass composition. The fluorotellurite glass stability is directly related to the structure of TeO
4
groups. Raman spectra indicate that CdO, SrO, PbO and MgO will mitigate the destructive
effect of fluoride on TeO
4
entities. The DSC studies have been performed to determine the
thermal changes occurring during glass heating. Obtained results demonstrate that the new
compositions lead to good thermal properties, the high value of KH of a certain glass, proved its
stability against crystallization.
Keywords: fluorotellurite glasses; Raman spectra; Hruby parameter
Acknowledgment
This work was supported by the statutory funds AGH University of Science and Technology Department of
Materials Science and Ceramics AGH number WIMiC No 11.11.160.365 in 2017.
References
[1] J. Yue, T. Xue, F. Huang, M. Liao, Y. Ohishi, J. Non-Cryst. Solid. 408 (2015) 1.
[2] M. Reben, Y. El Sayed, I. Grelowska, M. Kosmal, M. Szumera, J. Therm. Anal. Calorim. 125 (2016)
1279.
XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
203
T1: P–70
Spectroscopy studies of TiO
2
/carbon nanotubes nanocomposite layers
synthesized by the sol-gel method
Marek Nocuń
1
, Sławomir Kwaśny
1
, Magdalena Kwaśny
1
, Iwona Grelowska
1
Faculty of Materials Science and Ceramics, AGH University of Science and Technology,
al. Mickiewicza 30, 30-059 Cracow, Poland, e-mail: nocun@agh.edu.pl
Titanium dioxide/multiwalled carbon nanotubes (MWCNT) nanocomposites were prepared
by sol-gel method in the form of a thin layer on glass substrate. Samples were characterized by
X-ray diffraction (XRD) and Grazing Incidence Diffraction (GID), Raman, FTIR and UV-VIS
spectroscopy, as well as scanning electron microscopy (SEM). The photocatalytic activity of
prepared films was evaluated by the detection of changes in the UV-VIS spectra after the
discoloration of Reactive Black V pigment in water solution. It was found that the crystalline
TiO
2
is composed of anatase phase only. Presence of MWCNTs in the composite increases the
size of TiO
2
particles. In spite of ultrasonic disintegration carbon nanotubes are not dispersed
uniformly in the nanocomposite but form agglomerates. Modification of the TiO
2
layer by
carbon nanotubes declines transmission of the coatings up to 30%. Additive of nanotubes into
the TiO
2
resulted in an increase in photocatalytic activity in both the UV and visible range by 10
and 50% respectively compare to (about 50%). Furthermore, carbon nanotubes lead to better
adsorption of the dye on the surface and significant reduction in the contact angle (by
approximately 50%).
Keywords: carbon nanotubes; titanium dioxide; thin films; sol-gel
XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
204
T1: P–71
Structure, biocompatibility and thermal properties of melt-derived
SiO
2
-CaO-ZnO glasses
Aleksandra Wajda
1
, Alina Grünewald
2
, Aldo R. Boccaccini
2
, and Maciej Sitarz
1
1
Faculty of Materials Science and Ceramics, AGH University of Science and Technology,
Mickiewicza 30, 30-059 Cracow, Poland, e-mail: olawajda@agh.edu.pl
2
Institute of Biomaterials, Department of Materials Science and Engineering, Friedrich-Alexander-
Universität Erlangen-Nürnberg, Cauerstrasse 6, 91058 Erlangen, Germany
In many cases of trauma and injuries to the skeletal system, the particular need for
biomaterials with superior properties is required. One of the most attractive materials are
bioactive glasses, which have the ability to form strong chemical bonds with living tissue when
they are implanted or in contact with biological fluids. Controlled release of ionic dissolution
products, in particular, concentrations of soluble silica (Si
4+
) and calcium (Ca
2+
) are known to be
essential to the bioactive process [1]. The choice of zinc was related to its antibacterial
properties and important role in bone formation. Moreover, zinc is an essential element involved
in the bone resorption process, bone mass preservation, and it is a co-factor for many enzymes
[2].
The subject of this paper is zinc-doped glasses from binary SiO
2
-CaO system. Several
compositions of glasses were fabricated to obtain bioactive glasses in a simpler system than
those at present. X-ray, IR and Raman spectroscopy measurements were performed to
characterize amorphous state and the structure of the samples. The glasses were soaked in a
simulated body fluid (SBF) at 37°C for 30 days to test their bioactivity and ICP measurements
were carried out for ion concentration determination. The cellular biocompatibility of the
prepared samples was assessed by means of cellular response of osteoblast-like cells (MG-63).
Cell morphology, the number of attached cells (LDH activity) and cell viability (mitochondrial
activity, WST) were evaluated. Moreover thermal analysis (DTA) was carried out to check if the
crystallization of the glass is possible.
Keywords: bioactive glasses; FTIR spectroscopy; glass structure; antibacterial biomaterials
Acknowledgment
This work was supported by NCN project “Bioactive silico-phosphate glassy and glass-crystalline materials
containing antibacterial ions 2016/20/T/ST8/00204”.
References
[1] M.N. Rahaman, D.E. Day, B.S. Bal, Q. Fu, S.B. Jung, L.F. Bonewald, A. P. Tomsia, Acta Biomater. 6
(2011) 2355.
[2] P. Balasubramanian, L.A. Strobel, U. Kneser, A.R. Boccaccini, Biomed. Glasses 1 (2015) 51.
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