TY  - CONF
AU  - Radovanović, Lidija
AU  - Kremenović, Aleksandar
AU  - Radovanović, Željko
AU  - Rogan, Jelena
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6719
AB  - The increasing interest for nanosized mixed metal oxides such as spinels and
spinel-based materials in last decades has been motivated by their wide applications
in photocatalysis, magnetism or solar cells [1]. So far, those materials have been
obtained by conventional ceramic routes that involved high temperature treatments
of precursors like mixed nitrates, carbonates or hydroxides [1]. An approach based
on thermal degradation of metal-organic coordination compounds has been found as
a promising for the preparation of fine-dispersed spinel and spinel-based oxides,
mostly because of the control over stoichiometry as well as the possibility to obtain
the materials with the homogeneous distribution of metal ions [1].
As a continuation of our research relating to the design and synthesis of metal–
organic coordination compounds with the aim of obtaining possibly new functional
materials [2], herein we present the synthesis and characterization of new Mn(II)–
dipyridylamine coordination compound with tetraanion of 1,2,4,5-
benzenetetracarboxylic (pyromellitic) acid. The complex was used as a single-source
precursor for the preparation of nanosized Mn2O3/Mn3O4, Mn2O3 and Mn3O4 by
direct thermolysis in air atmosphere at 450, 965 and 1200 °C, respectively. The main
goal of this research was to investigate the influence of decomposition temperature
of the precursor on stoichiometry of the resulting nanocrystalline spinel-based
manganese oxides. The structural, morphological and spectroscopic properties of
these ceramic materials were also investigated.
PB  - Belgrade : Institut za multidisciplinarna istraživanja
C3  - Programme and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - The use of manganese(II)-pyromellitate complex precursor for the synthesis of nanosized manganese oxides
SP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6719
ER  - 

@conference{
author = "Radovanović, Lidija and Kremenović, Aleksandar and Radovanović, Željko and Rogan, Jelena",
year = "2022",
abstract = "The increasing interest for nanosized mixed metal oxides such as spinels and
spinel-based materials in last decades has been motivated by their wide applications
in photocatalysis, magnetism or solar cells [1]. So far, those materials have been
obtained by conventional ceramic routes that involved high temperature treatments
of precursors like mixed nitrates, carbonates or hydroxides [1]. An approach based
on thermal degradation of metal-organic coordination compounds has been found as
a promising for the preparation of fine-dispersed spinel and spinel-based oxides,
mostly because of the control over stoichiometry as well as the possibility to obtain
the materials with the homogeneous distribution of metal ions [1].
As a continuation of our research relating to the design and synthesis of metal–
organic coordination compounds with the aim of obtaining possibly new functional
materials [2], herein we present the synthesis and characterization of new Mn(II)–
dipyridylamine coordination compound with tetraanion of 1,2,4,5-
benzenetetracarboxylic (pyromellitic) acid. The complex was used as a single-source
precursor for the preparation of nanosized Mn2O3/Mn3O4, Mn2O3 and Mn3O4 by
direct thermolysis in air atmosphere at 450, 965 and 1200 °C, respectively. The main
goal of this research was to investigate the influence of decomposition temperature
of the precursor on stoichiometry of the resulting nanocrystalline spinel-based
manganese oxides. The structural, morphological and spectroscopic properties of
these ceramic materials were also investigated.",
publisher = "Belgrade : Institut za multidisciplinarna istraživanja",
journal = "Programme and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "The use of manganese(II)-pyromellitate complex precursor for the synthesis of nanosized manganese oxides",
pages = "60",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6719"
}

Radovanović, L., Kremenović, A., Radovanović, Ž.,& Rogan, J.. (2022). The use of manganese(II)-pyromellitate complex precursor for the synthesis of nanosized manganese oxides. in Programme and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
Belgrade : Institut za multidisciplinarna istraživanja., 60.
https://hdl.handle.net/21.15107/rcub_technorep_6719

Radovanović L, Kremenović A, Radovanović Ž, Rogan J. The use of manganese(II)-pyromellitate complex precursor for the synthesis of nanosized manganese oxides. in Programme and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:60.
https://hdl.handle.net/21.15107/rcub_technorep_6719 .

Radovanović, Lidija, Kremenović, Aleksandar, Radovanović, Željko, Rogan, Jelena, "The use of manganese(II)-pyromellitate complex precursor for the synthesis of nanosized manganese oxides" in Programme and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):60,
https://hdl.handle.net/21.15107/rcub_technorep_6719 .

TY  - CONF
AU  - Radovanović, Željko
AU  - Radovanović, Lidija
AU  - Kremenović, Aleksandar
AU  - Janaćković, Đorđe
AU  - Petrović, Rada
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6720
AB  - Dicalcium phosphate (DP) materials, of which brushite and monetite were the most known, have
been intensively studied for several decades because of excellent resorptive and osteoconductive
properties that can satisfy the requirements needed for various medical applications, such as bone
cements, coatings of metallic implants and bone grafts [1,2]. Brushite and monetite are the dihydrated (CaHPO4·2H2O) and anhydrous (CaHPO4) forms of DPs, respectively, which showed much
better resorption due to higher solubility in comparison to the hydroxyapatite (HAp) and tricalcium
phosphate (TCP) [2].
In this study, the effect of different post-synthesis treatments on composition and morphology of four
brushite/monetite powders, were analyzed. All the powders have been prepared by modified
precipitation method described previously [3] with molar ratio of starting reagents (NH4)2HPO4 and
Ca(NO3)2·4H2O being 7:10. After filtering, powder I was obtained by drying the precipitate at 105
°C for 4 h, while powder II was obtained by precipitate freezing at ‒10 °C for 72 h, followed by
drying at room temperature for 72 h. By drying the precipitate at 110 °C for 24 h and 105 °C for 3 h,
powders III and IV were obtained, respectively. X-ray powder diffraction (XRPD) revealed that all
the powders are two-phase systems consisting of brushite and monetite: 98.8 mas.% brushite and 1.2
mas.% of monetite in I, 97.7 mas.% brushite and 2.3 mas.% of monetite in II, 66.7 mas.% brushite
and 33.3 mas.% of monetite in III and 45.9 mas.% brushite and 54.1 mas.% of monetite in IV. Field
Emission Scanning Electron Microscopy (FESEM, Figure 1) showed that particles of prepared
materials form the agglomerates in the form of triangular plates. In addition, materials were analyzed
for their spectral, thermal and textural properties.
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts / Second International Conference ELMINA [Electron Microscopy of Nanostructures] 2022, Belgrade, Serbia, August 22nd-26th
T1  - Influence of Post-Synthesis Treatments on the Properties of Brushite/Monetite  Powders
EP  - 147
SP  - 146
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6720
ER  - 

@conference{
author = "Radovanović, Željko and Radovanović, Lidija and Kremenović, Aleksandar and Janaćković, Đorđe and Petrović, Rada",
year = "2022",
abstract = "Dicalcium phosphate (DP) materials, of which brushite and monetite were the most known, have
been intensively studied for several decades because of excellent resorptive and osteoconductive
properties that can satisfy the requirements needed for various medical applications, such as bone
cements, coatings of metallic implants and bone grafts [1,2]. Brushite and monetite are the dihydrated (CaHPO4·2H2O) and anhydrous (CaHPO4) forms of DPs, respectively, which showed much
better resorption due to higher solubility in comparison to the hydroxyapatite (HAp) and tricalcium
phosphate (TCP) [2].
In this study, the effect of different post-synthesis treatments on composition and morphology of four
brushite/monetite powders, were analyzed. All the powders have been prepared by modified
precipitation method described previously [3] with molar ratio of starting reagents (NH4)2HPO4 and
Ca(NO3)2·4H2O being 7:10. After filtering, powder I was obtained by drying the precipitate at 105
°C for 4 h, while powder II was obtained by precipitate freezing at ‒10 °C for 72 h, followed by
drying at room temperature for 72 h. By drying the precipitate at 110 °C for 24 h and 105 °C for 3 h,
powders III and IV were obtained, respectively. X-ray powder diffraction (XRPD) revealed that all
the powders are two-phase systems consisting of brushite and monetite: 98.8 mas.% brushite and 1.2
mas.% of monetite in I, 97.7 mas.% brushite and 2.3 mas.% of monetite in II, 66.7 mas.% brushite
and 33.3 mas.% of monetite in III and 45.9 mas.% brushite and 54.1 mas.% of monetite in IV. Field
Emission Scanning Electron Microscopy (FESEM, Figure 1) showed that particles of prepared
materials form the agglomerates in the form of triangular plates. In addition, materials were analyzed
for their spectral, thermal and textural properties.",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts / Second International Conference ELMINA [Electron Microscopy of Nanostructures] 2022, Belgrade, Serbia, August 22nd-26th",
title = "Influence of Post-Synthesis Treatments on the Properties of Brushite/Monetite  Powders",
pages = "147-146",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6720"
}

Radovanović, Ž., Radovanović, L., Kremenović, A., Janaćković, Đ.,& Petrović, R.. (2022). Influence of Post-Synthesis Treatments on the Properties of Brushite/Monetite  Powders. in Program and Book of Abstracts / Second International Conference ELMINA [Electron Microscopy of Nanostructures] 2022, Belgrade, Serbia, August 22nd-26th
Belgrade : Serbian Academy of Sciences and Arts., 146-147.
https://hdl.handle.net/21.15107/rcub_technorep_6720

Radovanović Ž, Radovanović L, Kremenović A, Janaćković Đ, Petrović R. Influence of Post-Synthesis Treatments on the Properties of Brushite/Monetite  Powders. in Program and Book of Abstracts / Second International Conference ELMINA [Electron Microscopy of Nanostructures] 2022, Belgrade, Serbia, August 22nd-26th. 2022;:146-147.
https://hdl.handle.net/21.15107/rcub_technorep_6720 .

Radovanović, Željko, Radovanović, Lidija, Kremenović, Aleksandar, Janaćković, Đorđe, Petrović, Rada, "Influence of Post-Synthesis Treatments on the Properties of Brushite/Monetite  Powders" in Program and Book of Abstracts / Second International Conference ELMINA [Electron Microscopy of Nanostructures] 2022, Belgrade, Serbia, August 22nd-26th (2022):146-147,
https://hdl.handle.net/21.15107/rcub_technorep_6720 .

TY  - CONF
AU  - Radovanović, Lidija
AU  - Radovanović, Željko
AU  - Kremenović, Aleksandar
AU  - Simović, Bojana
AU  - Vasić, Milica V.
AU  - Rogan, Jelena
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6723
AB  - In recent years, thermal decomposition studies of transition metal complexes with
benzenepolycarboxylate ligands have become an area of a great importance due to the possibility of
obtaining useful metal oxides with desirable electrical, magnetic and catalytic properties [1]. As a
contrast to conventional methods for the preparation of metal oxides, such as hydrothermal or sol–
gel treatment, thermolysis is faster, more efficient and environmentally friendly. Mn(II)–dipya
(dipya = 2,2’-dipyridylamine) complex with tetraanion of 1,2,4,5-benzenetetracarboxylic
(pyromellitic, H4pyr) acid, [Mn2(dipya)2(pyr)(H2O)2], has been prepared and characterized by
elemental, spectral and microscopy analyses. Direct thermolysis of the complex up to 1200 °C in an
air atmosphere yielded spinel Mn3O4 oxide material. The obtained Mn3O4 has been characterized
for its structural, spectroscopic, morphological and optical properties. The possibilities of using this
oxide as photocatalyst or co-photocatalyst for removing textile organic dyes, as well as inorganic
pigmentary material, were also investigated and discussed.
PB  - Banja Luka : University in Banjaluka, Faculty of Technology
C3  - Book of Abstracts / XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska, Banja Luka, October 21-22, 2022
T1  - Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4
SP  - 192
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6723
ER  - 

@conference{
author = "Radovanović, Lidija and Radovanović, Željko and Kremenović, Aleksandar and Simović, Bojana and Vasić, Milica V. and Rogan, Jelena",
year = "2022",
abstract = "In recent years, thermal decomposition studies of transition metal complexes with
benzenepolycarboxylate ligands have become an area of a great importance due to the possibility of
obtaining useful metal oxides with desirable electrical, magnetic and catalytic properties [1]. As a
contrast to conventional methods for the preparation of metal oxides, such as hydrothermal or sol–
gel treatment, thermolysis is faster, more efficient and environmentally friendly. Mn(II)–dipya
(dipya = 2,2’-dipyridylamine) complex with tetraanion of 1,2,4,5-benzenetetracarboxylic
(pyromellitic, H4pyr) acid, [Mn2(dipya)2(pyr)(H2O)2], has been prepared and characterized by
elemental, spectral and microscopy analyses. Direct thermolysis of the complex up to 1200 °C in an
air atmosphere yielded spinel Mn3O4 oxide material. The obtained Mn3O4 has been characterized
for its structural, spectroscopic, morphological and optical properties. The possibilities of using this
oxide as photocatalyst or co-photocatalyst for removing textile organic dyes, as well as inorganic
pigmentary material, were also investigated and discussed.",
publisher = "Banja Luka : University in Banjaluka, Faculty of Technology",
journal = "Book of Abstracts / XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska, Banja Luka, October 21-22, 2022",
title = "Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4",
pages = "192",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6723"
}

Radovanović, L., Radovanović, Ž., Kremenović, A., Simović, B., Vasić, M. V.,& Rogan, J.. (2022). Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4. in Book of Abstracts / XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska, Banja Luka, October 21-22, 2022
Banja Luka : University in Banjaluka, Faculty of Technology., 192.
https://hdl.handle.net/21.15107/rcub_technorep_6723

Radovanović L, Radovanović Ž, Kremenović A, Simović B, Vasić MV, Rogan J. Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4. in Book of Abstracts / XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska, Banja Luka, October 21-22, 2022. 2022;:192.
https://hdl.handle.net/21.15107/rcub_technorep_6723 .

Radovanović, Lidija, Radovanović, Željko, Kremenović, Aleksandar, Simović, Bojana, Vasić, Milica V., Rogan, Jelena, "Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4" in Book of Abstracts / XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska, Banja Luka, October 21-22, 2022 (2022):192,
https://hdl.handle.net/21.15107/rcub_technorep_6723 .