TY  - CONF
AU  - Radovanović, Lidija
AU  - Radovanović, Željko
AU  - Kremenović, Aleksandar
AU  - Simović, Bojana
AU  - Vasić, Milica
AU  - Rogan, Jelena
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/691
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  - University in Banjaluka, Faculty of Technology
C3  - XIV CONFERENCE OF CHEMISTS, TECHNOLOGISTS AND ENVIRONMENTALISTS OF REPUBLIC OF SRPSKA, ACADEMY OF SCIENCES AND ARTS OF THE REPUBLIC OF SRPSKA, BANJA LUKA
T1  - Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4
SP  - 192
UR  - https://hdl.handle.net/21.15107/rcub_rims_691
ER  - 

@conference{
author = "Radovanović, Lidija and Radovanović, Željko and Kremenović, Aleksandar and Simović, Bojana and Vasić, Milica 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 = "University in Banjaluka, Faculty of Technology",
journal = "XIV CONFERENCE OF CHEMISTS, TECHNOLOGISTS AND ENVIRONMENTALISTS OF REPUBLIC OF SRPSKA, ACADEMY OF SCIENCES AND ARTS OF THE REPUBLIC OF SRPSKA, BANJA LUKA",
title = "Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4",
pages = "192",
url = "https://hdl.handle.net/21.15107/rcub_rims_691"
}

Radovanović, L., Radovanović, Ž., Kremenović, A., Simović, B., Vasić, M.,& Rogan, J.. (2022). Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4. in XIV CONFERENCE OF CHEMISTS, TECHNOLOGISTS AND ENVIRONMENTALISTS OF REPUBLIC OF SRPSKA, ACADEMY OF SCIENCES AND ARTS OF THE REPUBLIC OF SRPSKA, BANJA LUKA
University in Banjaluka, Faculty of Technology., 192.
https://hdl.handle.net/21.15107/rcub_rims_691

Radovanović L, Radovanović Ž, Kremenović A, Simović B, Vasić M, Rogan J. Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4. in XIV CONFERENCE OF CHEMISTS, TECHNOLOGISTS AND ENVIRONMENTALISTS OF REPUBLIC OF SRPSKA, ACADEMY OF SCIENCES AND ARTS OF THE REPUBLIC OF SRPSKA, BANJA LUKA. 2022;:192.
https://hdl.handle.net/21.15107/rcub_rims_691 .

Radovanović, Lidija, Radovanović, Željko, Kremenović, Aleksandar, Simović, Bojana, Vasić, Milica, Rogan, Jelena, "Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4" in XIV CONFERENCE OF CHEMISTS, TECHNOLOGISTS AND ENVIRONMENTALISTS OF REPUBLIC OF SRPSKA, ACADEMY OF SCIENCES AND ARTS OF THE REPUBLIC OF SRPSKA, BANJA LUKA (2022):192,
https://hdl.handle.net/21.15107/rcub_rims_691 .

TY  - JOUR
AU  - Vasić, Milica
AU  - Terzić, Anja
AU  - Radovanović, Željko
AU  - Radojević, Zagorka
AU  - Warr, L.N.
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/414
AB  - Geopolymerization was investigated as an alternative to traditional ceramic products by developing a more sustainable approach that avoids thermal treatment. The study presents the first known alkali-activation of the raw clay and waste clay brick mixture using the solid to liquid ratios of 2.33 and 2.78. Several experimental sets were prepared to harden under varying conditions (2–4 days drying in 60 °C–70 °C and 3 h steam-curing). Non-activated and activated samples were analyzed for their physical and chemical properties after 14, 21, and 28 days. The tile-shaped specimens exhibited better initial drying behavior than the cubes and produced stronger materials with fewer cracks. Pre-curing in steam conditions induced higher flexural strength (13.7 MPa) and water absorption (13.13%) for the geopolymer tiles. The highest Si/Al molar ratio in the amorphous portion of 5.78 induced the best flexural strength. The geopolymerization process showed microstructural changes associated with the appearance of fibrous Na-zeolite nanocrystals. The degree of geopolymerization and zeolite formation was enhanced by steam-curing, but the microstructural stress and heterogeneity induced by the reactions resulted in higher water absorption. Ongoing reactions of amorphization in the bulk material and further crystallization at the surface are documented after 6 months of curing. This first detailed study reveals that the production of geopolymer ceramics from brick waste is possible, but further optimization of the activating solution and curing parameters is required.
PB  - Elsevier Ltd
T2  - Applied Clay Science
T1  - Alkali-activated geopolymerization of a low illitic raw clay and waste brick mixture. An alternative to traditional ceramics
VL  - 218
DO  - 10.1016/j.clay.2022.106410
ER  - 

@article{
author = "Vasić, Milica and Terzić, Anja and Radovanović, Željko and Radojević, Zagorka and Warr, L.N.",
year = "2022",
abstract = "Geopolymerization was investigated as an alternative to traditional ceramic products by developing a more sustainable approach that avoids thermal treatment. The study presents the first known alkali-activation of the raw clay and waste clay brick mixture using the solid to liquid ratios of 2.33 and 2.78. Several experimental sets were prepared to harden under varying conditions (2–4 days drying in 60 °C–70 °C and 3 h steam-curing). Non-activated and activated samples were analyzed for their physical and chemical properties after 14, 21, and 28 days. The tile-shaped specimens exhibited better initial drying behavior than the cubes and produced stronger materials with fewer cracks. Pre-curing in steam conditions induced higher flexural strength (13.7 MPa) and water absorption (13.13%) for the geopolymer tiles. The highest Si/Al molar ratio in the amorphous portion of 5.78 induced the best flexural strength. The geopolymerization process showed microstructural changes associated with the appearance of fibrous Na-zeolite nanocrystals. The degree of geopolymerization and zeolite formation was enhanced by steam-curing, but the microstructural stress and heterogeneity induced by the reactions resulted in higher water absorption. Ongoing reactions of amorphization in the bulk material and further crystallization at the surface are documented after 6 months of curing. This first detailed study reveals that the production of geopolymer ceramics from brick waste is possible, but further optimization of the activating solution and curing parameters is required.",
publisher = "Elsevier Ltd",
journal = "Applied Clay Science",
title = "Alkali-activated geopolymerization of a low illitic raw clay and waste brick mixture. An alternative to traditional ceramics",
volume = "218",
doi = "10.1016/j.clay.2022.106410"
}

Vasić, M., Terzić, A., Radovanović, Ž., Radojević, Z.,& Warr, L.N.. (2022). Alkali-activated geopolymerization of a low illitic raw clay and waste brick mixture. An alternative to traditional ceramics. in Applied Clay Science
Elsevier Ltd., 218.
https://doi.org/10.1016/j.clay.2022.106410

Vasić M, Terzić A, Radovanović Ž, Radojević Z, Warr L. Alkali-activated geopolymerization of a low illitic raw clay and waste brick mixture. An alternative to traditional ceramics. in Applied Clay Science. 2022;218.
doi:10.1016/j.clay.2022.106410 .

Vasić, Milica, Terzić, Anja, Radovanović, Željko, Radojević, Zagorka, Warr, L.N., "Alkali-activated geopolymerization of a low illitic raw clay and waste brick mixture. An alternative to traditional ceramics" in Applied Clay Science, 218 (2022),
https://doi.org/10.1016/j.clay.2022.106410 . .