TY  - JOUR
AU  - Pavlović, Jelena
AU  - Šuligoj, Andraž
AU  - Opresnik, Mojca
AU  - Tušar-Novak, Nataša
AU  - Zabukovec-Logar, Nataša
AU  - Rajić, Nevenka
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5051
AB  - The present study focuses on clinoptilolite (CLI)-rich natural zeolitic tuffs and their photocatalytic activity in the degradation of cationic organic dyes. CLI from different regions was tested in the photocatalytic degradation of methylene blue (MB) as a model cationic dye. The photocatalytic tests were performed at room temperature and atmospheric pressure under visible light irradiation. For all the CLI samples, the highest activity was observed at pH = 6. Total MB degradation varied between 70 and 91% (C0 = 10 mg dm–3, 0.2 g dm–3 of photocatalyst, during 300 min). It is suggested that the presence of Fe species in the studied tuffs is responsible for the photocatalytic activity. The activity increases linearly with the Fe content in the tuffs. The MB photodegradation follows the Langmuir–Hinshelwood kinetic model. The recyclability tests showed good stability and efficiency of the photocatalyst. The degradation rate decreased from 91 to 69% during three reaction cycles, indicating a promising potential of natural zeolites in the treatment of textile industry wastewater.
PB  - MDPI
T2  - Catalysts
T1  - Studies of Clinoptilolite-Rich Zeolitic Tuffs from Different Regions and Their Activity in Photodegradation of Methylene Blue
IS  - 2
SP  - 224
VL  - 12
DO  - https://doi.org/10.3390/catal12020224
ER  - 

@article{
author = "Pavlović, Jelena and Šuligoj, Andraž and Opresnik, Mojca and Tušar-Novak, Nataša and Zabukovec-Logar, Nataša and Rajić, Nevenka",
year = "2022",
abstract = "The present study focuses on clinoptilolite (CLI)-rich natural zeolitic tuffs and their photocatalytic activity in the degradation of cationic organic dyes. CLI from different regions was tested in the photocatalytic degradation of methylene blue (MB) as a model cationic dye. The photocatalytic tests were performed at room temperature and atmospheric pressure under visible light irradiation. For all the CLI samples, the highest activity was observed at pH = 6. Total MB degradation varied between 70 and 91% (C0 = 10 mg dm–3, 0.2 g dm–3 of photocatalyst, during 300 min). It is suggested that the presence of Fe species in the studied tuffs is responsible for the photocatalytic activity. The activity increases linearly with the Fe content in the tuffs. The MB photodegradation follows the Langmuir–Hinshelwood kinetic model. The recyclability tests showed good stability and efficiency of the photocatalyst. The degradation rate decreased from 91 to 69% during three reaction cycles, indicating a promising potential of natural zeolites in the treatment of textile industry wastewater.",
publisher = "MDPI",
journal = "Catalysts",
title = "Studies of Clinoptilolite-Rich Zeolitic Tuffs from Different Regions and Their Activity in Photodegradation of Methylene Blue",
number = "2",
pages = "224",
volume = "12",
doi = "https://doi.org/10.3390/catal12020224"
}

Pavlović, J., Šuligoj, A., Opresnik, M., Tušar-Novak, N., Zabukovec-Logar, N.,& Rajić, N.. (2022). Studies of Clinoptilolite-Rich Zeolitic Tuffs from Different Regions and Their Activity in Photodegradation of Methylene Blue. in Catalysts
MDPI., 12(2), 224.
https://doi.org/https://doi.org/10.3390/catal12020224

Pavlović J, Šuligoj A, Opresnik M, Tušar-Novak N, Zabukovec-Logar N, Rajić N. Studies of Clinoptilolite-Rich Zeolitic Tuffs from Different Regions and Their Activity in Photodegradation of Methylene Blue. in Catalysts. 2022;12(2):224.
doi:https://doi.org/10.3390/catal12020224 .

Pavlović, Jelena, Šuligoj, Andraž, Opresnik, Mojca, Tušar-Novak, Nataša, Zabukovec-Logar, Nataša, Rajić, Nevenka, "Studies of Clinoptilolite-Rich Zeolitic Tuffs from Different Regions and Their Activity in Photodegradation of Methylene Blue" in Catalysts, 12, no. 2 (2022):224,
https://doi.org/https://doi.org/10.3390/catal12020224 . .

TY  - CHAP
AU  - Rajić, Nevenka
AU  - Kaučič, Venčeslav
AU  - Zabukovec Logar, Nataša
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6401
AB  - Aluminophosphate molecular sieves exhibit structural and compositional diversity. Their frameworks can be modified by other elements, thus providing novel silicoaluminophosphate (SAPO), metaloaluminophosphate (MAPO), and metalosilicoaluminophosphate (MAPSO) materials. They possess the characteristics of both zeolites and aluminophosphates, all of which result in unique catalytic, ion-exchange, and adsorbent properties. Aluminophosphate molecular sieves have been prepared hydrothermally in nonaqueous reaction media. The crystallization process depends on a number of variables including temperature, time, molar ratio of the reactants, and pH. The most commonly investigated metal ions incorporated into aluminophosphate frameworks are transition metal ions of first transition series. Different characterization techniques are used for studying their oxidation number, location, and coordination environment within aluminophosphate frameworks. These parameters, together with structural characteristics of the framework such as pore size, pore shape, and geometry, significantly affect the catalytic performance of aluminophosphate materials. Methanol-to-olefin conversion and oxidation reactions are instances of industrially important reaction systems where aluminophosphate molecular sieves demonstrate an important catalytic performance
PB  - John Wiley and Sons Inc
T2  - Encyclopedia of Catalysis
T1  - Molecular Sieves: Aluminophosphates
DO  - 10.1002/0471227617.eoc151.pub2
ER  - 

@inbook{
author = "Rajić, Nevenka and Kaučič, Venčeslav and Zabukovec Logar, Nataša",
year = "2011",
abstract = "Aluminophosphate molecular sieves exhibit structural and compositional diversity. Their frameworks can be modified by other elements, thus providing novel silicoaluminophosphate (SAPO), metaloaluminophosphate (MAPO), and metalosilicoaluminophosphate (MAPSO) materials. They possess the characteristics of both zeolites and aluminophosphates, all of which result in unique catalytic, ion-exchange, and adsorbent properties. Aluminophosphate molecular sieves have been prepared hydrothermally in nonaqueous reaction media. The crystallization process depends on a number of variables including temperature, time, molar ratio of the reactants, and pH. The most commonly investigated metal ions incorporated into aluminophosphate frameworks are transition metal ions of first transition series. Different characterization techniques are used for studying their oxidation number, location, and coordination environment within aluminophosphate frameworks. These parameters, together with structural characteristics of the framework such as pore size, pore shape, and geometry, significantly affect the catalytic performance of aluminophosphate materials. Methanol-to-olefin conversion and oxidation reactions are instances of industrially important reaction systems where aluminophosphate molecular sieves demonstrate an important catalytic performance",
publisher = "John Wiley and Sons Inc",
journal = "Encyclopedia of Catalysis",
booktitle = "Molecular Sieves: Aluminophosphates",
doi = "10.1002/0471227617.eoc151.pub2"
}

Rajić, N., Kaučič, V.,& Zabukovec Logar, N.. (2011). Molecular Sieves: Aluminophosphates. in Encyclopedia of Catalysis
John Wiley and Sons Inc..
https://doi.org/10.1002/0471227617.eoc151.pub2

Rajić N, Kaučič V, Zabukovec Logar N. Molecular Sieves: Aluminophosphates. in Encyclopedia of Catalysis. 2011;.
doi:10.1002/0471227617.eoc151.pub2 .

Rajić, Nevenka, Kaučič, Venčeslav, Zabukovec Logar, Nataša, "Molecular Sieves: Aluminophosphates" in Encyclopedia of Catalysis (2011),
https://doi.org/10.1002/0471227617.eoc151.pub2 . .

TY  - JOUR
AU  - Rajić, Nevenka
AU  - Zabukovec Logar, Nataša
AU  - Kaučič, Venčeslav
PY  - 1995
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6387
AB  - The crystallization of a reactive zincophosphate gel (which may contain Co(ll) component) in the presence of sodium cations at ambient temperature and pressure yielded products (abbreviated ZnPO-HEX or CoZnPO-HEX) with a novel anionic open framework topology. The Co(ll) ions isomorphously replace zinc(ll) in this zincophosphate lattice up to 30%. The hopeite phase appears as a precursor in the crystallization of these new products. The single crystal structure determination of CoZnPO-HEX reveals that the structure belongs to the hexagonal P61 space group with unit cell parameters a = 10.447(3) and c = 15.049(5) A. The structure consists of a three-dimensional tetrahedral framework containing one-dimensional six-ring channels. An in finite helix built up of sodium cations and water molecules has been found inside the channel. 
The helix plays an important structural role because a complete dehydration of the materials is the cause for the transformation of the hexagonal structure to an unknown crystalline phase.
PB  - Elsevier Science Inc.
T2  - Zeolites
T1  - A novel open framework zincophosphate:  Synthesis and characterization
EP  - 678
IS  - 8
SP  - 672
VL  - 15
DO  - 10.1016/0144-2449(95)00083-I
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6387
ER  - 

@article{
author = "Rajić, Nevenka and Zabukovec Logar, Nataša and Kaučič, Venčeslav",
year = "1995",
abstract = "The crystallization of a reactive zincophosphate gel (which may contain Co(ll) component) in the presence of sodium cations at ambient temperature and pressure yielded products (abbreviated ZnPO-HEX or CoZnPO-HEX) with a novel anionic open framework topology. The Co(ll) ions isomorphously replace zinc(ll) in this zincophosphate lattice up to 30%. The hopeite phase appears as a precursor in the crystallization of these new products. The single crystal structure determination of CoZnPO-HEX reveals that the structure belongs to the hexagonal P61 space group with unit cell parameters a = 10.447(3) and c = 15.049(5) A. The structure consists of a three-dimensional tetrahedral framework containing one-dimensional six-ring channels. An in finite helix built up of sodium cations and water molecules has been found inside the channel. 
The helix plays an important structural role because a complete dehydration of the materials is the cause for the transformation of the hexagonal structure to an unknown crystalline phase.",
publisher = "Elsevier Science Inc.",
journal = "Zeolites",
title = "A novel open framework zincophosphate:  Synthesis and characterization",
pages = "678-672",
number = "8",
volume = "15",
doi = "10.1016/0144-2449(95)00083-I",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6387"
}

Rajić, N., Zabukovec Logar, N.,& Kaučič, V.. (1995). A novel open framework zincophosphate:  Synthesis and characterization. in Zeolites
Elsevier Science Inc.., 15(8), 672-678.
https://doi.org/10.1016/0144-2449(95)00083-I
https://hdl.handle.net/21.15107/rcub_technorep_6387

Rajić N, Zabukovec Logar N, Kaučič V. A novel open framework zincophosphate:  Synthesis and characterization. in Zeolites. 1995;15(8):672-678.
doi:10.1016/0144-2449(95)00083-I
https://hdl.handle.net/21.15107/rcub_technorep_6387 .

Rajić, Nevenka, Zabukovec Logar, Nataša, Kaučič, Venčeslav, "A novel open framework zincophosphate:  Synthesis and characterization" in Zeolites, 15, no. 8 (1995):672-678,
https://doi.org/10.1016/0144-2449(95)00083-I .,
https://hdl.handle.net/21.15107/rcub_technorep_6387 .