TY  - JOUR
AU  - Barbieriková, Zuzana
AU  - Šimunková, Miriama
AU  - Brezová, Vlasta
AU  - Sredojević, Dušan
AU  - Lazić, Vesna M.
AU  - Lončarević, Davor
AU  - Nedeljković, Jovan
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10091
AB  - The attachment of squaric acid, a non-aromatic molecule, to the surface of TiO2 powder induced the optical absorption of the obtained hybrid material in the visible spectral range due to the interfacial charge transfer complex formation. The optical characterization of the hybrid is supported by the density functional theory calculations of the model cluster. The paramagnetic species generated upon excitation with ultraviolet or visible light, in both TiO2 powders, pristine and surface-modified, were identified conducting low-temperature solid-state and indirect electron paramagnetic resonance (EPR) spectroscopy experiments (spin trapping and spin scavenging). The solid-state EPR experiments indicated the promotion of electrons from the organic moiety to the titania conduction band under visible-light excitation of hybrid. Also, the spin scavenging experiments showed that the electrons generated in the hybrid upon the visible-light activation facilitate the reduction of the radical cations present in the dispersion, while these effects are not observed for pristine TiO2.
T2  - Optical Materials
T1  - Interfacial charge transfer complex between TiO2 and non-aromatic ligand squaric acid
VL  - 123
SP  - 111918
DO  - 10.1016/j.optmat.2021.111918
ER  - 

@article{
author = "Barbieriková, Zuzana and Šimunková, Miriama and Brezová, Vlasta and Sredojević, Dušan and Lazić, Vesna M. and Lončarević, Davor and Nedeljković, Jovan",
year = "2022",
abstract = "The attachment of squaric acid, a non-aromatic molecule, to the surface of TiO2 powder induced the optical absorption of the obtained hybrid material in the visible spectral range due to the interfacial charge transfer complex formation. The optical characterization of the hybrid is supported by the density functional theory calculations of the model cluster. The paramagnetic species generated upon excitation with ultraviolet or visible light, in both TiO2 powders, pristine and surface-modified, were identified conducting low-temperature solid-state and indirect electron paramagnetic resonance (EPR) spectroscopy experiments (spin trapping and spin scavenging). The solid-state EPR experiments indicated the promotion of electrons from the organic moiety to the titania conduction band under visible-light excitation of hybrid. Also, the spin scavenging experiments showed that the electrons generated in the hybrid upon the visible-light activation facilitate the reduction of the radical cations present in the dispersion, while these effects are not observed for pristine TiO2.",
journal = "Optical Materials",
title = "Interfacial charge transfer complex between TiO2 and non-aromatic ligand squaric acid",
volume = "123",
pages = "111918",
doi = "10.1016/j.optmat.2021.111918"
}

Barbieriková, Z., Šimunková, M., Brezová, V., Sredojević, D., Lazić, V. M., Lončarević, D.,& Nedeljković, J.. (2022). Interfacial charge transfer complex between TiO2 and non-aromatic ligand squaric acid. in Optical Materials, 123, 111918.
https://doi.org/10.1016/j.optmat.2021.111918

Barbieriková Z, Šimunková M, Brezová V, Sredojević D, Lazić VM, Lončarević D, Nedeljković J. Interfacial charge transfer complex between TiO2 and non-aromatic ligand squaric acid. in Optical Materials. 2022;123:111918.
doi:10.1016/j.optmat.2021.111918 .

Barbieriková, Zuzana, Šimunková, Miriama, Brezová, Vlasta, Sredojević, Dušan, Lazić, Vesna M., Lončarević, Davor, Nedeljković, Jovan, "Interfacial charge transfer complex between TiO2 and non-aromatic ligand squaric acid" in Optical Materials, 123 (2022):111918,
https://doi.org/10.1016/j.optmat.2021.111918 . .

TY  - JOUR
AU  - Barbieriková, Zuzana
AU  - Lončarević, Davor
AU  - Papan, Jelena
AU  - Vukoje, Ivana D.
AU  - Stoiljković, Milovan
AU  - Ahrenkiel, Scott Phillip
AU  - Nedeljković, Jovan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9756
AB  - The efficiency of titanate-nanotubes-based photocatalysts towards hydrogen production was studied in the presence of the sacrificial agent, 2-propanol. The highest hydrogen production rate (~120 lmol h 1 g 1 ) was observed over surface-modified titanate nanotubes by 5-amino salicylic acid decorated with nanometer-sized silver nanoparticles. The X-ray diffraction analysis, transmission electron microscopy, nitrogen adsorption–desorption isotherms, and diffuse reflection spectroscopy were applied to characterize the prepared photocatalytic materials. The better photocatalytic performance of inorganic–organic hybrid materials in comparison to the pristine titanate nanotubes is a consequence of their improved light-harvesting ability due to the formation of interfacial charge transfer (ICT) complex, as well as the presence of metallic silver nanoparticles that suppress the recombination of photo-generated charge carriers. The spin trapping EPR experiments under irradiation of prepared photocatalysts with either UV or visible light were used to monitor the appearance of hydroxyl radicals and superoxide radical anions. The generation of superoxide radical anions under visible light irradiation was detected for hybrid materials, but not for the pristine titanate nanotubes. These results are a consequence of enhanced promotion ofelectrons to the conduction band due to extended absorption in visible spectral range in hybrids and support the higher efficiency of hydrogen generation observed for surface-modified titanate nanotubes by 5-amino salicylic acid decorated with silver nanoparticles.
T2  - Advanced Powder Technology
T1  - Photocatalytic hydrogen evolution over surface-modified titanate nanotubes by 5-aminosalicylic acid decorated with silver nanoparticles
VL  - 31
IS  - 12
SP  - 4683
EP  - 4690
DO  - 10.1016/j.apt.2020.11.001
ER  - 

@article{
author = "Barbieriková, Zuzana and Lončarević, Davor and Papan, Jelena and Vukoje, Ivana D. and Stoiljković, Milovan and Ahrenkiel, Scott Phillip and Nedeljković, Jovan",
year = "2020",
abstract = "The efficiency of titanate-nanotubes-based photocatalysts towards hydrogen production was studied in the presence of the sacrificial agent, 2-propanol. The highest hydrogen production rate (~120 lmol h 1 g 1 ) was observed over surface-modified titanate nanotubes by 5-amino salicylic acid decorated with nanometer-sized silver nanoparticles. The X-ray diffraction analysis, transmission electron microscopy, nitrogen adsorption–desorption isotherms, and diffuse reflection spectroscopy were applied to characterize the prepared photocatalytic materials. The better photocatalytic performance of inorganic–organic hybrid materials in comparison to the pristine titanate nanotubes is a consequence of their improved light-harvesting ability due to the formation of interfacial charge transfer (ICT) complex, as well as the presence of metallic silver nanoparticles that suppress the recombination of photo-generated charge carriers. The spin trapping EPR experiments under irradiation of prepared photocatalysts with either UV or visible light were used to monitor the appearance of hydroxyl radicals and superoxide radical anions. The generation of superoxide radical anions under visible light irradiation was detected for hybrid materials, but not for the pristine titanate nanotubes. These results are a consequence of enhanced promotion ofelectrons to the conduction band due to extended absorption in visible spectral range in hybrids and support the higher efficiency of hydrogen generation observed for surface-modified titanate nanotubes by 5-amino salicylic acid decorated with silver nanoparticles.",
journal = "Advanced Powder Technology",
title = "Photocatalytic hydrogen evolution over surface-modified titanate nanotubes by 5-aminosalicylic acid decorated with silver nanoparticles",
volume = "31",
number = "12",
pages = "4683-4690",
doi = "10.1016/j.apt.2020.11.001"
}

Barbieriková, Z., Lončarević, D., Papan, J., Vukoje, I. D., Stoiljković, M., Ahrenkiel, S. P.,& Nedeljković, J.. (2020). Photocatalytic hydrogen evolution over surface-modified titanate nanotubes by 5-aminosalicylic acid decorated with silver nanoparticles. in Advanced Powder Technology, 31(12), 4683-4690.
https://doi.org/10.1016/j.apt.2020.11.001

Barbieriková Z, Lončarević D, Papan J, Vukoje ID, Stoiljković M, Ahrenkiel SP, Nedeljković J. Photocatalytic hydrogen evolution over surface-modified titanate nanotubes by 5-aminosalicylic acid decorated with silver nanoparticles. in Advanced Powder Technology. 2020;31(12):4683-4690.
doi:10.1016/j.apt.2020.11.001 .

Barbieriková, Zuzana, Lončarević, Davor, Papan, Jelena, Vukoje, Ivana D., Stoiljković, Milovan, Ahrenkiel, Scott Phillip, Nedeljković, Jovan, "Photocatalytic hydrogen evolution over surface-modified titanate nanotubes by 5-aminosalicylic acid decorated with silver nanoparticles" in Advanced Powder Technology, 31, no. 12 (2020):4683-4690,
https://doi.org/10.1016/j.apt.2020.11.001 . .