Surface modification of sol-gel synthesized TiO2 nanoparticles induced by La-doping
Nema prikaza
Autori
Grujić-Brojčin, MirjanaArmaković, Sanja J.
Tomić, Nataša
Abramović, Biljana F.
Golubavic, A.
Stojadinovic, B.
Kremenović, Aleksandar S.
Babić, Biljana M.
Dohcevic-Mitrovic, Z.
Šćepanović, Maja
Članak u časopisu
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
The influence of La-doping in the range of 0.5-6.0 mol% on structural and morphological properties of TiO2 nanopowders synthesized by sol-gel routine has been investigated by XRPD, AFM, EDS and BET measurements, as well as Raman spectroscopy. The XRPD and Raman measurements have revealed the anatase phase as dominant in all nanopowders, with crystallite size decreasing from similar to 15 nm in pure TiO2 to similar to 12 nm in La-doped samples. The BET data suggest that all samples are fully mesoporous, with mean pore diameters in the range of similar to 6-8 nm. The specific surface area and the complexity of pore structure are greater in doped samples than in pure TiO2 sample. The spectroscopic ellipsometry has apparently shown that the band gap has been gradually increased with the increase of La content. The STM and STS techniques have been used successfully to evaluate the surface morphology and electronic properties of La-doped nanopowders. All investigated properties have been rel...ated to photocatalytic activity, tested in degradation of a metoprolol tartrate salt (0.05 mM), and induced by UV-radiation. All doped samples showed increased photocatalytic activity compared to pure TiO2, among which the 0.65 mol% La-doped sample appeared to be the most efficient. (C) 2013 Elsevier Inc. All rights reserved.
Ključne reči:
TiO2 nanopowder / La-doping / STM/STS / Optical spectroscopy / PhotocatalysisIzvor:
Materials Characterization, 2014, 88, 30-41Finansiranje / projekti:
- Nanostrukturni multifunkcionalni materijali i nanokompoziti (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45018)
- Fizika nanostrukturnih oksidnih materijala i jako korelisanih sistema (RS-MESTD-Basic Research (BR or ON)-171032)
- Razvoj metoda praćenja i uklanjanja biološki aktivnih supstanci u cilju unapređenja kvaliteta životne sredine (RS-MESTD-Basic Research (BR or ON)-172042)
- SASA Project [F-134]
DOI: 10.1016/j.matchar.2013.12.002
ISSN: 1044-5803; 1873-4189
WoS: 000331413200005
Scopus: 2-s2.0-84891433452
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Grujić-Brojčin, Mirjana AU - Armaković, Sanja J. AU - Tomić, Nataša AU - Abramović, Biljana F. AU - Golubavic, A. AU - Stojadinovic, B. AU - Kremenović, Aleksandar S. AU - Babić, Biljana M. AU - Dohcevic-Mitrovic, Z. AU - Šćepanović, Maja PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5881 AB - The influence of La-doping in the range of 0.5-6.0 mol% on structural and morphological properties of TiO2 nanopowders synthesized by sol-gel routine has been investigated by XRPD, AFM, EDS and BET measurements, as well as Raman spectroscopy. The XRPD and Raman measurements have revealed the anatase phase as dominant in all nanopowders, with crystallite size decreasing from similar to 15 nm in pure TiO2 to similar to 12 nm in La-doped samples. The BET data suggest that all samples are fully mesoporous, with mean pore diameters in the range of similar to 6-8 nm. The specific surface area and the complexity of pore structure are greater in doped samples than in pure TiO2 sample. The spectroscopic ellipsometry has apparently shown that the band gap has been gradually increased with the increase of La content. The STM and STS techniques have been used successfully to evaluate the surface morphology and electronic properties of La-doped nanopowders. All investigated properties have been related to photocatalytic activity, tested in degradation of a metoprolol tartrate salt (0.05 mM), and induced by UV-radiation. All doped samples showed increased photocatalytic activity compared to pure TiO2, among which the 0.65 mol% La-doped sample appeared to be the most efficient. (C) 2013 Elsevier Inc. All rights reserved. T2 - Materials Characterization T1 - Surface modification of sol-gel synthesized TiO2 nanoparticles induced by La-doping VL - 88 SP - 30 EP - 41 DO - 10.1016/j.matchar.2013.12.002 ER -
@article{ author = "Grujić-Brojčin, Mirjana and Armaković, Sanja J. and Tomić, Nataša and Abramović, Biljana F. and Golubavic, A. and Stojadinovic, B. and Kremenović, Aleksandar S. and Babić, Biljana M. and Dohcevic-Mitrovic, Z. and Šćepanović, Maja", year = "2014", abstract = "The influence of La-doping in the range of 0.5-6.0 mol% on structural and morphological properties of TiO2 nanopowders synthesized by sol-gel routine has been investigated by XRPD, AFM, EDS and BET measurements, as well as Raman spectroscopy. The XRPD and Raman measurements have revealed the anatase phase as dominant in all nanopowders, with crystallite size decreasing from similar to 15 nm in pure TiO2 to similar to 12 nm in La-doped samples. The BET data suggest that all samples are fully mesoporous, with mean pore diameters in the range of similar to 6-8 nm. The specific surface area and the complexity of pore structure are greater in doped samples than in pure TiO2 sample. The spectroscopic ellipsometry has apparently shown that the band gap has been gradually increased with the increase of La content. The STM and STS techniques have been used successfully to evaluate the surface morphology and electronic properties of La-doped nanopowders. All investigated properties have been related to photocatalytic activity, tested in degradation of a metoprolol tartrate salt (0.05 mM), and induced by UV-radiation. All doped samples showed increased photocatalytic activity compared to pure TiO2, among which the 0.65 mol% La-doped sample appeared to be the most efficient. (C) 2013 Elsevier Inc. All rights reserved.", journal = "Materials Characterization", title = "Surface modification of sol-gel synthesized TiO2 nanoparticles induced by La-doping", volume = "88", pages = "30-41", doi = "10.1016/j.matchar.2013.12.002" }
Grujić-Brojčin, M., Armaković, S. J., Tomić, N., Abramović, B. F., Golubavic, A., Stojadinovic, B., Kremenović, A. S., Babić, B. M., Dohcevic-Mitrovic, Z.,& Šćepanović, M.. (2014). Surface modification of sol-gel synthesized TiO2 nanoparticles induced by La-doping. in Materials Characterization, 88, 30-41. https://doi.org/10.1016/j.matchar.2013.12.002
Grujić-Brojčin M, Armaković SJ, Tomić N, Abramović BF, Golubavic A, Stojadinovic B, Kremenović AS, Babić BM, Dohcevic-Mitrovic Z, Šćepanović M. Surface modification of sol-gel synthesized TiO2 nanoparticles induced by La-doping. in Materials Characterization. 2014;88:30-41. doi:10.1016/j.matchar.2013.12.002 .
Grujić-Brojčin, Mirjana, Armaković, Sanja J., Tomić, Nataša, Abramović, Biljana F., Golubavic, A., Stojadinovic, B., Kremenović, Aleksandar S., Babić, Biljana M., Dohcevic-Mitrovic, Z., Šćepanović, Maja, "Surface modification of sol-gel synthesized TiO2 nanoparticles induced by La-doping" in Materials Characterization, 88 (2014):30-41, https://doi.org/10.1016/j.matchar.2013.12.002 . .