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Examination of the doping effects of samarium (Sm3+) and zirconium (Zr4+) on the photocatalytic activity of TiO2 nanofibers

Authorized Users Only
2023
Authors
Ahmetović, Sanita
Vasiljević, Zorka Z
Rajić, Vladimir
Bartolić, Dragana
Novaković, Mirjana
Tadić, Nenad B.
Cvjetićanin, Nikola
Nikolić, Maria Vesna
Article (Accepted Version)
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Abstract
Pure and samarium (Sm3+) - or zirconium (Zr4+)-doped TiO2 nanofibers were synthesized by electro- spinning method followed by calcination at 500 °C for 1 h. As-spun fibers were smooth, straight and continuous, whilst EDS analysis confirmed the fiber composition and incorporation of dopants in the fibers. Doping with Sm3+ and Zr4+ greatly inhibited the phase transformation of anatase to rutile, by surrounding of Sm3+ ions through formation of Ti-O-Sm bonds and by replacement of Ti4+ ions with larger Zr4+ ions. This was confirmed by HRTEM and SAED analysis. The size of nanofibers was determined to be 133 nm, 175 nm and 155 nm for pure, (0.5%)Sm3+:TiO2 and (1%)Zr4+:TiO2, respectively. After cal- cination, TiO2 crystal lattice with interplanar spacing of 0.353 nm of (101) crystal plane was not significantly disturbed by Sm doping whilst crystal lattice spacing of 0.357 nm of (101) planes of anatase phase in case TiO2:1.0%Zr4+, significan...tly differs from the value of pure TiO2 (0.352 nm), thus implying that Zr was doped into substitutional sites of the TiO2 lattice. The indirect band gaps were calculated to be in the range 3.07–3.24 eV. TiO2:0.5%Sm3+ and TiO2:1.0%Zr4+ exhibited higher specific surface area, of 47.1 and 59.4 m2/g, respectively, than pure TiO2 fibers (19.7 m2/g). Effects of Sm3+ and Zr4+ dopant content on the photodegradation efficiency of methylene blue (MB) were studied. TiO2:0.5%Sm3+ and TiO2:1.0%Zr4+ nanofibers have shown the highest photocatalytic activity of 97% and 98% with constant rates 0.01768 min−1 and 0.01939 min−1, respectively, within180 min irradiation under visible light.

Keywords:
TiO2:Sm3+ / TiO2:Zr4+ / electrospinning / photocatalysis
Source:
Journal of Alloys and Compounds, 2023, 930, 167423-
Publisher:
  • Elsevier
Funding / projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200053 (University of Belgrade, Institute for Multidisciplinary Research) (RS-200053)
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200017 (University of Belgrade, Institute of Nuclear Sciences 'Vinča', Belgrade-Vinča) (RS-200017)
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200146 (University of Belgrade, Faculty of Physical Chemistry) (RS-200146)
Note:
  • This is the peered review of the paper: Ahmetović, S., Vasiljevic, Z. Z., Rajić, V., Bartolić, D., Novaković, M., Tadić, N. B., Cvjetićanin, N.,& Nikolic, M.. (2023). Examination of the doping effects of samarium (Sm3+) and zirconium (Zr4+) on the photocatalytic activity of TiO2 nanofibers. in Journal of Alloys and Compounds Elsevier., 930, 167423. https://doi.org/10.1016/j.jallcom.2022.167423

DOI: 10.1016/j.jallcom.2022.167423

ISSN: 0925-8388 (Print); 1873-4669 (Online)

[ Google Scholar ]
URI
http://rimsi.imsi.bg.ac.rs/handle/123456789/1578
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Institut za multidisciplinarna istraživanja
TY  - JOUR
AU  - Ahmetović, Sanita
AU  - Vasiljević, Zorka Z
AU  - Rajić, Vladimir
AU  - Bartolić, Dragana
AU  - Novaković, Mirjana
AU  - Tadić, Nenad B.
AU  - Cvjetićanin, Nikola
AU  - Nikolić, Maria Vesna
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1578
AB  - Pure and samarium (Sm3+) - or zirconium (Zr4+)-doped TiO2 nanofibers were synthesized by  electro- 
spinning method followed by calcination at 500 °C for 1 h. As-spun fibers were smooth, straight and 
continuous, whilst EDS analysis confirmed the fiber composition and incorporation  of  dopants  in  
the  fibers. Doping with Sm3+ and Zr4+ greatly inhibited the phase transformation of anatase to 
rutile, by surrounding of Sm3+ ions through formation of Ti-O-Sm bonds  and  by  replacement  of  
Ti4+  ions  with  larger Zr4+ ions. This was confirmed by HRTEM and SAED analysis. The size of 
nanofibers was determined to be 133 nm, 175 nm and 155 nm for pure, (0.5%)Sm3+:TiO2 and 
(1%)Zr4+:TiO2, respectively. After  cal- cination, TiO2 crystal lattice with interplanar spacing of 
0.353 nm of (101) crystal  plane  was not  significantly disturbed by Sm doping whilst  crystal  
lattice  spacing  of  0.357  nm  of  (101)  planes  of anatase  phase  in  case  TiO2:1.0%Zr4+,  
significantly  differs  from  the  value  of  pure  TiO2   (0.352  nm),  thus implying that Zr was 
doped into substitutional  sites  of  the  TiO2  lattice.  The  indirect  band  gaps  were 
calculated to be in the range  3.07–3.24  eV.  TiO2:0.5%Sm3+ and  TiO2:1.0%Zr4+ exhibited  higher  
specific surface area, of 47.1  and 59.4 m2/g, respectively, than pure TiO2  fibers (19.7 m2/g). 
Effects of Sm3+ and Zr4+ dopant content on the photodegradation efficiency of methylene blue (MB) 
were studied. TiO2:0.5%Sm3+ and TiO2:1.0%Zr4+ nanofibers have shown  the  highest  photocatalytic  
activity  of  97%  and 98%  with  constant  rates  0.01768  min−1  and  0.01939  min−1,  
respectively,  within180  min irradiation under
visible light.
PB  - Elsevier
T2  - Journal of Alloys and Compounds
T1  - Examination of the doping effects of samarium (Sm3+) and zirconium (Zr4+) on the photocatalytic  activity of TiO2  nanofibers
SP  - 167423
VL  - 930
DO  - 10.1016/j.jallcom.2022.167423
ER  - 
@article{
author = "Ahmetović, Sanita and Vasiljević, Zorka Z and Rajić, Vladimir and Bartolić, Dragana and Novaković, Mirjana and Tadić, Nenad B. and Cvjetićanin, Nikola and Nikolić, Maria Vesna",
year = "2023",
abstract = "Pure and samarium (Sm3+) - or zirconium (Zr4+)-doped TiO2 nanofibers were synthesized by  electro- 
spinning method followed by calcination at 500 °C for 1 h. As-spun fibers were smooth, straight and 
continuous, whilst EDS analysis confirmed the fiber composition and incorporation  of  dopants  in  
the  fibers. Doping with Sm3+ and Zr4+ greatly inhibited the phase transformation of anatase to 
rutile, by surrounding of Sm3+ ions through formation of Ti-O-Sm bonds  and  by  replacement  of  
Ti4+  ions  with  larger Zr4+ ions. This was confirmed by HRTEM and SAED analysis. The size of 
nanofibers was determined to be 133 nm, 175 nm and 155 nm for pure, (0.5%)Sm3+:TiO2 and 
(1%)Zr4+:TiO2, respectively. After  cal- cination, TiO2 crystal lattice with interplanar spacing of 
0.353 nm of (101) crystal  plane  was not  significantly disturbed by Sm doping whilst  crystal  
lattice  spacing  of  0.357  nm  of  (101)  planes  of anatase  phase  in  case  TiO2:1.0%Zr4+,  
significantly  differs  from  the  value  of  pure  TiO2   (0.352  nm),  thus implying that Zr was 
doped into substitutional  sites  of  the  TiO2  lattice.  The  indirect  band  gaps  were 
calculated to be in the range  3.07–3.24  eV.  TiO2:0.5%Sm3+ and  TiO2:1.0%Zr4+ exhibited  higher  
specific surface area, of 47.1  and 59.4 m2/g, respectively, than pure TiO2  fibers (19.7 m2/g). 
Effects of Sm3+ and Zr4+ dopant content on the photodegradation efficiency of methylene blue (MB) 
were studied. TiO2:0.5%Sm3+ and TiO2:1.0%Zr4+ nanofibers have shown  the  highest  photocatalytic  
activity  of  97%  and 98%  with  constant  rates  0.01768  min−1  and  0.01939  min−1,  
respectively,  within180  min irradiation under
visible light.",
publisher = "Elsevier",
journal = "Journal of Alloys and Compounds",
title = "Examination of the doping effects of samarium (Sm3+) and zirconium (Zr4+) on the photocatalytic  activity of TiO2  nanofibers",
pages = "167423",
volume = "930",
doi = "10.1016/j.jallcom.2022.167423"
}
Ahmetović, S., Vasiljević, Z. Z., Rajić, V., Bartolić, D., Novaković, M., Tadić, N. B., Cvjetićanin, N.,& Nikolić, M. V.. (2023). Examination of the doping effects of samarium (Sm3+) and zirconium (Zr4+) on the photocatalytic  activity of TiO2  nanofibers. in Journal of Alloys and Compounds
Elsevier., 930, 167423.
https://doi.org/10.1016/j.jallcom.2022.167423
Ahmetović S, Vasiljević ZZ, Rajić V, Bartolić D, Novaković M, Tadić NB, Cvjetićanin N, Nikolić MV. Examination of the doping effects of samarium (Sm3+) and zirconium (Zr4+) on the photocatalytic  activity of TiO2  nanofibers. in Journal of Alloys and Compounds. 2023;930:167423.
doi:10.1016/j.jallcom.2022.167423 .
Ahmetović, Sanita, Vasiljević, Zorka Z, Rajić, Vladimir, Bartolić, Dragana, Novaković, Mirjana, Tadić, Nenad B., Cvjetićanin, Nikola, Nikolić, Maria Vesna, "Examination of the doping effects of samarium (Sm3+) and zirconium (Zr4+) on the photocatalytic  activity of TiO2  nanofibers" in Journal of Alloys and Compounds, 930 (2023):167423,
https://doi.org/10.1016/j.jallcom.2022.167423 . .

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