Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots
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2015
Authors
Bjelajac, AnđelikaPetrović, Rada
Nedeljković, Jovan M.
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Djokic, Veljko
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Radetic, Tamara
Ćirković, Jovana
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Janacković, Đorđe
Article (Published version)
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Ordered titania nanotubes (pore diameter approximate to 90 nm and wall thickness approximate to 10 nm) were obtained by the anodization technique and used for the ex-situ deposition of cadmium sulfide quantum dots (CdS QDs) via simple immersion of titania substrates in the CdS colloid. The colloidal dispersion of CdS nanoparticles in water was obtained in the presence of the bifunctional ligand, mercapto silane, which binds to the surface of CdS providing stability to the colloid and preventing further growth of the synthesized nanoparticles. The blue-shift of the optical absorption indicated that the CdS nanoparticles were of quantum dot size. Using the effective mass model, the average particle size was calculated to be 5.4 nm. Transmission electron microscopy provided the verification for the estimated size of the nanoparticles, which was followed by performing selected area electron diffraction to determine the mixed phase (cubic and hexagonal) of the synthesized CdS QDs. Scanning ...electron microscopy and reflectance spectroscopy were employed to characterize the nanostructures consisting of TiO2 nanotubes with different loadings of CdS QDs (after 24 h and 72 h immersion). It was demonstrated that mercapto silane efficiently binds CdS QDs onto TiO2 nanotubes enabling Visible-light response of the obtained nanocomposites.
Keywords:
TiO2 / Optical properties / Nanocomposites / Electron microscopySource:
Ceramics International, 2015, 41, 5, 7048-7053Publisher:
- Elsevier Sci Ltd, Oxford
Funding / projects:
- Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45019)
DOI: 10.1016/j.ceramint.2015.02.010
ISSN: 0272-8842
WoS: 000353176400051
Scopus: 2-s2.0-84925125540
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Institut za multidisciplinarna istraživanjaTY - JOUR AU - Bjelajac, Anđelika AU - Petrović, Rada AU - Nedeljković, Jovan M. AU - Djokic, Veljko AU - Radetic, Tamara AU - Ćirković, Jovana AU - Janacković, Đorđe PY - 2015 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/919 AB - Ordered titania nanotubes (pore diameter approximate to 90 nm and wall thickness approximate to 10 nm) were obtained by the anodization technique and used for the ex-situ deposition of cadmium sulfide quantum dots (CdS QDs) via simple immersion of titania substrates in the CdS colloid. The colloidal dispersion of CdS nanoparticles in water was obtained in the presence of the bifunctional ligand, mercapto silane, which binds to the surface of CdS providing stability to the colloid and preventing further growth of the synthesized nanoparticles. The blue-shift of the optical absorption indicated that the CdS nanoparticles were of quantum dot size. Using the effective mass model, the average particle size was calculated to be 5.4 nm. Transmission electron microscopy provided the verification for the estimated size of the nanoparticles, which was followed by performing selected area electron diffraction to determine the mixed phase (cubic and hexagonal) of the synthesized CdS QDs. Scanning electron microscopy and reflectance spectroscopy were employed to characterize the nanostructures consisting of TiO2 nanotubes with different loadings of CdS QDs (after 24 h and 72 h immersion). It was demonstrated that mercapto silane efficiently binds CdS QDs onto TiO2 nanotubes enabling Visible-light response of the obtained nanocomposites. PB - Elsevier Sci Ltd, Oxford T2 - Ceramics International T1 - Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots EP - 7053 IS - 5 SP - 7048 VL - 41 DO - 10.1016/j.ceramint.2015.02.010 ER -
@article{ author = "Bjelajac, Anđelika and Petrović, Rada and Nedeljković, Jovan M. and Djokic, Veljko and Radetic, Tamara and Ćirković, Jovana and Janacković, Đorđe", year = "2015", abstract = "Ordered titania nanotubes (pore diameter approximate to 90 nm and wall thickness approximate to 10 nm) were obtained by the anodization technique and used for the ex-situ deposition of cadmium sulfide quantum dots (CdS QDs) via simple immersion of titania substrates in the CdS colloid. The colloidal dispersion of CdS nanoparticles in water was obtained in the presence of the bifunctional ligand, mercapto silane, which binds to the surface of CdS providing stability to the colloid and preventing further growth of the synthesized nanoparticles. The blue-shift of the optical absorption indicated that the CdS nanoparticles were of quantum dot size. Using the effective mass model, the average particle size was calculated to be 5.4 nm. Transmission electron microscopy provided the verification for the estimated size of the nanoparticles, which was followed by performing selected area electron diffraction to determine the mixed phase (cubic and hexagonal) of the synthesized CdS QDs. Scanning electron microscopy and reflectance spectroscopy were employed to characterize the nanostructures consisting of TiO2 nanotubes with different loadings of CdS QDs (after 24 h and 72 h immersion). It was demonstrated that mercapto silane efficiently binds CdS QDs onto TiO2 nanotubes enabling Visible-light response of the obtained nanocomposites.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Ceramics International", title = "Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots", pages = "7053-7048", number = "5", volume = "41", doi = "10.1016/j.ceramint.2015.02.010" }
Bjelajac, A., Petrović, R., Nedeljković, J. M., Djokic, V., Radetic, T., Ćirković, J.,& Janacković, Đ.. (2015). Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots. in Ceramics International Elsevier Sci Ltd, Oxford., 41(5), 7048-7053. https://doi.org/10.1016/j.ceramint.2015.02.010
Bjelajac A, Petrović R, Nedeljković JM, Djokic V, Radetic T, Ćirković J, Janacković Đ. Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots. in Ceramics International. 2015;41(5):7048-7053. doi:10.1016/j.ceramint.2015.02.010 .
Bjelajac, Anđelika, Petrović, Rada, Nedeljković, Jovan M., Djokic, Veljko, Radetic, Tamara, Ćirković, Jovana, Janacković, Đorđe, "Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots" in Ceramics International, 41, no. 5 (2015):7048-7053, https://doi.org/10.1016/j.ceramint.2015.02.010 . .