Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles
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2012
Authors
Validžić, Ivana Lj.Savić, Tatjana D.
Krsmanović, Radenka
Jovanović, Dragana J.
Novaković, Mirjana M.
Popović, Maja
Čomor, Mirjana
Article (Published version)
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Zinc oxide (ZnO)/zinc tungstate (ZnWO4) rod-like nanoparticles with diameters in the range of 6-11 nm and length of about 30 nm were synthesized by a low temperature soft solution method at 95-C in the presence of non-ionic copolymer surfactant. It was found that their crystallinity was enhanced with the increase of heating time from 1 h up to 120h. The photoluminescence (PL) measurements showed very strong, narrow UV band peaked at 3.30 eV and a broad visible band peaking at 2.71 eV with a shoulder at about 2.53 eV, for lambda(exc) LT 300 nm. Quite large variations in the intensities of the two PL bands were observed for different excitation wavelengths. The intensity of the main visible band decreases with decreasing excitation energy and disappears when samples are excited lambda = 320 nm (E-exc = 3.875 eV). We found that observed optical properties originate from ZnO phase. UV band gap PL had high intensity for all applied excitations, probably induced by ZnWO4 phase presence on th...e surface. In addition, two values were found for direct band-gap energy of ZnO/ZnWO4 rod-like nanoparticles 3.62 and 3.21 eV, determined from reflectance spectrum. The photocatalytic behaviour of ZnO is strongly dependent on the formation of ZnWO4 phase, of the obtained rod-like nanoparticles. (C) 2012 Elsevier B.V. All rights reserved.
Keywords:
Inorganic materials / Chemical synthesis / Photoluminescence spectra / Optical properties / X-ray diffractionSource:
Materials Science and Engineering. B: Advanced Functional Solid-State Materials, 2012, 177, 9, 645-651Publisher:
- Elsevier
Funding / projects:
- Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites (RS-MESTD-Basic Research (BR or ON)-172056)
- Functional, Functionalized and Advanced Nanomaterials (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45005)
DOI: 10.1016/j.mseb.2012.03.044
ISSN: 0921-5107
WoS: 000304296600002
Scopus: 2-s2.0-84860245278
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VinčaTY - JOUR AU - Validžić, Ivana Lj. AU - Savić, Tatjana D. AU - Krsmanović, Radenka AU - Jovanović, Dragana J. AU - Novaković, Mirjana M. AU - Popović, Maja AU - Čomor, Mirjana PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4857 AB - Zinc oxide (ZnO)/zinc tungstate (ZnWO4) rod-like nanoparticles with diameters in the range of 6-11 nm and length of about 30 nm were synthesized by a low temperature soft solution method at 95-C in the presence of non-ionic copolymer surfactant. It was found that their crystallinity was enhanced with the increase of heating time from 1 h up to 120h. The photoluminescence (PL) measurements showed very strong, narrow UV band peaked at 3.30 eV and a broad visible band peaking at 2.71 eV with a shoulder at about 2.53 eV, for lambda(exc) LT 300 nm. Quite large variations in the intensities of the two PL bands were observed for different excitation wavelengths. The intensity of the main visible band decreases with decreasing excitation energy and disappears when samples are excited lambda = 320 nm (E-exc = 3.875 eV). We found that observed optical properties originate from ZnO phase. UV band gap PL had high intensity for all applied excitations, probably induced by ZnWO4 phase presence on the surface. In addition, two values were found for direct band-gap energy of ZnO/ZnWO4 rod-like nanoparticles 3.62 and 3.21 eV, determined from reflectance spectrum. The photocatalytic behaviour of ZnO is strongly dependent on the formation of ZnWO4 phase, of the obtained rod-like nanoparticles. (C) 2012 Elsevier B.V. All rights reserved. PB - Elsevier T2 - Materials Science and Engineering. B: Advanced Functional Solid-State Materials T1 - Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles VL - 177 IS - 9 SP - 645 EP - 651 DO - 10.1016/j.mseb.2012.03.044 ER -
@article{ author = "Validžić, Ivana Lj. and Savić, Tatjana D. and Krsmanović, Radenka and Jovanović, Dragana J. and Novaković, Mirjana M. and Popović, Maja and Čomor, Mirjana", year = "2012", abstract = "Zinc oxide (ZnO)/zinc tungstate (ZnWO4) rod-like nanoparticles with diameters in the range of 6-11 nm and length of about 30 nm were synthesized by a low temperature soft solution method at 95-C in the presence of non-ionic copolymer surfactant. It was found that their crystallinity was enhanced with the increase of heating time from 1 h up to 120h. The photoluminescence (PL) measurements showed very strong, narrow UV band peaked at 3.30 eV and a broad visible band peaking at 2.71 eV with a shoulder at about 2.53 eV, for lambda(exc) LT 300 nm. Quite large variations in the intensities of the two PL bands were observed for different excitation wavelengths. The intensity of the main visible band decreases with decreasing excitation energy and disappears when samples are excited lambda = 320 nm (E-exc = 3.875 eV). We found that observed optical properties originate from ZnO phase. UV band gap PL had high intensity for all applied excitations, probably induced by ZnWO4 phase presence on the surface. In addition, two values were found for direct band-gap energy of ZnO/ZnWO4 rod-like nanoparticles 3.62 and 3.21 eV, determined from reflectance spectrum. The photocatalytic behaviour of ZnO is strongly dependent on the formation of ZnWO4 phase, of the obtained rod-like nanoparticles. (C) 2012 Elsevier B.V. All rights reserved.", publisher = "Elsevier", journal = "Materials Science and Engineering. B: Advanced Functional Solid-State Materials", title = "Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles", volume = "177", number = "9", pages = "645-651", doi = "10.1016/j.mseb.2012.03.044" }
Validžić, I. Lj., Savić, T. D., Krsmanović, R., Jovanović, D. J., Novaković, M. M., Popović, M.,& Čomor, M.. (2012). Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles. in Materials Science and Engineering. B: Advanced Functional Solid-State Materials Elsevier., 177(9), 645-651. https://doi.org/10.1016/j.mseb.2012.03.044
Validžić IL, Savić TD, Krsmanović R, Jovanović DJ, Novaković MM, Popović M, Čomor M. Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles. in Materials Science and Engineering. B: Advanced Functional Solid-State Materials. 2012;177(9):645-651. doi:10.1016/j.mseb.2012.03.044 .
Validžić, Ivana Lj., Savić, Tatjana D., Krsmanović, Radenka, Jovanović, Dragana J., Novaković, Mirjana M., Popović, Maja, Čomor, Mirjana, "Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles" in Materials Science and Engineering. B: Advanced Functional Solid-State Materials, 177, no. 9 (2012):645-651, https://doi.org/10.1016/j.mseb.2012.03.044 . .