Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics

2012
Authors
Stanković, Ana
Stojanović, Zoran S.

Veselinović, Ljiljana

Bračko, Ines
Škapin, Srečo Davor

Marković, Smilja

Uskoković, Dragan

Conference object (Published version)
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ZnO represent one of the most important multifunctional materials. Its properties are well known and confirmed in different application areas such as: gas sensors, UV lasers, solar cells, electroluminescent and optoelectronic devices, piezoelectric transducers, hydrogen-storages, rubber industry and plastic processing, cosmetics and pharmacy, and it is also used as an antibacterial agent. In this work, we propose a low-temperature hydrothermal method for the synthesis of phase-pure ZnO powders with a controlled morphology and narrow particle size distribution. This simple and low-cost method allows tailoring of the shape and size of ZnO particles, from micro-rods via hexagonal prism-like to nano-spheres, by choosing the appropriate pH of the reaction solution, tuned by the varying of [Na+]:[Zn2+] molar ratio. The agglomeration of the powders was prevented with the assistance of PVP as a capping agent. The synthesized powders were characterized by XRD, TEM, SEAD and HRTEM methods to exa...mine the phase purity and crystallinity. FE-SEM measurements were used for the morphology characterization, while the results of Raman and UV-Vis DRS measurements were used for the study of optical properties. The relationship between the particle size and morphology and the optical properties is discussed. Diffuse reflectance spectra of ZnO powders with different size and morphology revealed characteristic R curves with the absorption edge near 380 nm, but with obvious difference in the absorption in the visible region. The micro-sized powder ZnO8 revealed the lowest reflectance (∼70%), compared to submicro- (∼80%) and nano-sized (ZnO12 and ZnO13, ∼90%) powders. Thus, the reflectance of the ZnO powders decreases with the increase in the average particle size.
Keywords:
ZnO / zinc oxide / optical characteristics / hydrothermal synthesisSource:
The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts, 2012, 47-47Publisher:
- Belgrade : Materials Research Society of Serbia
Funding / projects:
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - CONF AU - Stanković, Ana AU - Stojanović, Zoran S. AU - Veselinović, Ljiljana AU - Bračko, Ines AU - Škapin, Srečo Davor AU - Marković, Smilja AU - Uskoković, Dragan PY - 2012 UR - https://dais.sanu.ac.rs/123456789/435 AB - ZnO represent one of the most important multifunctional materials. Its properties are well known and confirmed in different application areas such as: gas sensors, UV lasers, solar cells, electroluminescent and optoelectronic devices, piezoelectric transducers, hydrogen-storages, rubber industry and plastic processing, cosmetics and pharmacy, and it is also used as an antibacterial agent. In this work, we propose a low-temperature hydrothermal method for the synthesis of phase-pure ZnO powders with a controlled morphology and narrow particle size distribution. This simple and low-cost method allows tailoring of the shape and size of ZnO particles, from micro-rods via hexagonal prism-like to nano-spheres, by choosing the appropriate pH of the reaction solution, tuned by the varying of [Na+]:[Zn2+] molar ratio. The agglomeration of the powders was prevented with the assistance of PVP as a capping agent. The synthesized powders were characterized by XRD, TEM, SEAD and HRTEM methods to examine the phase purity and crystallinity. FE-SEM measurements were used for the morphology characterization, while the results of Raman and UV-Vis DRS measurements were used for the study of optical properties. The relationship between the particle size and morphology and the optical properties is discussed. Diffuse reflectance spectra of ZnO powders with different size and morphology revealed characteristic R curves with the absorption edge near 380 nm, but with obvious difference in the absorption in the visible region. The micro-sized powder ZnO8 revealed the lowest reflectance (∼70%), compared to submicro- (∼80%) and nano-sized (ZnO12 and ZnO13, ∼90%) powders. Thus, the reflectance of the ZnO powders decreases with the increase in the average particle size. PB - Belgrade : Materials Research Society of Serbia C3 - The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts T1 - Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics SP - 47 EP - 47 UR - https://hdl.handle.net/21.15107/rcub_dais_435 ER -
@conference{ author = "Stanković, Ana and Stojanović, Zoran S. and Veselinović, Ljiljana and Bračko, Ines and Škapin, Srečo Davor and Marković, Smilja and Uskoković, Dragan", year = "2012", abstract = "ZnO represent one of the most important multifunctional materials. Its properties are well known and confirmed in different application areas such as: gas sensors, UV lasers, solar cells, electroluminescent and optoelectronic devices, piezoelectric transducers, hydrogen-storages, rubber industry and plastic processing, cosmetics and pharmacy, and it is also used as an antibacterial agent. In this work, we propose a low-temperature hydrothermal method for the synthesis of phase-pure ZnO powders with a controlled morphology and narrow particle size distribution. This simple and low-cost method allows tailoring of the shape and size of ZnO particles, from micro-rods via hexagonal prism-like to nano-spheres, by choosing the appropriate pH of the reaction solution, tuned by the varying of [Na+]:[Zn2+] molar ratio. The agglomeration of the powders was prevented with the assistance of PVP as a capping agent. The synthesized powders were characterized by XRD, TEM, SEAD and HRTEM methods to examine the phase purity and crystallinity. FE-SEM measurements were used for the morphology characterization, while the results of Raman and UV-Vis DRS measurements were used for the study of optical properties. The relationship between the particle size and morphology and the optical properties is discussed. Diffuse reflectance spectra of ZnO powders with different size and morphology revealed characteristic R curves with the absorption edge near 380 nm, but with obvious difference in the absorption in the visible region. The micro-sized powder ZnO8 revealed the lowest reflectance (∼70%), compared to submicro- (∼80%) and nano-sized (ZnO12 and ZnO13, ∼90%) powders. Thus, the reflectance of the ZnO powders decreases with the increase in the average particle size.", publisher = "Belgrade : Materials Research Society of Serbia", journal = "The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts", title = "Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics", pages = "47-47", url = "https://hdl.handle.net/21.15107/rcub_dais_435" }
Stanković, A., Stojanović, Z. S., Veselinović, L., Bračko, I., Škapin, S. D., Marković, S.,& Uskoković, D.. (2012). Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts Belgrade : Materials Research Society of Serbia., 47-47. https://hdl.handle.net/21.15107/rcub_dais_435
Stanković A, Stojanović ZS, Veselinović L, Bračko I, Škapin SD, Marković S, Uskoković D. Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts. 2012;:47-47. https://hdl.handle.net/21.15107/rcub_dais_435 .
Stanković, Ana, Stojanović, Zoran S., Veselinović, Ljiljana, Bračko, Ines, Škapin, Srečo Davor, Marković, Smilja, Uskoković, Dragan, "Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics" in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts (2012):47-47, https://hdl.handle.net/21.15107/rcub_dais_435 .