Morphology and the isoelectric point of nanosized aqueous ceria sols
Апстракт
Ceria sols were synthesized by a forced hydrolysis method using cerium sulphate or cerium nitrate as precursors. High-resolution TEM was used to determine the microstructure and particle size of CeO2. A polycrystalline structure of ceria sols with crystallite sizes of 4.4 and 8.6 nm was obtained. The particles had a well-defined polyhedral shape. Direct bandgaps for ceria nanoparticles were 2.80 and 3.31 eV, respectively. The isoelectric point, pH(iep), of ceria sols in KNO3 solutions was investigated. The isoelectric point of ceria was found to be pH(iep) = 7.6 +/- 0.2. The obtained results indicate that the isoelectric point in the presence of SO42- ions shifts to lower pH value. The particle size of ceria increases with pH, reaching the maximum value at pH(iep) as the result of agglomeration. (C) 2014 Elsevier B.V. All rights reserved.
Кључне речи:
Oxides / Chemical synthesis / Electron microscopy / Surface propertiesИзвор:
Materials Chemistry and Physics, 2014, 148, 3, 868-873Финансирање / пројекти:
- Синтеза, карактеризација и примена колоидних дисперзија неорганских материјала нанометарских величина (RS-142004)
DOI: 10.1016/j.matchemphys.2014.08.063
ISSN: 0254-0584; 1879-3312
WoS: 000344429700055
Scopus: 2-s2.0-84927672227
Колекције
Институција/група
VinčaTY - JOUR AU - Gulicovski, Jelena J. AU - Bracko, Ines AU - Milonjić, Slobodan K. PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/191 AB - Ceria sols were synthesized by a forced hydrolysis method using cerium sulphate or cerium nitrate as precursors. High-resolution TEM was used to determine the microstructure and particle size of CeO2. A polycrystalline structure of ceria sols with crystallite sizes of 4.4 and 8.6 nm was obtained. The particles had a well-defined polyhedral shape. Direct bandgaps for ceria nanoparticles were 2.80 and 3.31 eV, respectively. The isoelectric point, pH(iep), of ceria sols in KNO3 solutions was investigated. The isoelectric point of ceria was found to be pH(iep) = 7.6 +/- 0.2. The obtained results indicate that the isoelectric point in the presence of SO42- ions shifts to lower pH value. The particle size of ceria increases with pH, reaching the maximum value at pH(iep) as the result of agglomeration. (C) 2014 Elsevier B.V. All rights reserved. T2 - Materials Chemistry and Physics T1 - Morphology and the isoelectric point of nanosized aqueous ceria sols VL - 148 IS - 3 SP - 868 EP - 873 DO - 10.1016/j.matchemphys.2014.08.063 ER -
@article{ author = "Gulicovski, Jelena J. and Bracko, Ines and Milonjić, Slobodan K.", year = "2014", abstract = "Ceria sols were synthesized by a forced hydrolysis method using cerium sulphate or cerium nitrate as precursors. High-resolution TEM was used to determine the microstructure and particle size of CeO2. A polycrystalline structure of ceria sols with crystallite sizes of 4.4 and 8.6 nm was obtained. The particles had a well-defined polyhedral shape. Direct bandgaps for ceria nanoparticles were 2.80 and 3.31 eV, respectively. The isoelectric point, pH(iep), of ceria sols in KNO3 solutions was investigated. The isoelectric point of ceria was found to be pH(iep) = 7.6 +/- 0.2. The obtained results indicate that the isoelectric point in the presence of SO42- ions shifts to lower pH value. The particle size of ceria increases with pH, reaching the maximum value at pH(iep) as the result of agglomeration. (C) 2014 Elsevier B.V. All rights reserved.", journal = "Materials Chemistry and Physics", title = "Morphology and the isoelectric point of nanosized aqueous ceria sols", volume = "148", number = "3", pages = "868-873", doi = "10.1016/j.matchemphys.2014.08.063" }
Gulicovski, J. J., Bracko, I.,& Milonjić, S. K.. (2014). Morphology and the isoelectric point of nanosized aqueous ceria sols. in Materials Chemistry and Physics, 148(3), 868-873. https://doi.org/10.1016/j.matchemphys.2014.08.063
Gulicovski JJ, Bracko I, Milonjić SK. Morphology and the isoelectric point of nanosized aqueous ceria sols. in Materials Chemistry and Physics. 2014;148(3):868-873. doi:10.1016/j.matchemphys.2014.08.063 .
Gulicovski, Jelena J., Bracko, Ines, Milonjić, Slobodan K., "Morphology and the isoelectric point of nanosized aqueous ceria sols" in Materials Chemistry and Physics, 148, no. 3 (2014):868-873, https://doi.org/10.1016/j.matchemphys.2014.08.063 . .