The influence of cationic impurities in silica on its crystallization and point of zero charge
Apstrakt
The influence of the heat treatment on the crystal structure change of five (two laboratory prepared and three commercial) silica powders were investigated. Silicas were heat treated in the temperature range from 150 to 1300 degrees C in air. Also, the influence of the washing procedure with 0.01 mol/L HCl in order to desorb cations present as impurities in silica samples, was studied. The change of the amorphous into the crystal structure (alpha-cristobalite) takes place in the range 1050-1300 degrees C, depending on the chemical purity of silica samples. Points of zero charge, pH(pzc), of the same silica samples, ranging from 3.8 to 7.1, were also determined by batch equilibration method. It is shown that the desorption of cations from silica samples, i.e., increase in their purity, leads to a shift in pH(pzc) toward lower values. (c) 2006 Elsevier Inc. All rights reserved.
Ključne reči:
silica / point of zero charge / XRD / ICP-AES / EDXRFIzvor:
Journal of Colloid and Interface Science, 2007, 309, 1, 155-159
DOI: 10.1016/j.jcis.2006.12.033
ISSN: 0021-9797
PubMed: 17258759
WoS: 000245561200022
Scopus: 2-s2.0-33947386277
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Milonjić, Slobodan K. AU - Čerović, Ljiljana S. AU - Čokeša, Đuro AU - Zec, Slavica PY - 2007 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3183 AB - The influence of the heat treatment on the crystal structure change of five (two laboratory prepared and three commercial) silica powders were investigated. Silicas were heat treated in the temperature range from 150 to 1300 degrees C in air. Also, the influence of the washing procedure with 0.01 mol/L HCl in order to desorb cations present as impurities in silica samples, was studied. The change of the amorphous into the crystal structure (alpha-cristobalite) takes place in the range 1050-1300 degrees C, depending on the chemical purity of silica samples. Points of zero charge, pH(pzc), of the same silica samples, ranging from 3.8 to 7.1, were also determined by batch equilibration method. It is shown that the desorption of cations from silica samples, i.e., increase in their purity, leads to a shift in pH(pzc) toward lower values. (c) 2006 Elsevier Inc. All rights reserved. T2 - Journal of Colloid and Interface Science T1 - The influence of cationic impurities in silica on its crystallization and point of zero charge VL - 309 IS - 1 SP - 155 EP - 159 DO - 10.1016/j.jcis.2006.12.033 ER -
@article{ author = "Milonjić, Slobodan K. and Čerović, Ljiljana S. and Čokeša, Đuro and Zec, Slavica", year = "2007", abstract = "The influence of the heat treatment on the crystal structure change of five (two laboratory prepared and three commercial) silica powders were investigated. Silicas were heat treated in the temperature range from 150 to 1300 degrees C in air. Also, the influence of the washing procedure with 0.01 mol/L HCl in order to desorb cations present as impurities in silica samples, was studied. The change of the amorphous into the crystal structure (alpha-cristobalite) takes place in the range 1050-1300 degrees C, depending on the chemical purity of silica samples. Points of zero charge, pH(pzc), of the same silica samples, ranging from 3.8 to 7.1, were also determined by batch equilibration method. It is shown that the desorption of cations from silica samples, i.e., increase in their purity, leads to a shift in pH(pzc) toward lower values. (c) 2006 Elsevier Inc. All rights reserved.", journal = "Journal of Colloid and Interface Science", title = "The influence of cationic impurities in silica on its crystallization and point of zero charge", volume = "309", number = "1", pages = "155-159", doi = "10.1016/j.jcis.2006.12.033" }
Milonjić, S. K., Čerović, L. S., Čokeša, Đ.,& Zec, S.. (2007). The influence of cationic impurities in silica on its crystallization and point of zero charge. in Journal of Colloid and Interface Science, 309(1), 155-159. https://doi.org/10.1016/j.jcis.2006.12.033
Milonjić SK, Čerović LS, Čokeša Đ, Zec S. The influence of cationic impurities in silica on its crystallization and point of zero charge. in Journal of Colloid and Interface Science. 2007;309(1):155-159. doi:10.1016/j.jcis.2006.12.033 .
Milonjić, Slobodan K., Čerović, Ljiljana S., Čokeša, Đuro, Zec, Slavica, "The influence of cationic impurities in silica on its crystallization and point of zero charge" in Journal of Colloid and Interface Science, 309, no. 1 (2007):155-159, https://doi.org/10.1016/j.jcis.2006.12.033 . .