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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.2c02081
|2 doi
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|a pubmed24n1163.xml
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|a DE-627
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|e rakwb
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| 041 |
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|a eng
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| 100 |
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|a Kobayashi, Taishi
|e verfasserin
|4 aut
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|a Structural Approach to Understanding the Formation of Amorphous Metal Hydroxides
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 06.12.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a This study investigates the formation of amorphous tetravalent metal hydroxides, M(OH)4, based on the structural analysis by small- and wide-angle X-ray scattering (SWAXS) and on the electrical potential charge near the surface of M(OH)4 particles. The amorphous zirconium hydroxide solid phases that aged in NaCl and CaCl2 solutions at 25 °C exhibited a hierarchical structure consisting of primary particles of a few nanometers in size and their aggregates more than 100 nm in size. The SWAXS profiles suggested that the size of the primary particles depends on the ionic strength and electrolytes in the sample solutions. The smaller size of the primary particles observed in solutions with higher ionic strength can be explained by the thinner electrical double layer. Additionally, we focused on the ζ potentials of M(OH)4 suspensions in NaCl, NaNO3, and CaCl2 solutions. With the aid of reference systems of metal oxides, MO2, it was found that the ζ potentials were well interpreted by a traditional surface ionization and complexation model, and the size distributions of large aggregates were explained by the classical Derjaguin-Landau-Verwey-Overbeek (DLVO) theory with the ζ potential values. The present study suggests the formation mechanism of amorphous metal hydroxides through a combination of structural analysis and investigation of electrical potentials
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|a Journal Article
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|a Fushimi, Tomokazu
|e verfasserin
|4 aut
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|a Mizukoshi, Hirofumi
|e verfasserin
|4 aut
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| 700 |
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|a Motokawa, Ryuhei
|e verfasserin
|4 aut
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| 700 |
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|a Sasaki, Takayuki
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 38(2022), 48 vom: 06. Dez., Seite 14656-14665
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|x 1520-5827
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|g volume:38
|g year:2022
|g number:48
|g day:06
|g month:12
|g pages:14656-14665
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|u http://dx.doi.org/10.1021/acs.langmuir.2c02081
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