Speciation and crystal chemistry of Iron(III) chloride hydrolyzed in the presence of SiO{sub 4} ligands. 1. An Fe K-edge EXAFS study
Abstract
The hydrolysis of Fe-Si systems with Si/Fe ratios between 0 and 4 leads to the formation of poorly crystalline or, more frequently, of long-range disorganized precipitates. The increase of Si/Fe molar ratios results in a dramatic change of Fe polymerization. The formation of double and single corner-sharing Fe linkages is reduced compared to pure Fe hydrolysis products. The growth regime depends on the Si concentration in the system. Three-dimensional and two-dimensional growth of Fe colloids occurs at low and high Si/Fe ratios, respectively, systems with Si/Fe ratios around 1 representing a crossover between these two regimes. Though Si neighbors cannot be detected unequivocally by Fe K-edge EXAFS, their presence in the close environment of Fe atoms is evident from the change in Fe speciation.
- Authors:
- Publication Date:
- Research Org.:
- CNRS-Aix-Marseille III, Aix-en-Provence (FR)
- Sponsoring Org.:
- National Science Foundation (NSF); USDOE
- OSTI Identifier:
- 20080280
- DOE Contract Number:
- FC09-96SR18546
- Resource Type:
- Journal Article
- Journal Name:
- Langmuir
- Additional Journal Information:
- Journal Volume: 16; Journal Issue: 10; Other Information: PBD: 16 May 2000; Journal ID: ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; IRON CHLORIDES; HYDROLYSIS; SILICON OXIDES; LIGANDS; ENVIRONMENTAL TRANSPORT; ADSORPTION
Citation Formats
Doelsch, E, Rose, J, Masion, A, Bottero, J Y, Nahon, D, and Bertsch, P M. Speciation and crystal chemistry of Iron(III) chloride hydrolyzed in the presence of SiO{sub 4} ligands. 1. An Fe K-edge EXAFS study. United States: N. p., 2000.
Web. doi:10.1021/la991378h.
Doelsch, E, Rose, J, Masion, A, Bottero, J Y, Nahon, D, & Bertsch, P M. Speciation and crystal chemistry of Iron(III) chloride hydrolyzed in the presence of SiO{sub 4} ligands. 1. An Fe K-edge EXAFS study. United States. https://doi.org/10.1021/la991378h
Doelsch, E, Rose, J, Masion, A, Bottero, J Y, Nahon, D, and Bertsch, P M. 2000.
"Speciation and crystal chemistry of Iron(III) chloride hydrolyzed in the presence of SiO{sub 4} ligands. 1. An Fe K-edge EXAFS study". United States. https://doi.org/10.1021/la991378h.
@article{osti_20080280,
title = {Speciation and crystal chemistry of Iron(III) chloride hydrolyzed in the presence of SiO{sub 4} ligands. 1. An Fe K-edge EXAFS study},
author = {Doelsch, E and Rose, J and Masion, A and Bottero, J Y and Nahon, D and Bertsch, P M},
abstractNote = {The hydrolysis of Fe-Si systems with Si/Fe ratios between 0 and 4 leads to the formation of poorly crystalline or, more frequently, of long-range disorganized precipitates. The increase of Si/Fe molar ratios results in a dramatic change of Fe polymerization. The formation of double and single corner-sharing Fe linkages is reduced compared to pure Fe hydrolysis products. The growth regime depends on the Si concentration in the system. Three-dimensional and two-dimensional growth of Fe colloids occurs at low and high Si/Fe ratios, respectively, systems with Si/Fe ratios around 1 representing a crossover between these two regimes. Though Si neighbors cannot be detected unequivocally by Fe K-edge EXAFS, their presence in the close environment of Fe atoms is evident from the change in Fe speciation.},
doi = {10.1021/la991378h},
url = {https://www.osti.gov/biblio/20080280},
journal = {Langmuir},
issn = {0743-7463},
number = 10,
volume = 16,
place = {United States},
year = {Tue May 16 00:00:00 EDT 2000},
month = {Tue May 16 00:00:00 EDT 2000}
}