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Title: Novel Synthesis and Structural Analysis of Ferrihydrite

Abstract

Naturally occurring ferrihydrite is both impure and difficult to isolate, so the numerous applications and interesting properties of ferrihydrite have spurred the development of various synthetic techniques. Nearly all techniques are based on the hydrolysis of an iron salt and require careful control of temperature, pH, and concentration. In this Article, we report a new synthetic method which does not require such control and is perhaps the fastest and simplest route to synthesizing ferrhydrite. XRD, TEM, BET, and chemical purity characterizations show that the chemically pure, 2-line ferrihydrite product consists of crystallites 2-6 nm in diameter which aggregate to form mesoporous, high surface area agglomerates that are attractive candidates for the many adsorption applications of ferrihydrite. X-ray PDF data were also collected for the ferrihydrite product and refined against the hexagonal structural model recently proposed by Michel et al. These analyses suggest that ferrihydrite has a consistent, repeatable structure independent of variation in the synthetic method, water content of the sample, or particle size of the crystallites, and this structure can be adequately described by the proposed hexagonal model.

Authors:
; ; ; ; ;  [1]
  1. BYU
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
NSFDOE - BASIC ENERGY SCIENCES
OSTI Identifier:
1043723
Resource Type:
Journal Article
Journal Name:
Inorg. Chem.
Additional Journal Information:
Journal Volume: 51; Journal Issue: (11) ; 06, 2012; Journal ID: ISSN 0020-1669
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ADSORPTION; HYDROLYSIS; IRON; PARTICLE SIZE; STRUCTURAL MODELS; SURFACE AREA; SYNTHESIS; X-RAY DIFFRACTION

Citation Formats

Smith, Stacey J, Page, Katharine, Kim, Hyunjeong, Campbell, Branton J, Boerio-Goates, Juliana, Woodfield, Brian F, and LANL). Novel Synthesis and Structural Analysis of Ferrihydrite. United States: N. p., 2012. Web. doi:10.1021/ic300937f.
Smith, Stacey J, Page, Katharine, Kim, Hyunjeong, Campbell, Branton J, Boerio-Goates, Juliana, Woodfield, Brian F, & LANL). Novel Synthesis and Structural Analysis of Ferrihydrite. United States. https://doi.org/10.1021/ic300937f
Smith, Stacey J, Page, Katharine, Kim, Hyunjeong, Campbell, Branton J, Boerio-Goates, Juliana, Woodfield, Brian F, and LANL). 2012. "Novel Synthesis and Structural Analysis of Ferrihydrite". United States. https://doi.org/10.1021/ic300937f.
@article{osti_1043723,
title = {Novel Synthesis and Structural Analysis of Ferrihydrite},
author = {Smith, Stacey J and Page, Katharine and Kim, Hyunjeong and Campbell, Branton J and Boerio-Goates, Juliana and Woodfield, Brian F and LANL)},
abstractNote = {Naturally occurring ferrihydrite is both impure and difficult to isolate, so the numerous applications and interesting properties of ferrihydrite have spurred the development of various synthetic techniques. Nearly all techniques are based on the hydrolysis of an iron salt and require careful control of temperature, pH, and concentration. In this Article, we report a new synthetic method which does not require such control and is perhaps the fastest and simplest route to synthesizing ferrhydrite. XRD, TEM, BET, and chemical purity characterizations show that the chemically pure, 2-line ferrihydrite product consists of crystallites 2-6 nm in diameter which aggregate to form mesoporous, high surface area agglomerates that are attractive candidates for the many adsorption applications of ferrihydrite. X-ray PDF data were also collected for the ferrihydrite product and refined against the hexagonal structural model recently proposed by Michel et al. These analyses suggest that ferrihydrite has a consistent, repeatable structure independent of variation in the synthetic method, water content of the sample, or particle size of the crystallites, and this structure can be adequately described by the proposed hexagonal model.},
doi = {10.1021/ic300937f},
url = {https://www.osti.gov/biblio/1043723}, journal = {Inorg. Chem.},
issn = {0020-1669},
number = (11) ; 06, 2012,
volume = 51,
place = {United States},
year = {Wed Jul 25 00:00:00 EDT 2012},
month = {Wed Jul 25 00:00:00 EDT 2012}
}