Investigation of surface structures by powder diffraction: a differential pair distribution function study on arsenate sorption on ferrihydrite

Richard Harrington; Douglas B. Hausner; Narayan Bhandari; Daniel R. Strongin; Karena W. Chapman; Peter J. Chupas; Derek S. Middlemiss; Clare P. Grey; John B. Parise

doi:10.1021/ic9022695

Investigation of surface structures by powder diffraction: a differential pair distribution function study on arsenate sorption on ferrihydrite

Richard Harrington
, Douglas B. Hausner
, Narayan Bhandari
, Daniel R. Strongin
, Karena W. Chapman
, Peter J. Chupas
, Derek S. Middlemiss
, Clare P. Grey
, John B. Parise

Stony Brook University
Temple University
United States Department of Energy

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

Differential pair distribution function (d-PDF) analysis of high energy powder X-ray diffraction data was carried out on 2-line ferrihydrite nanoparticles with arsenate oxyanions adsorbed on the surface to investigate the binding mechanism. In this analysis, a PDF of ferrihydrite Is subtracted from a PDF of ferrihydrite with arsenate sorbed on the surface, leaving only correlations from within the surface layer and between the surface and the particle. As-O and As-Fe correlations were observed at 1.68 and 3.29 Å, respectively, In good agreement with previously published EXAFS data, confirming a bidentate binuclear binding mechanism. Further peaks are observed in the d-PDF which are not present in EXAFS, corresponding to correlations between As and O in the particle and As-2nd Fe.

Original language	English
Pages (from-to)	325-330
Number of pages	6
Journal	Inorganic Chemistry
Volume	49
Issue number	1
DOIs	https://doi.org/10.1021/ic9022695
State	Published - Jan 4 2010

Access to Document

10.1021/ic9022695

Cite this

@article{9d95529a53f34b338a1c638a80fe9de9,

title = "Investigation of surface structures by powder diffraction: a differential pair distribution function study on arsenate sorption on ferrihydrite",

abstract = "Differential pair distribution function (d-PDF) analysis of high energy powder X-ray diffraction data was carried out on 2-line ferrihydrite nanoparticles with arsenate oxyanions adsorbed on the surface to investigate the binding mechanism. In this analysis, a PDF of ferrihydrite Is subtracted from a PDF of ferrihydrite with arsenate sorbed on the surface, leaving only correlations from within the surface layer and between the surface and the particle. As-O and As-Fe correlations were observed at 1.68 and 3.29 {\AA}, respectively, In good agreement with previously published EXAFS data, confirming a bidentate binuclear binding mechanism. Further peaks are observed in the d-PDF which are not present in EXAFS, corresponding to correlations between As and O in the particle and As-2nd Fe.",

author = "Richard Harrington and Hausner, \{Douglas B.\} and Narayan Bhandari and Strongin, \{Daniel R.\} and Chapman, \{Karena W.\} and Chupas, \{Peter J.\} and Middlemiss, \{Derek S.\} and Grey, \{Clare P.\} and Parise, \{John B.\}",

year = "2010",

month = jan,

day = "4",

doi = "10.1021/ic9022695",

language = "English",

volume = "49",

pages = "325--330",

journal = "Inorganic Chemistry",

issn = "0020-1669",

number = "1",

}

TY - JOUR

T1 - Investigation of surface structures by powder diffraction

T2 - a differential pair distribution function study on arsenate sorption on ferrihydrite

AU - Harrington, Richard

AU - Hausner, Douglas B.

AU - Bhandari, Narayan

AU - Strongin, Daniel R.

AU - Chapman, Karena W.

AU - Chupas, Peter J.

AU - Middlemiss, Derek S.

AU - Grey, Clare P.

AU - Parise, John B.

PY - 2010/1/4

Y1 - 2010/1/4

N2 - Differential pair distribution function (d-PDF) analysis of high energy powder X-ray diffraction data was carried out on 2-line ferrihydrite nanoparticles with arsenate oxyanions adsorbed on the surface to investigate the binding mechanism. In this analysis, a PDF of ferrihydrite Is subtracted from a PDF of ferrihydrite with arsenate sorbed on the surface, leaving only correlations from within the surface layer and between the surface and the particle. As-O and As-Fe correlations were observed at 1.68 and 3.29 Å, respectively, In good agreement with previously published EXAFS data, confirming a bidentate binuclear binding mechanism. Further peaks are observed in the d-PDF which are not present in EXAFS, corresponding to correlations between As and O in the particle and As-2nd Fe.

AB - Differential pair distribution function (d-PDF) analysis of high energy powder X-ray diffraction data was carried out on 2-line ferrihydrite nanoparticles with arsenate oxyanions adsorbed on the surface to investigate the binding mechanism. In this analysis, a PDF of ferrihydrite Is subtracted from a PDF of ferrihydrite with arsenate sorbed on the surface, leaving only correlations from within the surface layer and between the surface and the particle. As-O and As-Fe correlations were observed at 1.68 and 3.29 Å, respectively, In good agreement with previously published EXAFS data, confirming a bidentate binuclear binding mechanism. Further peaks are observed in the d-PDF which are not present in EXAFS, corresponding to correlations between As and O in the particle and As-2nd Fe.

UR - https://www.scopus.com/pages/publications/73349111965

U2 - 10.1021/ic9022695

DO - 10.1021/ic9022695

M3 - Article

AN - SCOPUS:73349111965

SN - 0020-1669

VL - 49

SP - 325

EP - 330

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 1

ER -

Investigation of surface structures by powder diffraction: a differential pair distribution function study on arsenate sorption on ferrihydrite

Abstract

Access to Document

Other files and links

Fingerprint

Cite this