Structural studies of Na-montmorillonite exchanged with Fe2+, Cr3+, and Ti4+ by N2 adsorption and EXAFS

Ruey Shin Juang; Su Hsia Lin; Fu Chuang Huang; Chieng Hsien Cheng

doi:10.1016/j.jcis.2004.02.006

Structural studies of Na-montmorillonite exchanged with Fe²⁺, Cr³⁺, and Ti⁴⁺ by N₂ adsorption and EXAFS

Ruey Shin Juang
, Su Hsia Lin^*
, Fu Chuang Huang
, Chieng Hsien Cheng

^*Corresponding author for this work

Yuan Ze University
Nanya Institute of Technology Taiwan
National Central University

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

20 Scopus citations

Abstract

The structures of Fe²⁺-, Cr³⁺-, and Ti ⁴⁺-modified montmorillonite prepared from ion exchange of the Na-clay with Fe²⁺, Cr³⁺, and Ti⁴⁺ were investigated. Conventional BET surface area and spectroscopic analysis by extended adsorption fine structure (EXAFS) were applied. It was shown that the BET surface area of Na-clay was similar to that of Fe-clay, but somewhat different from those of Cr- and Ti-clay; it decreased in the order Na- > Fe- > Ti- > Cr-montmorillonite. This sequence appeared to be consistent with the ion size Na⁺ (0.95 nm)>Fe²⁺ (0.65 nm)>Cr³⁺ (0.62 nm), except for Ti⁴⁺ (0.69 nm). EXAFS data showed that some Si atoms within montmorillonite were replaced by Ti atoms and that a neostructure of titanium oxide was formed.

Original language	English
Pages (from-to)	337-340
Number of pages	4
Journal	Journal of Colloid and Interface Science
Volume	274
Issue number	1
DOIs	https://doi.org/10.1016/j.jcis.2004.02.006
State	Published - 01 06 2004
Externally published	Yes

Keywords

BET
Cr
EXAFS
Fe
Metal-exchanged montmorillonite
Na
Ti

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10.1016/j.jcis.2004.02.006

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@article{d6f413383caa41a39ec09ce68142f16d,

title = "Structural studies of Na-montmorillonite exchanged with Fe2+, Cr3+, and Ti4+ by N2 adsorption and EXAFS",

abstract = "The structures of Fe2+-, Cr3+-, and Ti 4+-modified montmorillonite prepared from ion exchange of the Na-clay with Fe2+, Cr3+, and Ti4+ were investigated. Conventional BET surface area and spectroscopic analysis by extended adsorption fine structure (EXAFS) were applied. It was shown that the BET surface area of Na-clay was similar to that of Fe-clay, but somewhat different from those of Cr- and Ti-clay; it decreased in the order Na- > Fe- > Ti- > Cr-montmorillonite. This sequence appeared to be consistent with the ion size Na+ (0.95 nm)>Fe2+ (0.65 nm)>Cr3+ (0.62 nm), except for Ti4+ (0.69 nm). EXAFS data showed that some Si atoms within montmorillonite were replaced by Ti atoms and that a neostructure of titanium oxide was formed.",

keywords = "BET, Cr, EXAFS, Fe, Metal-exchanged montmorillonite, Na, Ti",

author = "Juang, \{Ruey Shin\} and Lin, \{Su Hsia\} and Huang, \{Fu Chuang\} and Cheng, \{Chieng Hsien\}",

year = "2004",

month = jun,

day = "1",

doi = "10.1016/j.jcis.2004.02.006",

language = "英语",

volume = "274",

pages = "337--340",

journal = "Journal of Colloid and Interface Science",

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TY - JOUR

T1 - Structural studies of Na-montmorillonite exchanged with Fe2+, Cr3+, and Ti4+ by N2 adsorption and EXAFS

AU - Juang, Ruey Shin

AU - Lin, Su Hsia

AU - Huang, Fu Chuang

AU - Cheng, Chieng Hsien

PY - 2004/6/1

Y1 - 2004/6/1

N2 - The structures of Fe2+-, Cr3+-, and Ti 4+-modified montmorillonite prepared from ion exchange of the Na-clay with Fe2+, Cr3+, and Ti4+ were investigated. Conventional BET surface area and spectroscopic analysis by extended adsorption fine structure (EXAFS) were applied. It was shown that the BET surface area of Na-clay was similar to that of Fe-clay, but somewhat different from those of Cr- and Ti-clay; it decreased in the order Na- > Fe- > Ti- > Cr-montmorillonite. This sequence appeared to be consistent with the ion size Na+ (0.95 nm)>Fe2+ (0.65 nm)>Cr3+ (0.62 nm), except for Ti4+ (0.69 nm). EXAFS data showed that some Si atoms within montmorillonite were replaced by Ti atoms and that a neostructure of titanium oxide was formed.

AB - The structures of Fe2+-, Cr3+-, and Ti 4+-modified montmorillonite prepared from ion exchange of the Na-clay with Fe2+, Cr3+, and Ti4+ were investigated. Conventional BET surface area and spectroscopic analysis by extended adsorption fine structure (EXAFS) were applied. It was shown that the BET surface area of Na-clay was similar to that of Fe-clay, but somewhat different from those of Cr- and Ti-clay; it decreased in the order Na- > Fe- > Ti- > Cr-montmorillonite. This sequence appeared to be consistent with the ion size Na+ (0.95 nm)>Fe2+ (0.65 nm)>Cr3+ (0.62 nm), except for Ti4+ (0.69 nm). EXAFS data showed that some Si atoms within montmorillonite were replaced by Ti atoms and that a neostructure of titanium oxide was formed.

KW - BET

KW - Cr

KW - EXAFS

KW - Fe

KW - Metal-exchanged montmorillonite

KW - Na

KW - Ti

UR - https://www.scopus.com/pages/publications/2042544796

U2 - 10.1016/j.jcis.2004.02.006

DO - 10.1016/j.jcis.2004.02.006

M3 - 文章

AN - SCOPUS:2042544796

SN - 0021-9797

VL - 274

SP - 337

EP - 340

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

IS - 1

ER -

Structural studies of Na-montmorillonite exchanged with Fe²⁺, Cr³⁺, and Ti⁴⁺ by N₂ adsorption and EXAFS

Abstract

Keywords

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