New Varieties of Zinc–Chromium–Sulfate Lamellar Double Hydroxides
Identifieur interne : 001380 ( Istex/Corpus ); précédent : 001379; suivant : 001381New Varieties of Zinc–Chromium–Sulfate Lamellar Double Hydroxides
Auteurs : M. Khaldi ; A. De Roy ; M. Chaouch ; J. P. BesseSource :
- Journal of Solid State Chemistry [ 0022-4596 ] ; 1997.
Abstract
The synthesis of zinc–chromium lamellar double hydroxides (LDHs) intercalated by sulfate anions is carried out with a one-step method that combines coprecipitation and anionic exchange. The materials obtained in a reactor containing a sodium sulfate solution are compared with those prepared from lithium, potassium, and ammonium sulfate solutions. The compounds are characterized by chemical analysis, powder X-ray diffraction, and infra-red spectroscopy. Depending on pH conditions, the washing process, and the nature of the monovalent cation, the sulfate intercalated compounds exhibit two 2H hexagonal varieties with different layer spacingsd≈8.9 Å andd≈11 Å at room temperature; this last phase is related to the insertion of alkaline interlamellar cations. Under dry air, the loss of intercalated water leads to a 3R rhombohedral variety withd≈8.2 Å. A second rhombohedral variety withd≈10.9 Å is reversibly obtained from the “8.9 Å” phase under high relative humidity. These four [Zn–Cr–SO4] LDHs differ by their stacking sequences and interlamellar distances and can be selectively obtained.
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DOI: 10.1006/jssc.1997.7280
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Khaldi</name><affiliation><mods:affiliation>Laboratoire de Chimie-Physique, Université Sidi Mohamed Ben Abdellah Dhar El Mehraz, Fès, Morocco</mods:affiliation></affiliation></author><author><name sortKey="De Roy, A" sort="De Roy, A" uniqKey="De Roy A" first="A." last="De Roy">A. De Roy</name><affiliation><mods:affiliation>Laboratoire de Physico-Chimie des Matériaux, Université Blaise Pascal, 63177, Aubière Cedex, France</mods:affiliation></affiliation></author><author><name sortKey="Chaouch, M" sort="Chaouch, M" uniqKey="Chaouch M" first="M." last="Chaouch">M. Chaouch</name><affiliation><mods:affiliation>Laboratoire de Chimie-Physique, Université Sidi Mohamed Ben Abdellah Dhar El Mehraz, Fès, Morocco</mods:affiliation></affiliation></author><author><name sortKey="Besse, J P" sort="Besse, J P" uniqKey="Besse J" first="J. P." last="Besse">J. P. Besse</name><affiliation><mods:affiliation>Laboratoire de Physico-Chimie des Matériaux, Université Blaise Pascal, 63177, Aubière Cedex, France</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Solid State Chemistry</title><title level="j" type="abbrev">YJSSC</title><idno type="ISSN">0022-4596</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1997">1997</date><biblScope unit="volume">130</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="66">66</biblScope><biblScope unit="page" to="73">73</biblScope></imprint><idno type="ISSN">0022-4596</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-4596</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The synthesis of zinc–chromium lamellar double hydroxides (LDHs) intercalated by sulfate anions is carried out with a one-step method that combines coprecipitation and anionic exchange. The materials obtained in a reactor containing a sodium sulfate solution are compared with those prepared from lithium, potassium, and ammonium sulfate solutions. The compounds are characterized by chemical analysis, powder X-ray diffraction, and infra-red spectroscopy. Depending on pH conditions, the washing process, and the nature of the monovalent cation, the sulfate intercalated compounds exhibit two 2H hexagonal varieties with different layer spacingsd≈8.9 Å andd≈11 Å at room temperature; this last phase is related to the insertion of alkaline interlamellar cations. Under dry air, the loss of intercalated water leads to a 3R rhombohedral variety withd≈8.2 Å. A second rhombohedral variety withd≈10.9 Å is reversibly obtained from the “8.9 Å” phase under high relative humidity. These four [Zn–Cr–SO4] LDHs differ by their stacking sequences and interlamellar distances and can be selectively obtained.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>M. Khaldi</name><affiliations><json:string>Laboratoire de Chimie-Physique, Université Sidi Mohamed Ben Abdellah Dhar El Mehraz, Fès, Morocco</json:string></affiliations></json:item><json:item><name>A. De Roy</name><affiliations><json:string>Laboratoire de Physico-Chimie des Matériaux, Université Blaise Pascal, 63177, Aubière Cedex, France</json:string></affiliations></json:item><json:item><name>M. Chaouch</name><affiliations><json:string>Laboratoire de Chimie-Physique, Université Sidi Mohamed Ben Abdellah Dhar El Mehraz, Fès, Morocco</json:string></affiliations></json:item><json:item><name>J.P. 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Depending on pH conditions, the washing process, and the nature of the monovalent cation, the sulfate intercalated compounds exhibit two 2H hexagonal varieties with different layer spacingsd≈8.9 Å andd≈11 Å at room temperature; this last phase is related to the insertion of alkaline interlamellar cations. Under dry air, the loss of intercalated water leads to a 3R rhombohedral variety withd≈8.2 Å. A second rhombohedral variety withd≈10.9 Å is reversibly obtained from the “8.9 Å” phase under high relative humidity. 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The materials obtained in a reactor containing a sodium sulfate solution are compared with those prepared from lithium, potassium, and ammonium sulfate solutions. The compounds are characterized by chemical analysis, powder X-ray diffraction, and infra-red spectroscopy. Depending on pH conditions, the washing process, and the nature of the monovalent cation, the sulfate intercalated compounds exhibit two 2H hexagonal varieties with different layer spacingsd≈8.9 Å andd≈11 Å at room temperature; this last phase is related to the insertion of alkaline interlamellar cations. Under dry air, the loss of intercalated water leads to a 3R rhombohedral variety withd≈8.2 Å. A second rhombohedral variety withd≈10.9 Å is reversibly obtained from the “8.9 Å” phase under high relative humidity. These four [Zn–Cr–SO4] LDHs differ by their stacking sequences and interlamellar distances and can be selectively obtained.</p></abstract></profileDesc><revisionDesc><change when="1997">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/FFFD0F4D7569E301906888EFC0EC9C5F488C9E91/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>YJSSC</jid><aid>97280</aid><ce:pii>S0022-4596(97)97280-7</ce:pii><ce:doi>10.1006/jssc.1997.7280</ce:doi><ce:copyright type="full-transfer" year="1997">Academic Press</ce:copyright></item-info><head><ce:article-footnote><ce:label>☆</ce:label><ce:note-para>M. 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The materials obtained in a reactor containing a sodium sulfate solution are compared with those prepared from lithium, potassium, and ammonium sulfate solutions. The compounds are characterized by chemical analysis, powder X-ray diffraction, and infra-red spectroscopy. Depending on pH conditions, the washing process, and the nature of the monovalent cation, the sulfate intercalated compounds exhibit two 2H hexagonal varieties with different layer spacings<ce:italic>d</ce:italic>≈8.9 Å and<ce:italic>d</ce:italic>≈11 Å at room temperature; this last phase is related to the insertion of alkaline interlamellar cations. Under dry air, the loss of intercalated water leads to a 3R rhombohedral variety with<ce:italic>d</ce:italic>≈8.2 Å. A second rhombohedral variety with<ce:italic>d</ce:italic>≈10.9 Å is reversibly obtained from the “8.9 Å” phase under high relative humidity. These four [Zn–Cr–SO<ce:inf>4</ce:inf>] LDHs differ by their stacking sequences and interlamellar distances and can be selectively obtained.</ce:simple-para></ce:abstract-sec></ce:abstract></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>New Varieties of Zinc–Chromium–Sulfate Lamellar Double Hydroxides</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>New Varieties of Zinc–Chromium–Sulfate Lamellar Double Hydroxides</title></titleInfo><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Khaldi</namePart><affiliation>Laboratoire de Chimie-Physique, Université Sidi Mohamed Ben Abdellah Dhar El Mehraz, Fès, Morocco</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">De Roy</namePart><affiliation>Laboratoire de Physico-Chimie des Matériaux, Université Blaise Pascal, 63177, Aubière Cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Chaouch</namePart><affiliation>Laboratoire de Chimie-Physique, Université Sidi Mohamed Ben Abdellah Dhar El Mehraz, Fès, Morocco</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.P.</namePart><namePart type="family">Besse</namePart><affiliation>Laboratoire de Physico-Chimie des Matériaux, Université Blaise Pascal, 63177, Aubière Cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1997</dateIssued><copyrightDate encoding="w3cdtf">1997</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The synthesis of zinc–chromium lamellar double hydroxides (LDHs) intercalated by sulfate anions is carried out with a one-step method that combines coprecipitation and anionic exchange. The materials obtained in a reactor containing a sodium sulfate solution are compared with those prepared from lithium, potassium, and ammonium sulfate solutions. The compounds are characterized by chemical analysis, powder X-ray diffraction, and infra-red spectroscopy. Depending on pH conditions, the washing process, and the nature of the monovalent cation, the sulfate intercalated compounds exhibit two 2H hexagonal varieties with different layer spacingsd≈8.9 Å andd≈11 Å at room temperature; this last phase is related to the insertion of alkaline interlamellar cations. Under dry air, the loss of intercalated water leads to a 3R rhombohedral variety withd≈8.2 Å. A second rhombohedral variety withd≈10.9 Å is reversibly obtained from the “8.9 Å” phase under high relative humidity. These four [Zn–Cr–SO4] LDHs differ by their stacking sequences and interlamellar distances and can be selectively obtained.</abstract><note>M. L. OcelliH. E. 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