Sol-gel processing of IrO2-TiO2 mixed metal oxides based on a hexachloroiridate precursor
Mixed IrO2–TiO2 oxides were prepared by the sol–gel method upon acid-catalysed hydrolysis of an iridium solution in ethanol mixed with titanium tetraethoxide in ethanol. The iridium solution was obtained by reaction of the sodium hexachloroiridate(IV) precursor in the presence of sodium ethoxide in...
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| Veröffentlicht in: | Journal of sol-gel science and technology 2007-12, Vol.44 (3), p.219-225 |
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| container_title | Journal of sol-gel science and technology |
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| creator | OSMAN, Julian R CRAYSTON, Joe A PRATT, Allin RICHENS, David T |
| description | Mixed IrO2–TiO2 oxides were prepared by the sol–gel method upon acid-catalysed hydrolysis of an iridium solution in ethanol mixed with titanium tetraethoxide in ethanol. The iridium solution was obtained by reaction of the sodium hexachloroiridate(IV) precursor in the presence of sodium ethoxide in ethanol. Gels were formed in all but the high-Ir samples. Analysis of the dried gels showed minority-phase enrichment at the surface and the presence of Ir(III), while microscopy showed evidence for dispersed iridium-containing nanoparticles (1–20 nm in diameter). XRD powder patterns of the calcined material showed peaks due to a small amount of crystalline NaCl impurity which could be removed by washing. This left amorphous phases, except in the Ir:Ti 3:2 case, which showed evidence for the presence of separate crystalline oxide phases: anatase, IrO2 and TixIr1−xO2. |
| doi_str_mv | 10.1007/s10971-007-1623-x |
| format | Article |
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The iridium solution was obtained by reaction of the sodium hexachloroiridate(IV) precursor in the presence of sodium ethoxide in ethanol. Gels were formed in all but the high-Ir samples. Analysis of the dried gels showed minority-phase enrichment at the surface and the presence of Ir(III), while microscopy showed evidence for dispersed iridium-containing nanoparticles (1–20 nm in diameter). XRD powder patterns of the calcined material showed peaks due to a small amount of crystalline NaCl impurity which could be removed by washing. This left amorphous phases, except in the Ir:Ti 3:2 case, which showed evidence for the presence of separate crystalline oxide phases: anatase, IrO2 and TixIr1−xO2.</description><identifier>ISSN: 0928-0707</identifier><identifier>EISSN: 1573-4846</identifier><identifier>DOI: 10.1007/s10971-007-1623-x</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Anatase ; Chemistry ; Colloidal gels. Colloidal sols ; Colloidal state and disperse state ; Crystal structure ; Crystallinity ; Ethanol ; Exact sciences and technology ; Gels ; General and physical chemistry ; Infrared analysis ; Iridium ; Nanoparticles ; Physical and chemical studies. Granulometry. Electrokinetic phenomena ; Precursors ; Sol-gel processes ; Titanium ; Titanium dioxide</subject><ispartof>Journal of sol-gel science and technology, 2007-12, Vol.44 (3), p.219-225</ispartof><rights>2008 INIST-CNRS</rights><rights>Journal of Sol-Gel Science and Technology is a copyright of Springer, (2007). 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The iridium solution was obtained by reaction of the sodium hexachloroiridate(IV) precursor in the presence of sodium ethoxide in ethanol. Gels were formed in all but the high-Ir samples. Analysis of the dried gels showed minority-phase enrichment at the surface and the presence of Ir(III), while microscopy showed evidence for dispersed iridium-containing nanoparticles (1–20 nm in diameter). XRD powder patterns of the calcined material showed peaks due to a small amount of crystalline NaCl impurity which could be removed by washing. This left amorphous phases, except in the Ir:Ti 3:2 case, which showed evidence for the presence of separate crystalline oxide phases: anatase, IrO2 and TixIr1−xO2.</description><subject>Anatase</subject><subject>Chemistry</subject><subject>Colloidal gels. Colloidal sols</subject><subject>Colloidal state and disperse state</subject><subject>Crystal structure</subject><subject>Crystallinity</subject><subject>Ethanol</subject><subject>Exact sciences and technology</subject><subject>Gels</subject><subject>General and physical chemistry</subject><subject>Infrared analysis</subject><subject>Iridium</subject><subject>Nanoparticles</subject><subject>Physical and chemical studies. Granulometry. Electrokinetic phenomena</subject><subject>Precursors</subject><subject>Sol-gel processes</subject><subject>Titanium</subject><subject>Titanium dioxide</subject><issn>0928-0707</issn><issn>1573-4846</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdkM1LAzEQxYMoWD_-AG8B0Vs0k-wmm6OIH4VCD9aDp5BmZzVlu6nJFtb_3i0tCJ7mMfzeY-YRcgX8DjjX9xm40cBGyUAJyYYjMoFSS1ZUhTomE25Exbjm-pSc5bzinJcF6An5eIst-8SWblL0mHPoPmls6DTNBVuEuaDrMGBN19i7lsYh1Jjp0uVxFTvq6BcOzn-1McWQQu16HHPQb1OO6YKcNK7NeHmY5-T9-Wnx-Mpm85fp48OMeSmLnmlTKgNKVmKpleeF0A2ChyWomhtXGFkjoDG8wYZL6YXSDkbA1N4o5bCW5-R2nzt-8L3F3Nt1yB7b1nUYt9lK4KAVVCN4_Q9cxW3qxtusEKUplFR6R8Ge8inmnLCxmxTWLv1Y4HZXtd1XbXdyV7UdRs_NIdll79omuc6H_Gc0lZJFCfIXnDt9tw</recordid><startdate>20071201</startdate><enddate>20071201</enddate><creator>OSMAN, Julian R</creator><creator>CRAYSTON, Joe A</creator><creator>PRATT, Allin</creator><creator>RICHENS, David T</creator><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20071201</creationdate><title>Sol-gel processing of IrO2-TiO2 mixed metal oxides based on a hexachloroiridate precursor</title><author>OSMAN, Julian R ; CRAYSTON, Joe A ; PRATT, Allin ; RICHENS, David T</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-7956916382b76c0427fe1c1b16d09a493de1e990fef033c267a1e1c9dc966aed3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Anatase</topic><topic>Chemistry</topic><topic>Colloidal gels. 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The iridium solution was obtained by reaction of the sodium hexachloroiridate(IV) precursor in the presence of sodium ethoxide in ethanol. Gels were formed in all but the high-Ir samples. Analysis of the dried gels showed minority-phase enrichment at the surface and the presence of Ir(III), while microscopy showed evidence for dispersed iridium-containing nanoparticles (1–20 nm in diameter). XRD powder patterns of the calcined material showed peaks due to a small amount of crystalline NaCl impurity which could be removed by washing. This left amorphous phases, except in the Ir:Ti 3:2 case, which showed evidence for the presence of separate crystalline oxide phases: anatase, IrO2 and TixIr1−xO2.</abstract><cop>Heidelberg</cop><pub>Springer</pub><doi>10.1007/s10971-007-1623-x</doi><tpages>7</tpages></addata></record> |
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| subjects | Anatase Chemistry Colloidal gels. Colloidal sols Colloidal state and disperse state Crystal structure Crystallinity Ethanol Exact sciences and technology Gels General and physical chemistry Infrared analysis Iridium Nanoparticles Physical and chemical studies. Granulometry. Electrokinetic phenomena Precursors Sol-gel processes Titanium Titanium dioxide |
| title | Sol-gel processing of IrO2-TiO2 mixed metal oxides based on a hexachloroiridate precursor |
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