V2O5/TiO2 catalyst xerogels: Method of preparation and characterization
This work describes a modified sol-gel method for the preparation of V2O5/TiO2 catalysts. The samples have been characterized by N2 adsorption at 77 K, X-ray Diffractometry (XRD), Scanning Electronic Microscopy (SEM/EDX) and Fourier Transform Infrared Spectroscopy (FT-IR). The surface area increases...
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| Veröffentlicht in: | Journal of sol-gel science and technology 2002-08, Vol.25 (1), p.75-82 |
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| creator | RODELLA, Cristiane B FRANCO, Roberto W. A MAGON, Claudio J DONOSO, Jose P NUNES, Luis A. O SAEKI, Margarida J AEGERTER, Michel A FLORENTINO, Ariovaldo O |
| description | This work describes a modified sol-gel method for the preparation of V2O5/TiO2 catalysts. The samples have been characterized by N2 adsorption at 77 K, X-ray Diffractometry (XRD), Scanning Electronic Microscopy (SEM/EDX) and Fourier Transform Infrared Spectroscopy (FT-IR). The surface area increases with the vanadia loading from 24 m2 g−1 for pure TiO2 to 87 m2 g−1 for 9 wt% of V2O5. The rutile form is predominant for pure TiO2 but becomes enriched with anatase phase when vanadia loading is increased. No crystalline V2O5 phase was observed in the diffractograms of the catalysts. Analysis by SEM showed heterogeneous granulation of particles with high vanadium dispersion. Two species of surface vanadium were observed by FT-IR spectroscopy: a monomeric vanadyl and polymeric vanadates. The vanadyl/vanadate ratio remains practically constant. Ethanol oxidation was used as a catalytic test in a temperature range from 350 to 560 K. The catalytic activity starts around 380 K. For the sample with 9 wt% of vanadia, the conversion of ethanol into acetaldehyde as the main product was approximately 90% at 473 K. |
| doi_str_mv | 10.1023/A:1016097128696 |
| format | Article |
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A ; MAGON, Claudio J ; DONOSO, Jose P ; NUNES, Luis A. O ; SAEKI, Margarida J ; AEGERTER, Michel A ; FLORENTINO, Ariovaldo O</creator><creatorcontrib>RODELLA, Cristiane B ; FRANCO, Roberto W. A ; MAGON, Claudio J ; DONOSO, Jose P ; NUNES, Luis A. O ; SAEKI, Margarida J ; AEGERTER, Michel A ; FLORENTINO, Ariovaldo O</creatorcontrib><description>This work describes a modified sol-gel method for the preparation of V2O5/TiO2 catalysts. The samples have been characterized by N2 adsorption at 77 K, X-ray Diffractometry (XRD), Scanning Electronic Microscopy (SEM/EDX) and Fourier Transform Infrared Spectroscopy (FT-IR). The surface area increases with the vanadia loading from 24 m2 g−1 for pure TiO2 to 87 m2 g−1 for 9 wt% of V2O5. The rutile form is predominant for pure TiO2 but becomes enriched with anatase phase when vanadia loading is increased. No crystalline V2O5 phase was observed in the diffractograms of the catalysts. Analysis by SEM showed heterogeneous granulation of particles with high vanadium dispersion. Two species of surface vanadium were observed by FT-IR spectroscopy: a monomeric vanadyl and polymeric vanadates. The vanadyl/vanadate ratio remains practically constant. Ethanol oxidation was used as a catalytic test in a temperature range from 350 to 560 K. The catalytic activity starts around 380 K. For the sample with 9 wt% of vanadia, the conversion of ethanol into acetaldehyde as the main product was approximately 90% at 473 K.</description><identifier>ISSN: 0928-0707</identifier><identifier>EISSN: 1573-4846</identifier><identifier>DOI: 10.1023/A:1016097128696</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Acetaldehyde ; Anatase ; Catalysis ; Catalysts ; Catalysts: preparations and properties ; Catalytic activity ; Chemistry ; Ethanol ; Exact sciences and technology ; Fourier transforms ; General and physical chemistry ; Granulation ; Infrared spectroscopy ; Oxidation ; Sol-gel processes ; Spectrum analysis ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; Titanium dioxide ; Vanadates ; Vanadium pentoxide ; Vanadium pentoxide-Titanium dioxide ; Xerogels</subject><ispartof>Journal of sol-gel science and technology, 2002-08, Vol.25 (1), p.75-82</ispartof><rights>2002 INIST-CNRS</rights><rights>Journal of Sol-Gel Science and Technology is a copyright of Springer, (2002). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c257t-f5d17f11998b8e86ef149fd44eb29873d878c9d1717fe69550d4a09e82da7f673</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=13787849$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>RODELLA, Cristiane B</creatorcontrib><creatorcontrib>FRANCO, Roberto W. A</creatorcontrib><creatorcontrib>MAGON, Claudio J</creatorcontrib><creatorcontrib>DONOSO, Jose P</creatorcontrib><creatorcontrib>NUNES, Luis A. O</creatorcontrib><creatorcontrib>SAEKI, Margarida J</creatorcontrib><creatorcontrib>AEGERTER, Michel A</creatorcontrib><creatorcontrib>FLORENTINO, Ariovaldo O</creatorcontrib><title>V2O5/TiO2 catalyst xerogels: Method of preparation and characterization</title><title>Journal of sol-gel science and technology</title><description>This work describes a modified sol-gel method for the preparation of V2O5/TiO2 catalysts. The samples have been characterized by N2 adsorption at 77 K, X-ray Diffractometry (XRD), Scanning Electronic Microscopy (SEM/EDX) and Fourier Transform Infrared Spectroscopy (FT-IR). The surface area increases with the vanadia loading from 24 m2 g−1 for pure TiO2 to 87 m2 g−1 for 9 wt% of V2O5. The rutile form is predominant for pure TiO2 but becomes enriched with anatase phase when vanadia loading is increased. No crystalline V2O5 phase was observed in the diffractograms of the catalysts. Analysis by SEM showed heterogeneous granulation of particles with high vanadium dispersion. Two species of surface vanadium were observed by FT-IR spectroscopy: a monomeric vanadyl and polymeric vanadates. The vanadyl/vanadate ratio remains practically constant. Ethanol oxidation was used as a catalytic test in a temperature range from 350 to 560 K. The catalytic activity starts around 380 K. For the sample with 9 wt% of vanadia, the conversion of ethanol into acetaldehyde as the main product was approximately 90% at 473 K.</description><subject>Acetaldehyde</subject><subject>Anatase</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Catalysts: preparations and properties</subject><subject>Catalytic activity</subject><subject>Chemistry</subject><subject>Ethanol</subject><subject>Exact sciences and technology</subject><subject>Fourier transforms</subject><subject>General and physical chemistry</subject><subject>Granulation</subject><subject>Infrared spectroscopy</subject><subject>Oxidation</subject><subject>Sol-gel processes</subject><subject>Spectrum analysis</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>Titanium dioxide</subject><subject>Vanadates</subject><subject>Vanadium pentoxide</subject><subject>Vanadium pentoxide-Titanium dioxide</subject><subject>Xerogels</subject><issn>0928-0707</issn><issn>1573-4846</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNotjUtLAzEAhIMoWKtnrwHxuDbvR2-laBUqe6lelzQPu2XdXZMUrL_eoD0NM3wzA8AtRg8YETpbzDHCAmmJiRJanIEJ5pJWTDFxDiZIE1UhieQluEppjxDiDMsJWL2Tms82bU2gNdl0x5Tht4_Dh-_SHL76vBscHAIcox9NNLkdemh6B-2uOJt9bH_-wmtwEUyX_M1Jp-Dt6XGzfK7W9epluVhXlnCZq8AdlgFjrdVWeSV8wEwHx5jfEq0kdUoqqwtTKC8058gxg7RXxBkZhKRTcPe_O8bh6-BTbvbDIfblsiGElwIjkhTq_kSZZE0Xoultm5oxtp8mHhtMZflhmv4Co1tZrQ</recordid><startdate>20020801</startdate><enddate>20020801</enddate><creator>RODELLA, Cristiane B</creator><creator>FRANCO, Roberto W. A</creator><creator>MAGON, Claudio J</creator><creator>DONOSO, Jose P</creator><creator>NUNES, Luis A. O</creator><creator>SAEKI, Margarida J</creator><creator>AEGERTER, Michel A</creator><creator>FLORENTINO, Ariovaldo O</creator><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</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></search><sort><creationdate>20020801</creationdate><title>V2O5/TiO2 catalyst xerogels: Method of preparation and characterization</title><author>RODELLA, Cristiane B ; FRANCO, Roberto W. A ; MAGON, Claudio J ; DONOSO, Jose P ; NUNES, Luis A. O ; SAEKI, Margarida J ; AEGERTER, Michel A ; FLORENTINO, Ariovaldo O</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c257t-f5d17f11998b8e86ef149fd44eb29873d878c9d1717fe69550d4a09e82da7f673</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Acetaldehyde</topic><topic>Anatase</topic><topic>Catalysis</topic><topic>Catalysts</topic><topic>Catalysts: preparations and properties</topic><topic>Catalytic activity</topic><topic>Chemistry</topic><topic>Ethanol</topic><topic>Exact sciences and technology</topic><topic>Fourier transforms</topic><topic>General and physical chemistry</topic><topic>Granulation</topic><topic>Infrared spectroscopy</topic><topic>Oxidation</topic><topic>Sol-gel processes</topic><topic>Spectrum analysis</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>Titanium dioxide</topic><topic>Vanadates</topic><topic>Vanadium pentoxide</topic><topic>Vanadium pentoxide-Titanium dioxide</topic><topic>Xerogels</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>RODELLA, Cristiane B</creatorcontrib><creatorcontrib>FRANCO, Roberto W. A</creatorcontrib><creatorcontrib>MAGON, Claudio J</creatorcontrib><creatorcontrib>DONOSO, Jose P</creatorcontrib><creatorcontrib>NUNES, Luis A. 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A</au><au>MAGON, Claudio J</au><au>DONOSO, Jose P</au><au>NUNES, Luis A. O</au><au>SAEKI, Margarida J</au><au>AEGERTER, Michel A</au><au>FLORENTINO, Ariovaldo O</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>V2O5/TiO2 catalyst xerogels: Method of preparation and characterization</atitle><jtitle>Journal of sol-gel science and technology</jtitle><date>2002-08-01</date><risdate>2002</risdate><volume>25</volume><issue>1</issue><spage>75</spage><epage>82</epage><pages>75-82</pages><issn>0928-0707</issn><eissn>1573-4846</eissn><abstract>This work describes a modified sol-gel method for the preparation of V2O5/TiO2 catalysts. The samples have been characterized by N2 adsorption at 77 K, X-ray Diffractometry (XRD), Scanning Electronic Microscopy (SEM/EDX) and Fourier Transform Infrared Spectroscopy (FT-IR). The surface area increases with the vanadia loading from 24 m2 g−1 for pure TiO2 to 87 m2 g−1 for 9 wt% of V2O5. The rutile form is predominant for pure TiO2 but becomes enriched with anatase phase when vanadia loading is increased. No crystalline V2O5 phase was observed in the diffractograms of the catalysts. Analysis by SEM showed heterogeneous granulation of particles with high vanadium dispersion. Two species of surface vanadium were observed by FT-IR spectroscopy: a monomeric vanadyl and polymeric vanadates. The vanadyl/vanadate ratio remains practically constant. Ethanol oxidation was used as a catalytic test in a temperature range from 350 to 560 K. The catalytic activity starts around 380 K. For the sample with 9 wt% of vanadia, the conversion of ethanol into acetaldehyde as the main product was approximately 90% at 473 K.</abstract><cop>Heidelberg</cop><pub>Springer</pub><doi>10.1023/A:1016097128696</doi><tpages>8</tpages></addata></record> |
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| subjects | Acetaldehyde Anatase Catalysis Catalysts Catalysts: preparations and properties Catalytic activity Chemistry Ethanol Exact sciences and technology Fourier transforms General and physical chemistry Granulation Infrared spectroscopy Oxidation Sol-gel processes Spectrum analysis Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Titanium dioxide Vanadates Vanadium pentoxide Vanadium pentoxide-Titanium dioxide Xerogels |
| title | V2O5/TiO2 catalyst xerogels: Method of preparation and characterization |
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