Structure and phase changes of alumina produced by flame hydrolysis
Fumed alumina from the combustion of AlCl produced nano particles with specific areas from 30 to 220 m g (BET) which were characterized by powder X-ray diffraction, Al solid-state NMR and transmission electron microscopy. During the short-lived synthesis, highly disordered γ-alumina progressively t...
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| Veröffentlicht in: | Dalton transactions : an international journal of inorganic chemistry 2024-08, Vol.53 (34), p.14246-14257 |
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| container_issue | 34 |
| container_start_page | 14246 |
| container_title | Dalton transactions : an international journal of inorganic chemistry |
| container_volume | 53 |
| creator | Nasir, Jamal Schmidt, Franz Menzel, Frank Schmedt Auf der Günne, Jörn |
| description | Fumed alumina from the combustion of AlCl
produced nano particles with specific areas from 30 to 220 m
g
(BET) which were characterized by powder X-ray diffraction,
Al solid-state NMR and transmission electron microscopy. During the short-lived synthesis, highly disordered γ-alumina progressively transforms into a mixture of δ and θ-alumina. For the γ-alumina particles, only for particles with the highest specific area a significant amount of five-coordinated Al can be found which is only partially located in the particle surface. Water can be bound reversibly and increases the coordination number of aluminium atoms in the particle surface. For the well-crystallized mixture of δ and θ-alumina, high resolution and high S/N powder XRD pattern features a large number of superstructure reflections along with the commonly observed diffuse reflections.
Al MQMAS NMR provides a total of 8 crystallographic sites with an unusually high resolution in the tetrahedral region, with 4 distinct AlO
sites pertaining to the δ phase alone. The results suggest that the δ-alumina phase produced in this process can be described as an ordered structure. |
| doi_str_mv | 10.1039/d4dt01809e |
| format | Article |
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produced nano particles with specific areas from 30 to 220 m
g
(BET) which were characterized by powder X-ray diffraction,
Al solid-state NMR and transmission electron microscopy. During the short-lived synthesis, highly disordered γ-alumina progressively transforms into a mixture of δ and θ-alumina. For the γ-alumina particles, only for particles with the highest specific area a significant amount of five-coordinated Al can be found which is only partially located in the particle surface. Water can be bound reversibly and increases the coordination number of aluminium atoms in the particle surface. For the well-crystallized mixture of δ and θ-alumina, high resolution and high S/N powder XRD pattern features a large number of superstructure reflections along with the commonly observed diffuse reflections.
Al MQMAS NMR provides a total of 8 crystallographic sites with an unusually high resolution in the tetrahedral region, with 4 distinct AlO
sites pertaining to the δ phase alone. The results suggest that the δ-alumina phase produced in this process can be described as an ordered structure.</description><identifier>ISSN: 1477-9226</identifier><identifier>ISSN: 1477-9234</identifier><identifier>EISSN: 1477-9234</identifier><identifier>DOI: 10.1039/d4dt01809e</identifier><identifier>PMID: 39129482</identifier><language>eng</language><publisher>England: Royal Society of Chemistry</publisher><subject>Alumina ; Aluminum chloride ; Aluminum oxide ; Atomic properties ; Coordination numbers ; Crystallization ; Crystallography ; High resolution ; Mixtures ; NMR ; Nuclear magnetic resonance ; Superstructures ; Transitional aluminas ; X ray powder diffraction</subject><ispartof>Dalton transactions : an international journal of inorganic chemistry, 2024-08, Vol.53 (34), p.14246-14257</ispartof><rights>Copyright Royal Society of Chemistry 2024</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c240t-7881d27a5c07a3baf131e2c56176bfd432abc4aa03f7a99b40a058168e56409e3</cites><orcidid>0000-0003-2294-796X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,27929,27930</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/39129482$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Nasir, Jamal</creatorcontrib><creatorcontrib>Schmidt, Franz</creatorcontrib><creatorcontrib>Menzel, Frank</creatorcontrib><creatorcontrib>Schmedt Auf der Günne, Jörn</creatorcontrib><title>Structure and phase changes of alumina produced by flame hydrolysis</title><title>Dalton transactions : an international journal of inorganic chemistry</title><addtitle>Dalton Trans</addtitle><description>Fumed alumina from the combustion of AlCl
produced nano particles with specific areas from 30 to 220 m
g
(BET) which were characterized by powder X-ray diffraction,
Al solid-state NMR and transmission electron microscopy. During the short-lived synthesis, highly disordered γ-alumina progressively transforms into a mixture of δ and θ-alumina. For the γ-alumina particles, only for particles with the highest specific area a significant amount of five-coordinated Al can be found which is only partially located in the particle surface. Water can be bound reversibly and increases the coordination number of aluminium atoms in the particle surface. For the well-crystallized mixture of δ and θ-alumina, high resolution and high S/N powder XRD pattern features a large number of superstructure reflections along with the commonly observed diffuse reflections.
Al MQMAS NMR provides a total of 8 crystallographic sites with an unusually high resolution in the tetrahedral region, with 4 distinct AlO
sites pertaining to the δ phase alone. The results suggest that the δ-alumina phase produced in this process can be described as an ordered structure.</description><subject>Alumina</subject><subject>Aluminum chloride</subject><subject>Aluminum oxide</subject><subject>Atomic properties</subject><subject>Coordination numbers</subject><subject>Crystallization</subject><subject>Crystallography</subject><subject>High resolution</subject><subject>Mixtures</subject><subject>NMR</subject><subject>Nuclear magnetic resonance</subject><subject>Superstructures</subject><subject>Transitional aluminas</subject><subject>X ray powder diffraction</subject><issn>1477-9226</issn><issn>1477-9234</issn><issn>1477-9234</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNpd0D1PwzAQBmALgWgpLPwAZIkFIRXOH3HiEbXlQ6rEQJmji-3QVPkodjLk35PS0oHpbnj06u4l5JrBAwOhH620LbAEtDshYybjeKq5kKfHnasRuQhhA8A5RPycjIRmXMuEj8nso_WdaTvvKNaWbtcYHDVrrL9coE1Oseyqoka69Y3tjLM062leYuXoure-KftQhEtylmMZ3NVhTsjn82I1e50u31_eZk_LqeES2mmcJMzyGCMDMYoMcyaY4yZSLFZZbqXgmBmJCCKPUetMAkKUMJW4SMnhOTEhd_vc4ZjvzoU2rYpgXFli7ZoupAI0BwYQqYHe_qObpvP1cN1OxUIrpeSg7vfK-CYE7_J064sKfZ8ySHfVpnM5X_1WuxjwzSGyyypnj_SvS_EDAvpyXQ</recordid><startdate>20240827</startdate><enddate>20240827</enddate><creator>Nasir, Jamal</creator><creator>Schmidt, Franz</creator><creator>Menzel, Frank</creator><creator>Schmedt Auf der Günne, Jörn</creator><general>Royal Society of Chemistry</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0003-2294-796X</orcidid></search><sort><creationdate>20240827</creationdate><title>Structure and phase changes of alumina produced by flame hydrolysis</title><author>Nasir, Jamal ; Schmidt, Franz ; Menzel, Frank ; Schmedt Auf der Günne, Jörn</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c240t-7881d27a5c07a3baf131e2c56176bfd432abc4aa03f7a99b40a058168e56409e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Alumina</topic><topic>Aluminum chloride</topic><topic>Aluminum oxide</topic><topic>Atomic properties</topic><topic>Coordination numbers</topic><topic>Crystallization</topic><topic>Crystallography</topic><topic>High resolution</topic><topic>Mixtures</topic><topic>NMR</topic><topic>Nuclear magnetic resonance</topic><topic>Superstructures</topic><topic>Transitional aluminas</topic><topic>X ray powder diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nasir, Jamal</creatorcontrib><creatorcontrib>Schmidt, Franz</creatorcontrib><creatorcontrib>Menzel, Frank</creatorcontrib><creatorcontrib>Schmedt Auf der Günne, Jörn</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Dalton transactions : an international journal of inorganic chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nasir, Jamal</au><au>Schmidt, Franz</au><au>Menzel, Frank</au><au>Schmedt Auf der Günne, Jörn</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Structure and phase changes of alumina produced by flame hydrolysis</atitle><jtitle>Dalton transactions : an international journal of inorganic chemistry</jtitle><addtitle>Dalton Trans</addtitle><date>2024-08-27</date><risdate>2024</risdate><volume>53</volume><issue>34</issue><spage>14246</spage><epage>14257</epage><pages>14246-14257</pages><issn>1477-9226</issn><issn>1477-9234</issn><eissn>1477-9234</eissn><abstract>Fumed alumina from the combustion of AlCl
produced nano particles with specific areas from 30 to 220 m
g
(BET) which were characterized by powder X-ray diffraction,
Al solid-state NMR and transmission electron microscopy. During the short-lived synthesis, highly disordered γ-alumina progressively transforms into a mixture of δ and θ-alumina. For the γ-alumina particles, only for particles with the highest specific area a significant amount of five-coordinated Al can be found which is only partially located in the particle surface. Water can be bound reversibly and increases the coordination number of aluminium atoms in the particle surface. For the well-crystallized mixture of δ and θ-alumina, high resolution and high S/N powder XRD pattern features a large number of superstructure reflections along with the commonly observed diffuse reflections.
Al MQMAS NMR provides a total of 8 crystallographic sites with an unusually high resolution in the tetrahedral region, with 4 distinct AlO
sites pertaining to the δ phase alone. The results suggest that the δ-alumina phase produced in this process can be described as an ordered structure.</abstract><cop>England</cop><pub>Royal Society of Chemistry</pub><pmid>39129482</pmid><doi>10.1039/d4dt01809e</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0003-2294-796X</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1477-9226 |
| ispartof | Dalton transactions : an international journal of inorganic chemistry, 2024-08, Vol.53 (34), p.14246-14257 |
| issn | 1477-9226 1477-9234 1477-9234 |
| language | eng |
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| source | Royal Society Of Chemistry Journals; Alma/SFX Local Collection |
| subjects | Alumina Aluminum chloride Aluminum oxide Atomic properties Coordination numbers Crystallization Crystallography High resolution Mixtures NMR Nuclear magnetic resonance Superstructures Transitional aluminas X ray powder diffraction |
| title | Structure and phase changes of alumina produced by flame hydrolysis |
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