Elementary Steps of Faujasite Formation Followed by in Situ Spectroscopy.
Saved in:
| Title: | Elementary Steps of Faujasite Formation Followed by in Situ Spectroscopy. |
|---|---|
| Authors: | Prodinger, Sebastian1, Vjunov, Aleksei1, Jian Zhi Hu1, Fulton, John L.1, Camaioni, Donald M.1, Derewinski, Miroslaw A.1 miroslaw.derewinski@pnnl.gov, Lercher, Johannes A.1,2 Johannes.Lercher@pnnl.gov |
| Source: | Chemistry of Materials. 2/13/2018, Vol. 30 Issue 3, p888-897. 10p. |
| Subjects: | Zeolite Y, Nuclear magnetic resonance spectroscopy, Autocatalysis, Magic angle spinning, Chemical kinetics |
| Abstract: | Ex situ and in situ spectroscopy was used to identify the kinetics of processes during the formation of the faujasite (FAU) zeolite lattice from a hydrous gel. Using solid-state 27Al magic angle spinning (MAS) nuclear magnetic resonance (NMR), the autocatalytic transformation from the amorphous gel into the crystalline material was monitored. Al X-ray absorption near-edge structure shows that most Al already adopts a tetrahedral coordination in the X-ray-amorphous aluminosilicate at the beginning of the induction period, which hardly changes throughout the rest of the synthesis. Using 23Na NMR spectroscopy, environments in the growing zeolite crystal were identified and used to define the processes in the stepwise formation of the zeolite lattice. The end of the induction period was accompanied by a narrowing of the 27Al and 23Na MAS NMR peak widths, indicating the increased level of long-range order. The experiments show conclusively that the formation of faujasite occurs via the continuous formation and subsequent condensation of intermediary sodalite-like units that constitute the key building block of the zeolite. [ABSTRACT FROM AUTHOR] |
| Copyright of Chemistry of Materials is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 128011711 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Elementary Steps of Faujasite Formation Followed by in Situ Spectroscopy. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Prodinger%2C+Sebastian%22">Prodinger, Sebastian</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Vjunov%2C+Aleksei%22">Vjunov, Aleksei</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jian+Zhi+Hu%22">Jian Zhi Hu</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fulton%2C+John+L%2E%22">Fulton, John L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Camaioni%2C+Donald+M%2E%22">Camaioni, Donald M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Derewinski%2C+Miroslaw+A%2E%22">Derewinski, Miroslaw A.</searchLink><relatesTo>1</relatesTo><i> miroslaw.derewinski@pnnl.gov</i><br /><searchLink fieldCode="AR" term="%22Lercher%2C+Johannes+A%2E%22">Lercher, Johannes A.</searchLink><relatesTo>1,2</relatesTo><i> Johannes.Lercher@pnnl.gov</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Chemistry+of+Materials%22">Chemistry of Materials</searchLink>. 2/13/2018, Vol. 30 Issue 3, p888-897. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Zeolite+Y%22">Zeolite Y</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+magnetic+resonance+spectroscopy%22">Nuclear magnetic resonance spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Autocatalysis%22">Autocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Magic+angle+spinning%22">Magic angle spinning</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+kinetics%22">Chemical kinetics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Ex situ and in situ spectroscopy was used to identify the kinetics of processes during the formation of the faujasite (FAU) zeolite lattice from a hydrous gel. Using solid-state 27Al magic angle spinning (MAS) nuclear magnetic resonance (NMR), the autocatalytic transformation from the amorphous gel into the crystalline material was monitored. Al X-ray absorption near-edge structure shows that most Al already adopts a tetrahedral coordination in the X-ray-amorphous aluminosilicate at the beginning of the induction period, which hardly changes throughout the rest of the synthesis. Using 23Na NMR spectroscopy, environments in the growing zeolite crystal were identified and used to define the processes in the stepwise formation of the zeolite lattice. The end of the induction period was accompanied by a narrowing of the 27Al and 23Na MAS NMR peak widths, indicating the increased level of long-range order. The experiments show conclusively that the formation of faujasite occurs via the continuous formation and subsequent condensation of intermediary sodalite-like units that constitute the key building block of the zeolite. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Chemistry of Materials is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=128011711 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1021/acs.chemmater.7b04554 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 888 Subjects: – SubjectFull: Zeolite Y Type: general – SubjectFull: Nuclear magnetic resonance spectroscopy Type: general – SubjectFull: Autocatalysis Type: general – SubjectFull: Magic angle spinning Type: general – SubjectFull: Chemical kinetics Type: general Titles: – TitleFull: Elementary Steps of Faujasite Formation Followed by in Situ Spectroscopy. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Prodinger, Sebastian – PersonEntity: Name: NameFull: Vjunov, Aleksei – PersonEntity: Name: NameFull: Jian Zhi Hu – PersonEntity: Name: NameFull: Fulton, John L. – PersonEntity: Name: NameFull: Camaioni, Donald M. – PersonEntity: Name: NameFull: Derewinski, Miroslaw A. – PersonEntity: Name: NameFull: Lercher, Johannes A. IsPartOfRelationships: – BibEntity: Dates: – D: 13 M: 02 Text: 2/13/2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 08974756 Numbering: – Type: volume Value: 30 – Type: issue Value: 3 Titles: – TitleFull: Chemistry of Materials Type: main |
| ResultId | 1 |
