Broadening the Scope for Fluoride‐Free Synthesis of Siliceous Zeolites
Abstract
Abstract Siliceous zeolites are ideally suited for emerging applications in gas separations, sensors, and the next generation of low‐ k dielectric materials, but the use of fluoride in the synthesis significantly hinders their commercialization. Herein, we show that the dry gel conversion (DGC) technique can overcome this problem. Fluoride‐free synthesis of two siliceous zeolites—AMH‐4 (CHA‐type) and AMH‐5 (STT‐type), has been achieved for the first time using the method. Siliceous *BEA‐, MFI‐, and *MRE‐type zeolites have also been synthesized to obtain insights into the crystallization process. Charge‐balancing interactions between the inorganic cation, organic structure‐directing agent (OSDA), and Si−O − defects are found to be an essential aspect. We quantify this factor in terms of the “OSDA charge/silica ratio” of the as‐made zeolites and demonstrate that the DGC technique is broadly applicable and opens up new avenues for fluoride‐free siliceous zeolite synthesis.
- Authors:
-
- Department of Chemical Engineering University of Massachusetts Amherst 686 N Pleasant St Amherst MA 01003 USA
- Department of Polymer Science &, Engineering University of Massachusetts Amherst 120 Governor's Dr Amherst MA 01003 USA
- Department of Chemical Engineering University of Massachusetts Amherst 686 N Pleasant St Amherst MA 01003 USA, School of Chemical Engineering Northwest University Xi'an Shanxi 710069 China
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1422019
- Resource Type:
- Journal Article: Publisher's Accepted Manuscript
- Journal Name:
- Angewandte Chemie (International Edition)
- Additional Journal Information:
- Journal Name: Angewandte Chemie (International Edition) Journal Volume: 57 Journal Issue: 14; Journal ID: ISSN 1433-7851
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Vattipalli, Vivek, Paracha, Abdul Mughis, Hu, Weiguo, Chen, Huiyong, and Fan, Wei. Broadening the Scope for Fluoride‐Free Synthesis of Siliceous Zeolites. Germany: N. p., 2018.
Web. doi:10.1002/anie.201712684.
Vattipalli, Vivek, Paracha, Abdul Mughis, Hu, Weiguo, Chen, Huiyong, & Fan, Wei. Broadening the Scope for Fluoride‐Free Synthesis of Siliceous Zeolites. Germany. https://doi.org/10.1002/anie.201712684
Vattipalli, Vivek, Paracha, Abdul Mughis, Hu, Weiguo, Chen, Huiyong, and Fan, Wei. 2018.
"Broadening the Scope for Fluoride‐Free Synthesis of Siliceous Zeolites". Germany. https://doi.org/10.1002/anie.201712684.
@article{osti_1422019,
title = {Broadening the Scope for Fluoride‐Free Synthesis of Siliceous Zeolites},
author = {Vattipalli, Vivek and Paracha, Abdul Mughis and Hu, Weiguo and Chen, Huiyong and Fan, Wei},
abstractNote = {Abstract Siliceous zeolites are ideally suited for emerging applications in gas separations, sensors, and the next generation of low‐ k dielectric materials, but the use of fluoride in the synthesis significantly hinders their commercialization. Herein, we show that the dry gel conversion (DGC) technique can overcome this problem. Fluoride‐free synthesis of two siliceous zeolites—AMH‐4 (CHA‐type) and AMH‐5 (STT‐type), has been achieved for the first time using the method. Siliceous *BEA‐, MFI‐, and *MRE‐type zeolites have also been synthesized to obtain insights into the crystallization process. Charge‐balancing interactions between the inorganic cation, organic structure‐directing agent (OSDA), and Si−O − defects are found to be an essential aspect. We quantify this factor in terms of the “OSDA charge/silica ratio” of the as‐made zeolites and demonstrate that the DGC technique is broadly applicable and opens up new avenues for fluoride‐free siliceous zeolite synthesis.},
doi = {10.1002/anie.201712684},
url = {https://www.osti.gov/biblio/1422019},
journal = {Angewandte Chemie (International Edition)},
issn = {1433-7851},
number = 14,
volume = 57,
place = {Germany},
year = {Wed Feb 21 00:00:00 EST 2018},
month = {Wed Feb 21 00:00:00 EST 2018}
}
Web of Science
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