Zeolite RHO Synthesis Accelerated by Ultrasonic Irradiation Treatment

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Abstract

In recent years, there are increasing interest on applying ultrasonic irradiation for the synthesis of zeolite due to its advantages including remarkable shortened synthesis duration. In this project, the potential of ultrasonic irradiation treatment on the synthesis of zeolite RHO was investigated. Ultrasonic irradiation treatment time was varied from 30 to 120 minutes for the synthesis of zeolite RHO. The zeolite RHO solid samples were characterized with X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA) and nitrogen adsorption-desorption analysis. The application of ultrasonic irradiation treatment in this study has accelerated the synthesis of zeolite RHO where the synthesis duration has been significantly shortened to 2 days compared to 8 days required by conventional hydrothermal heating without ultrasonic irradiation treatment. Highly crystalline zeolite RHO crystals in truncated octahedron morphology were successfully formed.

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Applications of ultrasound to the synthesis of nanostructured materials.

Jin Ho Bang, Kenneth Suslick (2010)

Recent advances in nanostructured materials have been led by the development of new synthetic methods that provide control over size, morphology, and nano/microstructure. The utilization of high intensity ultrasound offers a facile, versatile synthetic tool for nanostructured materials that are often unavailable by conventional methods. The primary physical phenomena associated with ultrasound that are relevant to materials synthesis are cavitation and nebulization. Acoustic cavitation (the formation, growth, and implosive collapse of bubbles in a liquid) creates extreme conditions inside the collapsing bubble and serves as the origin of most sonochemical phenomena in liquids or liquid-solid slurries. Nebulization (the creation of mist from ultrasound passing through a liquid and impinging on a liquid-gas interface) is the basis for ultrasonic spray pyrolysis (USP) with subsequent reactions occurring in the heated droplets of the mist. In both cases, we have examples of phase-separated attoliter microreactors: for sonochemistry, it is a hot gas inside bubbles isolated from one another in a liquid, while for USP it is hot droplets isolated from one another in a gas. Cavitation-induced sonochemistry provides a unique interaction between energy and matter, with hot spots inside the bubbles of approximately 5000 K, pressures of approximately 1000 bar, heating and cooling rates of >10(10) K s(-1); these extraordinary conditions permit access to a range of chemical reaction space normally not accessible, which allows for the synthesis of a wide variety of unusual nanostructured materials. Complementary to cavitational chemistry, the microdroplet reactors created by USP facilitate the formation of a wide range of nanocomposites. In this review, we summarize the fundamental principles of both synthetic methods and recent development in the applications of ultrasound in nanostructured materials synthesis.

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The Chemical Effects of Ultrasound

Kenneth Suslick (1989)

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Accelerated crystallization of zeolites via hydroxyl free radicals.

Guodong Feng, Peng Cheng, Wenfu Yan … (2016)

In the hydrothermal crystallization of zeolites from basic media, hydroxide ions (OH(-)) catalyze the depolymerization of the aluminosilicate gel by breaking the Si,Al-O-Si,Al bonds and catalyze the polymerization of the aluminosilicate anions around the hydrated cation species by remaking the Si,Al-O-Si,Al bonds. We report that hydroxyl free radicals (•OH) are involved in the zeolite crystallization under hydrothermal conditions. The crystallization processes of zeolites-such as Na-A, Na-X, NaZ-21, and silicalite-1-can be accelerated with hydroxyl free radicals generated by ultraviolet irradiation or Fenton's reagent.

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Author and article information

Contributors

Thiam Leng Chew: thiamleng.chew@utp.edu.my

Journal

Journal ID (nlm-ta): Sci Rep

Journal ID (iso-abbrev): Sci Rep

Title: Scientific Reports

Publisher: Nature Publishing Group UK (London )

ISSN (Electronic): 2045-2322

Publication date (Electronic): 21 October 2019

Publication date PMC-release: 21 October 2019

Publication date Collection: 2019

Volume: 9

Electronic Location Identifier: 15062

Affiliations

[1 ]ISNI 0000 0004 0634 0540, GRID grid.444487.f, Department of Chemical Engineering, Faculty of Engineering, , Universiti Teknologi PETRONAS, ; 32610 Seri Iskandar, Perak Malaysia

[2 ]ISNI 0000 0004 0634 0540, GRID grid.444487.f, CO2 Research Centre (CO2RES), Institute of Contaminant Management, , Universiti Teknologi PETRONAS, ; 32610 Seri Iskandar, Perak Malaysia

[3 ]Curtin University Malaysia, Faculty of Engineering and Science, Chemical Engineering Department, 250CDT, 98009 Miri, Sarawak Malaysia

[4 ]ISNI 0000 0004 1937 1055, GRID grid.264580.d, Department of Chemical and Materials Engineering, , Tamkang University, ; New Taipei City, 25137 Taiwan

Article

Publisher ID: 51460

DOI: 10.1038/s41598-019-51460-x

PMC ID: 6803675

PubMed ID: 31636339

SO-VID: 90405cda-d297-4fdc-99d0-577a8f20a279

License:

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

History

Date received : 28 May 2019

Date accepted : 27 September 2019

Funding

Funded by: FundRef https://doi.org/10.13039/501100005710, Universiti Teknologi Petronas (Petronas Technology University);

Award ID: 0153AA-H43

Award Recipient : Tiffany Yit Siew Ng Thiam Leng Chew Yin Fong Yeong Zeinab Abbas Jawad Chii-Dong Ho

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ScienceOpen disciplines: Uncategorized

Keywords: synthesis and processing

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ScienceOpen disciplines: Uncategorized

Keywords: synthesis and processing

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Zeolite RHO Synthesis Accelerated by Ultrasonic Irradiation Treatment

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Abstract

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Most cited references 35

Applications of ultrasound to the synthesis of nanostructured materials.

The Chemical Effects of Ultrasound

Accelerated crystallization of zeolites via hydroxyl free radicals.

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