2D zeolite coatings: Langmuir-Schaefer deposition of 3 nm thick MFI zeolite nanosheets

Neel Rangnekar, Meera Shete, Kumar Varoon Agrawal, Berna Topuz, Prashant Kumar, Qiang Guo, Issam Ismail, Abdulrahman Alyoubi, Sulaiman Basahel, Katabathini Narasimharao, Christopher W. Macosko, K. Andre Mkhoyan, Shaeel Al-Thabaiti, Benjamin Stottrup, Michael Tsapatsis

Research output: Contribution to journalArticle

45 Scopus citations

Abstract

Stable suspensions of zeolite nanosheets (3 nm thick MFI layers) were prepared in ethanol following acid treatment, which partially removed the associated organic structure-directing agent. Nanosheets from these suspensions could then be dispersed at the air-water interface and transferred to silicon wafers using Langmuir-Schaefer deposition. Using layer-by-layer deposition, control on coating thickness was demonstrated. In-plane X-ray diffraction (XRD) revealed that the deposited nanosheets contract upon calcination similar to bulk MFI crystals. Different methods for secondary growth resulted in preferentially oriented thin films of MFI, which had sub-12-nm thickness in certain cases. Upon calcination, there was no contraction detectable by in-plane XRD, indicating well-intergrown MFI films that are strongly attached to the substrate.

Original languageEnglish (US)
Pages (from-to)6571-6575
Number of pages5
JournalAngewandte Chemie - International Edition
Volume54
Issue number22
DOIs
StatePublished - May 1 2015

Keywords

  • Langmuir trough
  • nanosheets
  • surface chemistry
  • thin films
  • zeolites

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    Rangnekar, N., Shete, M., Agrawal, K. V., Topuz, B., Kumar, P., Guo, Q., Ismail, I., Alyoubi, A., Basahel, S., Narasimharao, K., Macosko, C. W., Mkhoyan, K. A., Al-Thabaiti, S., Stottrup, B., & Tsapatsis, M. (2015). 2D zeolite coatings: Langmuir-Schaefer deposition of 3 nm thick MFI zeolite nanosheets. Angewandte Chemie - International Edition, 54(22), 6571-6575. https://doi.org/10.1002/anie.201411791