Ordered Mesoporous Zeolite Thin Films with Perpendicular Reticular Nanochannels of Wafer Size Area

Hsueh Jen Chang, Tzu Ying Chen, Zi Ping Zhao, Zih Jyun Dai, Yu Lin Chen, Chung Yuan Mou, Yi Hsin Liu

研究成果: 雜誌貢獻文章

2 引文 斯高帕斯(Scopus)

摘要

Highly ordered mesoporous zeolite thin films (MZTFs) are grown at rigid substrates via molecular interaction from ternary structure-directing agents (SDAs) in a Stöber-like condition. The ultrathin films (10-20 nm) were deposited layer-by-layer via self-assembly of β-zeolite seeds and SDAs at 40-50 °C, resulting reticular cellular pores and perpendicular nanochannels with average pore sizes (6.7 ± 1.1 nm). The walls of the nanochannels consist of zeolitic structures in microcrystallines. Compared to cylindrical mesochannels of amorphous silica thin films, the MZTFs with reticular mesochannels demonstrate 5R/6R stretching modes (550-650 cm-1) and significantly enhanced hydrothermal stability. The MZTFs were characterized in top-view and cross-sectional electron microscopies (SEM/HRSEM/HRTEM) as well as X-ray scattering techniques (GIXRD/GISAXS), which confirm a body-centered tetragonal (Im3m) unit cell with unique Moiré patterns. Upon calcination, the film thickness is reduced to 10.6 nm with a structure transformation to a hexagonal phase. The hydrothermally stable MZTFs can serve as excellent hard templates for growing dense nanoparticle arrays and confining their diameters to well-defined sizes (4.8 ± 1.3 nm).

原文英語
頁(從 - 到)8303-8313
頁數11
期刊Chemistry of Materials
30
發行號22
DOIs
出版狀態已發佈 - 2018 十一月 27

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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