期刊
CHEMISTRY OF MATERIALS
卷 30, 期 10, 页码 3545-3551出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.8b01346
关键词
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资金
- Center for Gas Separations Relevant to Clean Energy Technologies, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0001015]
- National Science Foundation [CBET-1705687]
- NSF [MRI DMR-1229263]
Directly synthesized zeolite MFI nanosheets are promising building blocks for MFI thin films with large and oriented grains. The secondary growth of MFI nanosheets on Si wafers in tetraethylammonium hydroxide (TEAOH) silica sols was investigated, and conditions that result in well-oriented and intergrown film microstructure were established. This has enabled the fabrication of thin (similar to 300 nm) b-oriented MFI films with large grain-size (>2 mu m) from seed-removed nanosheet monolayer coatings. Moreover, the faceted and anisotropic shape of MFI nanosheets allowed the measurement of MFI growth in different crystallographic directions and confirmed the twinning-free preferential growth along the c-axis (a lateral direction of the nanosheet), compared to the b-axis (the direction normal to the nanosheet basal plane), with ratios in a range between 4 and 11.
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