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- Title
Synthesis and Characterization of Multistage Porous Sodalite Nanocrystal Aggregate.
- Authors
Liu, Zhigang; Yu, Yaxin; Wang, Chunmei; Yang, Lirong
- Abstract
Using the mixed solution of n -butanol and ethanol as solvent, the sodalite nanocrystal aggregate was prepared by the solvothermal method. The influences of crystallization temperature, molar ratio Na/Al, crystallization time and silane concentration on the morphology, crystallite size, degree of crystallization and pore structure of the as-prepared samples were investigated by X-ray diffraction (XRD), BET, FTIR, Transmission Electron Microscopy (TEM) and scanning electron microscope (SEM). The results reveal that the sodalite nanocrystals are aggregated by self-assembly into the micropore–mesopore–macropore structure. Higher crystallization temperature and longer crystallization time are conducive to the growth of sodalite nanocrystals. It is a necessary condition for the formation of sodalite nanocrystals to keep high molar ratio Na/Al. The higher the molar ratio Na/Al, the more favorable the crystallization of sodalite nanocrystals. The appropriate concentration of silane agent is conducive to the preparation of smaller crystal-sized sodalite nanocrystals. After removing the silane agent by pickling, the sodalite nanocrystal aggregate is a multistage porous structure with the pore volume of 1.0133 mL/g and the specific surface area of 449.73 m2/g. The preparation of nanocrystal sodalite by solvothermal method, the introduction of Hexadecyltrimethoxysilane as a surfactant, followed by acid pickling to remove the surfactant, produced multistage porous sodalite nanocrystal aggregate, greatly improving the mass transfer rate of sodalite, making it applicable to a wider range of fields.
- Subjects
SODALITE; SCANNING electron microscopes; POROSITY; NANOCRYSTALS; TRANSMISSION electron microscopy; MASS transfer; SOLVENTS
- Publication
NANO, 2023, Vol 18, Issue 10, p1
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292023500789