Thongkam M, Woramongkolchai S, Saowsupa S, Rungrojchaipon P. A Facile Method to Synthesize b-Oriented Silicalite-1 Thin Film.
MEMBRANES 2022;
12:520. [PMID:
35629846 PMCID:
PMC9147600 DOI:
10.3390/membranes12050520]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/03/2022] [Accepted: 05/08/2022] [Indexed: 02/04/2023]
Abstract
Silicalite-1 thin film was prepared with the following batch composition-3TPAOH:25TEOS:1450H2O:100EtOH-and synthesized using the hydrothermal technique. Silicalite-1 colloidal crystals were successfully coated on the surface of the silica substrate by the dip-coating method. The investigation of silicalite-1 thin film with organic structure-directing agents (SDA), using a seeding technique with various colloidal seed concentrations, number of dip-coating steps, and crystallization time, were systematically discussed and obtained interesting results. Silicalite-1 powder and Silicalite-1 membrane, the patterns of which showed a unique characteristic crystallography of MFI topology, were characterized by XRD, which indicated the preferred orientation along the b-axis perpendicular to the substrate surface. The morphology and crystal size aspect of Silicalite-1 were also examined by a scanning electron microscope (SEM).
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