Mesoporous silica MCM-41 with rod-shaped morphology: Synthesis and characterization |
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Authors: | Sreyashi JanaBuddhadeb Dutta Hisashi HondaSubratanath Koner |
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Affiliation: | a Department of Chemistry, Jadavpur University, Kolkata 700 032, Indiab International Graduate School of Arts and Sciences, Yokohama City University, Seto, Yokohama, 236-0027, Japan |
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Abstract: | A new synthesis route has been established to prepare highly pure mesoporous silica material (Si-MCM-41) with rod-like morphology. To improve the stability and to bring about the long range ordering in the mesoporous material, a series of tetra-alkylammonium salts has been employed in the new procedure in addition to the surfactant, cetyl-trimethylammonium bromide. The mesoporous silica materials have been characterized by small-angle X-ray diffraction (SAX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 sorption and solid state 29Si NMR measurements. The XRD study revealed that an excellent long range structural ordering of mesoporous material can be achieved using tetra-butylammonium bromide as a promoter. SEM study showed that rod-shaped single crystal like particles were formed in hydrothermal synthesis. TEM study revealed the presence of hexagonal voids on the face of the rod-shaped particles while nitrogen sorption study establishes the mesoporosity of the material. A high degree of cross-linking of -Si-O-Si- networks in the mesoporous silica has been evidenced in 29Si NMR study. |
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Keywords: | Mesoporous silica Hydrothermal synthesis Tetra-alkylammonium bromide SEM 29Si NMR |
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