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Highly dispersed zinc phosphate microdomains in mesoporous silica |
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| Authors: | Asim Bhaumik Sujit Samanta Prashant Kumar |
| Affiliation: | a Department of Materials Science, Indian Association for the Cultivation of Science, 2A & B Raja S.C. Mullick Road, Jadavpur, Kolkata 700 032, India b Dynamic Materials Research Group, National Institute of Advance Science and Technology (AIST), Osaka 563-8577, Japan c Technical Chemistry and Heterogenous Catalysis, Aachen University, Aachen- 52074, Germany d Materials Science Department, National University of Singapore, Kent Ridge Road, Singapore 17542, Singapore |
| Abstract: | In situ immobilization of crystalline zinc phosphate nuclei in the mesoporous silica material resulted in a highly ordered 2D-hexagonal mesoporous material with evenly dispersed crystalline NaZnPO4 microdomains in its matrix using the self-assembly of cationic surfactant under hydrothermal synthesis condition. Four samples with different Si:Zn:P:Na mole ratios have been prepared. X-ray diffraction (XRD) patterns of the as-synthesized as well as template-free samples indicated the presence of mesophase in each case. N2 adsorption data indicated mesoporosity in the samples together with the existence of crystalline NaZnPO4 phase for the materials synthesized with Si/Zn mole ratio 5-12. 29Si MAS NMR results showed high value of the Q4/Q3 ratio in these materials suggesting highly crosslinked structure. |
| Keywords: | Immobilization Mesoporous silica Microstructure Zeolites Zinc phosphate |
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