Abstract
Well-defined silicalite-1 crystals with intracrystalline mesopores were successfully synthesized in the presence of 3-glycidoxypropyl-trimethoxysilane (GPTMS) and polyethylene glycol (PEG) from a hydrothermal synthetic system. Various techniques, such as XRD, SEM, TEM, TGA, and Ar adsorption, were used to characterize the textural properties of the obtained hierarchical silicalite-1. The results indicated that the addition of GPTMS to the silicalite-1 synthesis system could bring some mesopores in the silicate-1 crystals. While PEG, as a mesoporogen, was added along with GPTMS, silicalite-1 crystals with abundant intramesoporosity were obtained. The liquid-phase absorption of xylene isomers (p/o) on the hierarchical silicalite-1 indicated that the hierarchical silicalite-1 showed better absorption properties in terms of both adsorption rate and capacity for p-xylene, compared to silicalite-1 crystals synthesized in the absence of GPTMS and PEG.
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Financial support by the National Natural Science Foundation of China (22075253) is gratefully acknowledged. QX also gratefully acknowledges the financial support from the State Key Laboratory of Green Chemistry Synthesis Technology (Zhejiang University of Technology, Hangzhou 310032).
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Chu, L., Wang, Z., Yang, Y. et al. Synthesis and xylene isomers adsorption of silicalite-1 crystals with intracrystalline mesopores aided by 3-glycidoxypropyl-trimethoxysilane and polyethene glycol. J Porous Mater 28, 1667–1674 (2021). https://doi.org/10.1007/s10934-021-01110-3
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DOI: https://doi.org/10.1007/s10934-021-01110-3