Abstract
Under typical dilute reactant compositions (3 ~ 5 wt% of surfactant template concentration) and conventional hydrothermal conditions for mesoporous materials synthesis, successful preparation of hierarchically macro/mesoporous silica monoliths was reported in this paper. The resultant materials were characterized by a series of techniques including powder X-ray diffraction, N2 adsorption–desorption, SEM, TEM/EDS, and Hg porosimetry. A new kind of stable and hierarchically porous pure silica monoliths was confirmed, which are featured with highly ordered mesoporous structures, rod-shaped unit particles, large specific surface area of 492 m2/g, continuous macropores of about 4.0 μm in size and high macropore volume of about 13.1 cm3/g. Moreover, using the resultant silica monoliths as hard templates, carbon monoliths have been successfully replicated, which inherit the structural characters of parent silica materials.
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This work was supported by the Natural Science Foundation of China (Grant No. 20633090 and 20703055) and Shanghai Science & Technology Committee (Grant No. 06ZR14163).
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Hua, Z.L., Gao, J.H., Bu, W.B. et al. Hierarchically macro/mesoporous silica monoliths constructed with interconnecting micrometer-sized unit rods. J Sol-Gel Sci Technol 50, 22–27 (2009). https://doi.org/10.1007/s10971-009-1899-0
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DOI: https://doi.org/10.1007/s10971-009-1899-0