Abstract
A series of phosphotungstic acid (HPW)/SiO2 materials with hierarchical meso/macroporous structure were synthesized by evaporation-induced self-assembly method (EISA), using nonionic surfactant (P123) and polystyrene (PS) spheres as templates. SEM images displayed uniform macropores with an average pore size of 210 nm. TEM, small-angle XRD and N2 adsorption–desorption isotherms confirmed the existence of the ordered mesoporous structures, embedded in the wall of macropores. The wild-angle XRD and FT-IR spectra proved Keggin-type HPW dispersed homogeneously in the silica framework. With the amount of added PS spheres, the density of the macropores increased, the hierarchically ordered porous HPW/SiO2 possessed two-dimensional (2D) hexagonal (p6mm) mesostructures and uniform periodic macropores. The ODS catalytic activity of these samples were tested, the result showed that the meso/macroporous HPW/SiO2 catalyst with proper PS beads usage displayed much higher catalytic activity than other catalysts. In addition, the reusability of the meso/macroporous HPW/SiO2 catalyst was investigated, the activity of catalyst has not obviously decreased even after eight times.
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This work was financially supported by the National Nature Science Foundation of China (No. 21476177).
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Yue, D., Lei, J., Peng, Y. et al. Hierarchical ordered meso/macroporous H3PW12O40/SiO2 catalysts with superior oxidative desulfurization activity. J Porous Mater 25, 727–734 (2018). https://doi.org/10.1007/s10934-017-0486-y
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DOI: https://doi.org/10.1007/s10934-017-0486-y