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The preparation and characterisation of the high ordered Ga-SBA-15 with high gallium loading

Abstract The high gallium content and ordered mesoporous Ga-SBA-15 materials were prepared via a direct sol–gel hydrothermal approach. X-ray fluorescence, wide angle X-ray diffraction, nitrogen adsorption–desorption analysis, transmission electron microscopy, small-angle X-ray scattering and scanning electron microscopy are used to characterise the materials, and analysis of these results shows that the structure of these materials with different Si/Ga ratios is excellently ordered. Furthermore, the data of small-angle X-ray scattering and nitrogen adsorption–desorption analysis proved that the wall thickness of mesoporous Ga-SBA-15 materials was decreased by increasing the gallium content. Adsorption of xylene and hydroquinone over the different Si/Ga molar ratios of these materials was explored and the findings showed that SBA-15 did not perform as well.