Preparation of High Specific Surface Area Alumina-Titania Binary Aerogel Beads
Abstract: Crack-free and high surface area mesoporous alumina-titania binary aerogel beads have been synthesized by sol-gel technology, the ball dropping method (BDM), extended aging and gradient drying method with pseudo boehmite and dehydrate titanyl sulfate as precursors and water as solvent. The effects of composition and calcination temperature on pore structure and acid amounts have been investigated and discussed. The binary aerogel beads have been charac-terized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), Fourier-transform infrared spectros-copy (FT-IR), solid state nuclear magnetic resonance (NMR), nitrogen adsorption/desorption analysis and ammonia- temperature programmed desorption (TPD). The obtained aerogel beads show surface area of 200 m2/g and acid amounts of 0.8 mmol NH3/g respectively. The binary aerogel beads with different constitutes show similar specific sur-face area and acid amounts. The pore size of aerogel beads can be modified by changing composition and calcination temperature.
文章引用: 李 想 , 秦国彤 , 王亚涛 , 魏微 (2013) 高比表面积Al2O3-TiO2二元气凝胶小球的制备。 化学工程与技术， 3， 86-90. doi: 10.12677/HJCET.2013.33016
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