大比表面层柱磷酸锡的制备和催化性能

Preparation and Catalytic Behaviour of Cr_2O_3-Pillared Tin Phosphate with High Surface Area

详细研究了氧化铬层柱磷酸锡的制备规律，革新了文献中丙胺加大量季铵盐的两步胶体化法，用有机胺使层板一步胶体化成功地制备了高比表面积的层柱磷酸锡，其最高比表面积达445m2／g。样品经400℃焙烧后仍具有良好的层柱结构，可形成规整的平行板型中孔，孔径集中在1．7～5nm范围内．丙醇脱水和异丙苯裂解反应表明氧化锆层柱磷酸锡具有弱酸催化活性；环己烷脱氢反应表明，氧化铬层柱磷酸锡比负载型氧化铬催化剂有更高的脱氢活性．

The preparation of Cr2O3-pillared tin phosphate was studied in detail. The previ-ous method with two-step colloidization by propylamine and a great amount of NMe4Cl was innovated, and Cr2O3-pillared tin phosphate samples with a high surface area were prepared successfully through one-step colloidization by various ammes. The surface area of the sam-ples prepared reached 445m2/g, which was much higher than the value 380m2/g reported in literatures. After calcination at 400℃ the samples possess a prefect pillared structure and uniform slit-shaped mesopores with diameters between 1.7~5.0nm.The Cr2O3-pillared tin phosphate samples are weakly acidic, and are catalytically active for dehydration of iso-propanol and n-propanol. The cyclohexane dehydrogenation activity of the samples are high-er than that of a conventional Cr2O3 supported catalyst, showing that Cr2O3 in the pillared catalysts is in highly dispensed state.