α-磷酸锆类系列层柱化合物的孔隙结构特征

Study on the pore structure of α zirconium phosphate type pillared compounds

以低温氮吸附法为手段， 对α磷酸锆（αＺｒＰ）类系列层柱化合物的孔隙结构特征进行了研究。结果表明，此类物质的孔隙结构特征比较相似， 均系过渡孔发达物质。首次提出了Ｄ点法计算比表面积的方法， 并采用三参数ＢＥＴ 方程、平行板等效模型和Ｄ点法分别计算了层柱化合物的比表面积， 得到了一致的结果， 这说明引用的模型和方法是可行的和合理的， 结果是可信的。另外通过对影响孔隙结构因素的分析， 得出层柱化合物比表面积和孔容与各自的层间距和柱密度的大小密切相关， 同时也与层离和层交联的发生有关。

Adsorption isotherms of nitrogen at the low temperature on α zirconium phosphate type pillared compounds were determined The specific surface areas of six samples were also calculated by three constant BET method, parallel plate model method and D dot method, respectively The results of the three methods are in good agreement with each other, so the values of specific surface area are believable and the applied methods are feasible and reasonable At last, it is declared that their pore structure and specific surface areas are decided by density of pillar, interlayer spacing , layer departure and layer joint.