SO_4~（2－）／ZrO_2超强酸催化剂的结构表征

用ＢＥＴ法分析了制备条件对ＳＯ＿４￣（２－）／ＺｒＯ＿２超强酸催化剂的比表面和孔结构的影响，用ＳＥＭ观察了催化剂的表面形貌。结果表明，引人ＳＯ＿４￣（２－）后催化剂的比表面和比表面的热稳定性都增大了，在Ｈ＿２ＳＯ＿４浓度为１．０ｍｏｌ／１和焙烧温度约７７３Ｋ时催化剂的比表面较大。制备Ｚｒ（ＯＨ）＿４时用浓氨水得到的催化剂的比表面、平均孔径和孔体积都较大。ＳＯ＿４￣（２－）／ＺｒＯ＿２催化剂的孔为平均孔径３－５ｎｍ的中孔。ＳＥＭ结果表明，ＳＯ＿４￣（２－）／ＺｒＯ＿２催化剂的表面为很不平整的蜂窝状。

The structural Characterization of SO_4￣(2-)/ZrO_2 Superacid Catalyst

The effects of preparatiOn conditions on the surface area,porous structure of SO￣(2-)_4/ZrO_2superacid catalyst and catalyst morphology were studied by BET method and SEM respectively. It is found that the incorporation of SO￣(2-)_4increases the surface area of zircoiiiumdioxide and promotes the thermal stability of the surface area. When H_2SO_4 concentration is1.0mo1/1 and calcination temperature ca. 773K, the catalyst possesses higlier surface area.Concentrated NH_3·H_2O for Zr(OH)_4 preparation gives better results of surface area,porediameter and pore volume。The pores of SO_4￣(2-) /ZrO_2 catalysts are mainly mesopores of 3.0─5.0nm in pore radius and the morphology of the catalyst is of the honeycomb-type.