【摘要】 本工作用溶胶－凝胶法制备复合氧化物ＮｉＯ－ＴｉＯ２－ＳｉＯ２体系．其物化性质的表征结果表明，这是一类酸性强、大比表面积、细孔隙的材料，是非晶态体系．通过改变反应的制备条件和／或加入表面活性剂，可以较大地调变上述体系的孔结构特征．更多还原

【Abstract】 Complex oxides, NiO-TiO2-SiO2, prepared by sol-gel method. The charactcrization of the multicomponent system has shown that it is a porous material with high acidity, big surface area, and belongs to noncrystallizcd syslem. Its pore structure, e. g. the range o r surface area and the Size of specific pore volume, can be modified by the changes of reaction conditions and / or the use or surfants.更多还原