以正硅酸乙酯(TEOS)和乙氧基锗(Ge(OC2H5)4)为前驱体通过溶胶-凝胶法制备Ge掺杂的二氧化硅溶胶,采用浸渍提拉法在γ-Al2O3/α-Al2O3多孔陶瓷支撑体上成膜,通过动态光散射(DLS)技术和气体渗透法,研究制备条件对Ge掺杂二氧化硅膜溶胶粒径和氢气渗透与分离性能的影响.结果表明溶胶胶粒随着温度、Ge的掺杂量、醇比例的增大而变大,且分布变宽；随着硝酸比例的增大呈现先减小后增大的趋势,在HNO3/TEOS=0.085时达到最小.溶胶粒径平均大小从2.3 nm到91 nm时H2的渗透率从4.4×10-7mol/(m2·s-Pa)上升到8.2×10-7mol/(m2·s·Pa),H2和CO2的通过率都随着胶粒的增大而呈增大的趋势；但是气体的分离系数呈减小的趋势,只有溶胶胶粒平均值小于4.5 nm的溶胶涂膜后,才具有分子筛分效应,其H2/CO2值大于努森扩散的理想分离系数.
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