摘要
通过在化学镀镀液中添加长链巯基有机物(2-巯基苯并噻唑),利用巯基与金属钯强烈吸附的性质,使其吸附在钯膜表面,这样钯的自催化沉积仅仅发生在缺陷内部而不发生在钯膜表面,从而对含有缺陷的钯膜进行修补.对于选择性分别为720和4的M1和M2两根复合钯膜管,经过多次修补后,选择性S分别提高到2 556和3 990.经过SEM(EDS)和XRD的分析,修补过后的钯膜表面未见硫化物、碳化物等杂质的存在和表面缺陷的存在.结果表明这种自下而上修补法是可行的.
The Pd composite membranes containing defects were repaired by electroless plating with addition of 2- mercaptobenzothiazole （MBT）. MBT could inhibit the electroless Pd plating on the Pd membrane surface, not in the small defect hole. The ideal H2/N2 selectivity of M1, S, increased from 720 to 2 556 and that of M2 increased from 4 to 3 990 after repairing by this method. The surface of M2 was characterized by SEM （EDS） and XRD. There was no sulfide, carbide and defect on the surface after repairing.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2009年第3期48-51,共4页
Membrane Science and Technology
关键词
复合钯膜
自催化沉积
氢气分离
自下而上修补法
Pd composite membrane
electroless plating
hydrogen separation
bottom up fill
