SURFACE CHEMICAL STUDIES OF ANODICALLY OXIDIZED ALUMINUM MEMBRANES

被引:2
|
作者
TREVERTON, JA [1 ]
WEST, R [1 ]
JOHNSON, D [1 ]
THORNTON, M [1 ]
机构
[1] CSMA LTD,MANCHESTER M1 7ED,ENGLAND
关键词
D O I
10.1016/0169-4332(93)90373-J
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
X-ray photoelectron spectroscopy (XPS) and fast atom bombardment secondary ion mass spectrometry (FAB-SIMS) have been used to study the surfaces of inorganic microfiltration membranes produced by controlled removal of anodic films formed on aluminium in phosphoric and oxalic acid electrolytes. The results are compared with those of similar analyses of membranes produced from anodic films formed in mixed oxalic/phosphoric acid electrolyte. Both techniques established that phosphates were concentrated on the surface of membranes formed in phosphoric acid and oxalic/phosphoric acid and that oxalate ions were present on the surfaces of membranes formed in oxalic acid. The low intensity of the AlO(x)- fragments implies that all of the aluminium ions in the surface are coordinated to phosphates or oxalates. However, any differences its the chemical state of the aluminium on the different membranes were not detectable by either technique.
引用
收藏
页码:349 / 361
页数:13
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