摘要
分析了多孔阳极氧化铝(PAA)形成过程中,传统"酸性场致溶解"的电化学反应及其局限性。同时,为验证氧气析出反应对PAA孔道产生和发展的影响,深入探讨PAA的形成机理,分别对比了在真空、高气压条件下,铝在三种电解液中的阳极氧化过程。用扫描电子显微镜表征了各种条件下PAA的微观结构,结果表明PAA孔道形成的本质原因是氧气析出反应,而非酸性场致溶解反应。
We addressed the possible mechanisms in porous anodic alumina（PAA） formation by electrochemical reaction.Some discrepancies of the conventional,＂acidic field-assisted dissolution＂ mechanism,responsible for PAA formation,were experimentally analyzed.The anodization of aluminum under different conditions,such as three different electrolytes,in low vacuum,in air and at a high pressure,was performed.The microstructures of the PAA membranes prepared under different conditions were characterized with scanning electron microscopy.The preliminary results show that the impact of the oxygen evolution reaction is clearly much more important than that of the acidic field-assisted dissolution on PAA formation by electrochemical reaction.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2011年第1期119-123,共5页
Chinese Journal of Vacuum Science and Technology
基金
国家自然科学基金资助项目(50373019)
江苏省自然科学基金资助项目(BK2008406)
南京理工大学科研发展基金项目(NO.XKF05018)
关键词
多孔阳极氧化铝
酸性场致溶解
真空
氧气析出
Porous anodic alumina
Acidic field-assisted dissolution
Vacuum
Oxygen evolution
