Formation Mechanism of Mesoporous Aluminum Hydroxide Film by Alkali Surface Modification

Title
Formation Mechanism of Mesoporous Aluminum Hydroxide Film by Alkali Surface Modification
Authors
서영익전용진이영중김대건이규환김영도
Keywords
akali surface modification; aluminum hydroxide; mesoporous surface; gibbsite
Issue Date
2010-02
Publisher
한국재료학회지; Korean Journal of Materials Research
Citation
VOL 20, NO 2, 97-103
Abstract
In this study, a new, relatively simple fabrication method for forming a mesoporous Al(OH)₃film on Al substrates was demonstrated. This method, i.e., alkali surface modification, was simply comprised of dipping the substrate in a 5 × 10-3 M NaOH solution at 80℃ for one minute and then immersing it in boiling water for 30 minutes. After alkali surface modification, a mesoporous Al(OH)₃film was formed on the Al substrate, and its chemical state and crystal structure were confirmed by XPS and TEM. According to the results of the XPS analysis, the flake-like morphology after the alkali surface modification was mainly composed of Al(OH)₃, with a small amount of Al₂O₃. The mesoporous Al(OH)₃layer was composed of three regions: an amorphousrich region, a region of mixed amorphous and crystal domains, and a crystalline-rich region near the Al(OH)₃ layer surface. It was confirmed that the stabilization process in the alkali surface modification strongly influenced the crystallization of the mesoporous Al(OH)3 layer.
URI
http://pubs.kist.re.kr/handle/201004/38365
ISSN
1225-0562
Appears in Collections:
KIST Publication > Article
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