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Formation mechanism of mesoporous aluminum hydroxide film by alkali surface modificationopen access

Authors
Seo, Young IkJeon, Yong JinLee, Young JungKim, Dae-GunLLee, Kyu HwanKim, Young Do
Issue Date
Feb-2010
Publisher
한국재료학회
Keywords
Akali surface modification; Aluminum hydroxide; Gibbsite; Mesoporous surface
Citation
Korean Journal of Materials Research, v.20, no.2, pp.97 - 103
Indexed
SCOPUS
KCI
Journal Title
Korean Journal of Materials Research
Volume
20
Number
2
Start Page
97
End Page
103
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/175465
DOI
10.3740/MRSK.2010.20.2.97
ISSN
1225-0562
Abstract
In this study, a new, relatively simple fabrication method for forming a mesoporous Al(OH)3 film 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°C for one minute and then immersing it in boiling water for 30 minutes. After alkali surface modification, a mesoporous Al(OH)3 film 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)3 layer was composed of three regions: an amorphous-rich 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.
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