Formation Mechanism of Mesoporous Aluminum Hydroxide Film by Alkali Surface Modification
- Formation Mechanism of Mesoporous Aluminum Hydroxide Film by Alkali Surface Modification
- 서영익; 전용진; 이영중; 김대건; 이규환; 김영도
- akali surface modification; aluminum hydroxide; mesoporous surface; gibbsite
- Issue Date
- 한국재료학회지; Korean Journal of Materials Research
- VOL 20, NO 2, 97-103
- 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.
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