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Influence of water molar ratio on fabrication of silica ceramic membranes via sol-gel dip-coating method

Kahlib, Nor Amyra Zulianey and Wan Mazlan, Wan Amirah and Mohd Daud, Farah Diana and Mel, Maizirwan and Ahmad Azhar, Ahmad Zahirani and Hassan, Noor Azlina and Nor Hairin, Assayidatul Laila (2018) Influence of water molar ratio on fabrication of silica ceramic membranes via sol-gel dip-coating method. International Journal of Current Science, Engineering & Technology, 1 (Special Issue 1). pp. 378-383. ISSN 2581-4311

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Ceramic membranes are an inorganic membrane that received great attention as it overcome the limitation of polymeric membrane. The silica ceramic membrane can be used in gas separation as it able to work at elevated temperature and in chemically aggressive environment. This work is conducted to study the influence of the molar ratio of water (R) on the fabrication of silica ceramic membrane by sol-gel dip-coating method. Commercial support was dipped into the solutions consist of the mixture of tetraethylorthosilicate (TEOS), distilled water and ethanol with the addition of a small amount of acid as a catalyst. The molar ratio of TEOS toethanol was fixed at 1 to 3.8 (TEOS:ethanol, 1:3.8). However, the molar ratio of water are varied at 2, 3, 4 and 4.7. FESEM (Field Emission Scanning Electron Microscope), XRD (X-ray Diffraction) and FTIR (Fourier Transform Infrared Spectroscopy) are utilized to determine the structural and chemical properties of silica ceramics that are fabricated with different R. FESEM images implied that the silica has been deposited on the surface of silica membrane and penetrate into the pore walls. XRD analysis of the fabricated silica ceramic membranes illustrated the existence of silicate hydrate. The fabricated silica ceramic membrane with silica sol molar ratio 1:3:3.8 gave the lowest intensity of XRD peak. FTIR analysis, it was observed that the presence of Si-O-Si functional group is in the range 1060 to 1080 cm-1.

Item Type: Article (Journal)
Additional Information: 7338/65148
Uncontrolled Keywords: Water molar ratio, Silica sol, Silica ceramic, Sol-gel, Dip-coating;
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Biotechnology Engineering
Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Dr Ahmad Zahirani Ahmad Azhar
Date Deposited: 20 Aug 2018 11:17
Last Modified: 20 Aug 2018 11:17
URI: http://irep.iium.edu.my/id/eprint/65148

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