Fabrication of silica ceramic membrane via sol-gel dip-coating method at different nitric acid amount

Kahlib, Nor Amyra Zulianey; Daud, Farah Diana Mohd; Mel, Maizirwan; Hairin, Assayidatul Laila Nor; Azhar, Ahmad Zahirani Ahmad; Hassan, Noor Azlina

doi:10.1088/1757-899x/290/1/012042

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…Table 4 highlights some basic differences between polymeric and ceramic membranes. Symmetric or isotropic ceramic membranes are typically fabricated through either extrusion [233], slip casting [234] or pressing [235], while asymmetric membranes can be prepared by coating symmetric ceramic membranes using dip-coating [236], sol-gel [237] and chemical and electrochemical vapor deposition techniques [238]. Isotropic membranes comprise a homogeneous composition usually consisting of a single material while asymmetric membranes usually consist of a macro-or/and mesoporous support layer with a thin active layer of about 1µm or less on the upper surface.…”

Section: Ceramic Membranesmentioning

confidence: 99%

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

2019

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Recent progress in reverse osmosis (RO) technology is not limited to RO membrane materials, module designs and RO process optimization. It involves prior feed treatment which directly impacts RO system performance. The ongoing challenges of membrane fouling in RO membranes can be addressed by increasing the operational efficiency through the use of correct pretreatment options which can mitigate organic and inorganic fouling by selectively rejecting contaminants prior to reaching the RO unit. Highly polluted water resources have put critical stress on the existing conventional pretreatment techniques, whereby membrane pretreatment has emerged as a promising alternative. This paper provides an overview of the development and current trends in conventional and nonconventional RO pretreatment techniques whereby the techniques are critically reviewed to 2 inform readers of potential improvements in such areas. This paper addresses the major drawbacks of conventional pretreatment methods which have necessitated the use of membrane pretreatment techniques. Special attention is given to microfiltration, ultrafiltration and nanofiltration methods and their development in terms of advanced membrane materials based on ceramics and self-cleaning membranes. Studies from laboratory scale standalone systems, pilot scale and large scale integrated systems for performance, cost and ecological analysis have been reviewed to familiarize readers with the many factors which need to be analyzed for selection of the appropriate pretreatment method(s). The critical review in this paper will help researchers focus more on the areas which have room for further development for cost-effective and advanced RO pretreatment techniques.

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Section: Ceramic Membranesmentioning

confidence: 99%

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

2019

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“…Silicon-based membranes, such as those with chemical structures ranging from amorphous silica to pure SiC, have been shown to possess excellent hydrogen separation properties and do not have issues with hydrogen embrittlement and sulfur poisoning. ,, Current methods for producing these ceramic membrane films include solution-based techniques such as spin-coating and dip-coating. − However, films fabricated with these solution-based methods have disadvantages such as substrate compatibility issues and difficulties with disposal of solvents . Silicon-based membranes have also been produced using chemical vapor deposition (CVD) ,, and plasma-enhanced chemical vapor deposition (PECVD) , techniques.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Hydrogen-Selective Silica Membranes via Pyrolysis of Vapor Deposited Polymer Films

Nguyen

Dabir

Tsotsis

et al. 2019

Ind. Eng. Chem. Res.

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Efficient separation of hydrogen under steam reforming conditions is important for the development of clean energy sources. Although high-temperature and steam-stable membranes with high fluxes and large separation factors would be valuable for such an application, their fabrication remains a challenge. Silicon-based ceramic membranes are particularly promising due to their high temperature resistance and excellent chemical stability. In this study, we propose a new synthetic route for fabricating nanoporous, asymmetric membranes via the pyrolysis of silicon-containing polymer films deposited by initiated chemical vapor deposition (iCVD) on macroporous silicon carbide supports. Specifically, we systematically investigated the change in the chemical structure of poly(2,4,6,8-tetravinyl-2,4,6,8-tetramethyl cyclotetrasiloxane) films at different pyrolysis temperatures and found that the complete transition to a silica membrane occurred at ∼1100 °C. Three different supports composed of silicon carbide powders of varying sizes were tested for membrane preparation. It was found that membranes formed with our process were microporous with separation factors several times above the corresponding Knudsen factors. Our synthetic route, therefore, offers a scalable and solventless method for producing silicon-based ceramic membranes for high-temperature separation and sensor applications.

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A review of the current development of photocatalytic membrane research

Alsalhy,

Abdullah,

Alzubaydi

2024

Advanced Ceramics for Photocatalytic Membranes

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Fabrication of silica ceramic membrane via sol-gel dip-coating method at different nitric acid amount

Cited by 5 publications

References 11 publications

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

Fabrication of Hydrogen-Selective Silica Membranes via Pyrolysis of Vapor Deposited Polymer Films

A review of the current development of photocatalytic membrane research

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