A new method for preparing α-alumina ultrafiltration membrane at low sintering temperature

Shi, Weida; Yang, Chao; Qiu, Minghui; Chen, Xianfu; Fan, Yiqun

doi:10.1016/j.memsci.2021.119992

Cited by 20 publications

(4 citation statements)

References 55 publications

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“…The properties of the membrane depend on the use of appropriate methods and material modifications to obtain the appropriate structure and morphology for the separation process [39]. Various methods are used to produce membranes such as molding [84,85], solution casting [86,87], sintering [88,89], stretching [90], coating [91,92] and phase inversion [40,[93][94][95]. The solution casting techniques, phase inversion techniques, and electrospinning are the most frequently used techniques for membrane production.…”

Section: Membrane Fabrication Techniquesmentioning

confidence: 99%

Natural Fiber-Reinforced Thermoplastic ENR/PVC Composites as Potential Membrane Technology in Industrial Wastewater Treatment: A Review

et al. 2022

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Membrane separation processes are prevalent in industrial wastewater treatment because they are more effective than conventional methods at addressing global water issues. Consequently, the ideal membranes with high mechanical strength, thermal characteristics, flux, permeability, porosity, and solute removal capacity must be prepared to aid in the separation process for wastewater treatment. Rubber-based membranes have shown the potential for high mechanical properties in water separation processes to date. In addition, the excellent sustainable practice of natural fibers has attracted great attention from industrial players and researchers for the exploitation of polymer composite membranes to improve the balance between the environment and social and economic concerns. The incorporation of natural fiber in thermoplastic elastomer (TPE) as filler and pore former agent enhances the mechanical properties, and high separation efficiency characteristics of membrane composites are discussed. Furthermore, recent advancements in the fabrication technique of porous membranes affected the membrane’s structure, and the performance of wastewater treatment applications is reviewed.

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Section: Membrane Fabrication Techniquesmentioning

confidence: 99%

Natural Fiber-Reinforced Thermoplastic ENR/PVC Composites as Potential Membrane Technology in Industrial Wastewater Treatment: A Review

et al. 2022

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“…These challenges curtail the broader application of α-Al 2 O 3 . 12,13 To overcome the drawbacks of high-temperature calcination, many researchers have endeavored to synthesize α-Al 2 O 3 at lower temperatures. Preparing α-Al 2 O 3 at lower temperatures not only allows the reduction of particle size and increase of specific surface area of α-Al 2 O 3 but also lowers the energy consumption required for its synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Such elevated calcination temperature results in abnormal grain growth and significant powder aggregation, leading to an undesirable increase in α‐Al 2 O 3 particle size and a pronounced loss of specific surface area. These challenges curtail the broader application of α‐Al 2 O 3 12,13 . To overcome the drawbacks of high‐temperature calcination, many researchers have endeavored to synthesize α‐Al 2 O 3 at lower temperatures.…”

Section: Introductionmentioning

confidence: 99%

Lowering the synthesis temperature of α‐Al₂O₃ by increasing the content of pentacoordinate aluminum in the precursors

Wei,

Ma,

et al. 2024

Int J Applied Ceramic Tech

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Abstractα‐Al2O3, commonly known as corundum, plays a significant role in various industrial applications. Typically, the synthesis of α‐Al2O3 requires elevated temperatures exceeding 1200°C, which results in reduced specific surface area and increased particle size due to high‐temperature calcination. In this study, α‐Al2O3 powder was primarily investigated. The precursor was prepared by non‐hydrolytic sol‐gel (NHSG) method, employing alcohols and other nonaqueous oxygen donors in nucleophilic substitution reactions with AlCl3. The precursor was then processed by mechanochemical method, leading to the attainment of α‐Al2O3 at temperatures below 800°C. The resultant α‐Al2O3 was in the form of thin flakes, with significantly increased specific surface areas up to 27.9 m2/g. Upon characterizing the precursors post‐ball milling, a large amount of pentacoordinate aluminum was observed. The pentacoordinate aluminum has activated the alumina lattice and increased the phase transition rate, a key factor in the low temperature preparation of α‐Al2O3. This innovative approach not only simplifies the preparation process but also enables the production of high‐purity, large specific surface area lamellar α‐Al2O3 at lower temperatures, paving the way for more efficient and cost‐effective industrial processes.

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“…Due to their superior physical, thermal, and chemical durability to organic solvents and acid-base corrosion, inorganic NF membranes are considered an advanced substitute for polymeric membranes [ 13 ]. α-Al 2 O 3 has attracted a lot of interest in the context of the NF process as support for various other oxides [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. In this area of interest, the top layers of α-Al 2 O 3 supports for separation applications are frequently composed of γ-Al 2 O 3 [ 17 , 18 , 19 ], TiO 2 [ 20 , 21 , 22 ], GO [ 23 , 24 ], and so on [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Novel TiO2/GO-Al2O3 Hollow Fiber Nanofiltration Membrane for Desalination and Lignin Recovery

et al. 2022

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Due to its greater physical–chemical stability, ceramic nanofiltration (NF) membranes were used in a number of industrial applications. In this study, a novel NF membrane was prepared by co-depositing a titanium dioxide (TiO2) and graphene oxide (GO) composite layer directly onto a porous α-Al2O3 hollow fiber (HF) support. An 8 µm-thick TiO2/GO layer was deposited to the surface of α-Al2O3 HF support by vacuum deposition method to produce advanced TiO2/GO-Al2O3 HF NF membrane. Scanning electron microscope (SEM) micrographs, energy dispersive spectrometer (EDS), X-ray powder diffraction (XRD), thermogravimetric analyzer (TGA), porosity, 3-point bending strength, zeta potential analysis, and hydrophilic properties by water contact angle are used for TiO2/GO-Al2O3 HF NF membrane characterization. The results show that the developed membrane’s MWCO ranged from 600 to 800 Da. The water flux, rejection of lignin, and sodium ions were 5.6 L/m2 h·bar, ~92.1%, and ~5.5%, respectively. In a five-day NF process, the TiO2/GO-Al2O3 HF NF membrane exhibits good lignin permeation stability of about 14.5 L/m2 h.

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A new method for preparing α-alumina ultrafiltration membrane at low sintering temperature

Cited by 20 publications

References 55 publications

Natural Fiber-Reinforced Thermoplastic ENR/PVC Composites as Potential Membrane Technology in Industrial Wastewater Treatment: A Review

Natural Fiber-Reinforced Thermoplastic ENR/PVC Composites as Potential Membrane Technology in Industrial Wastewater Treatment: A Review

Lowering the synthesis temperature of α‐Al₂O₃ by increasing the content of pentacoordinate aluminum in the precursors

Novel TiO2/GO-Al2O3 Hollow Fiber Nanofiltration Membrane for Desalination and Lignin Recovery

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A new method for preparing α-alumina ultrafiltration membrane at low sintering temperature

Cited by 20 publications

References 55 publications

Natural Fiber-Reinforced Thermoplastic ENR/PVC Composites as Potential Membrane Technology in Industrial Wastewater Treatment: A Review

Natural Fiber-Reinforced Thermoplastic ENR/PVC Composites as Potential Membrane Technology in Industrial Wastewater Treatment: A Review

Lowering the synthesis temperature of α‐Al2O3 by increasing the content of pentacoordinate aluminum in the precursors

Novel TiO2/GO-Al2O3 Hollow Fiber Nanofiltration Membrane for Desalination and Lignin Recovery

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Product

Resources

About

Lowering the synthesis temperature of α‐Al₂O₃ by increasing the content of pentacoordinate aluminum in the precursors