Fine control of NaCl crystal size and particle size in percrystallisation by tuning the morphology of carbonised sucrose membranes

Madsen, Rasmus S.K.; Motuzas, Julius; Vaughan, James; Julbe, A.; Costa, João C. Diniz da

doi:10.1016/j.memsci.2018.09.003

Cited by 19 publications

(6 citation statements)

References 32 publications

(39 reference statements)

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“…Porous substrates play a major role in devices requiring the flow of fluids such as in filters and membranes. Porous substrates are also extensively used for the preparation of inorganic membranes for microfiltration, desalination, gas separation, and percrystallization processes . These inorganic membranes are known as asymmetric membranes as they are conventionally prepared by coating ceramic or carbon thin films as top layers on porous substrates.…”

Section: Introductionmentioning

confidence: 99%

Manufacture of Highly Porous Tubular Alumina Substrates with Anisotropic Pore Structure by Freeze‐Casting

et al. 2020

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Porous substrates play a major role in devices requiring the flow of fluids such as in filters and membranes. Porous substrates are also extensively used for the preparation of inorganic membranes for microfiltration, [1][2][3] desalination, [4][5][6][7] gas separation, [8][9][10][11] and percrystallization processes. [12,13] These inorganic membranes are known as asymmetric membranes as they are conventionally prepared by coating ceramic [14][15][16] or carbon [17][18][19] thin films as top layers on porous substrates. The importance of the porous substrate is to provide the mechanical strength otherwise not available in thin films. Many inorganic materials such as ceramics [20][21][22] and stainless steel [23][24][25] have been manufactured as porous substrates, though alumina is the most used material due to lower costs and processing versatility. Porous substrates come in several geometries such as tubes, [14,[26][27][28] hollow fibers, [29][30][31] and flat surfaces. [19,32] Traditionally, inorganic porous substrates are prepared from conventional ceramic processes such as slip-casting, [33,34] extrusion, [35,36] dry pressing, [37] tapecasting, [38][39][40] and phase inversion hollow fibers. [41,42] A relatively more recent method is the freeze-casting technique for processing porous ceramic substrates. [43][44][45][46] Due to the ability of forming an aligned pore structure, this technique can overcome problems associated with lower fluid fluxes conferred by conventional ceramic processing methods such as tortuous pore structure, constrictions, and dead-end and isolated pores. [47] Freeze-cast starts with the preparation of a stable ceramic suspension (or slurry) at normal conditions followed by controlled freezing of the solvent of the ceramic

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Section: Introductionmentioning

confidence: 99%

Manufacture of Highly Porous Tubular Alumina Substrates with Anisotropic Pore Structure by Freeze‐Casting

et al. 2020

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“…Before deposition of the SiC membrane on the α-Al 2 O 3 supports (tubes and discs), a carbon buffer layer was first deposited by following a protocol adapted from Madsen et al [ 33 ], based on the pyrolysis of glucose. The objective was to avoid the formation of an oxide material at the interface between the SiC layer and the α-Al 2 O 3 support.…”

Section: Methodsmentioning

confidence: 99%

Mesoporous SiC-Based Photocatalytic Membranes and Coatings for Water Treatment

et al. 2023

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Photocatalytically active silicon carbide (SiC)-based mesoporous layers (pore sizes between 5 and 30 nm) were synthesized from preceramic polymers (polymer-derived ceramic route) on the surface and inside the pores of conventional macroporous α-alumina supports. The hybrid membrane system obtained, coupling the separation and photocatalytical properties of SiC thin films, was characterized by different static and dynamic techniques, including gas and liquid permeation measurements. The photocatalytic activity was evaluated by considering the degradation efficiency of a model organic pollutant (methylene blue, MB) under UV light irradiation in both diffusion and permeation modes using SiC-coated macroporous supports. Specific degradation rates of 1.58 × 10−8 mol s−1 m−2 and 7.5 × 10−9 mol s−1 m−2 were obtained in diffusion and permeation modes, respectively. The performance of the new SiC/α-Al2O3 materials compares favorably to conventional TiO2-based photocatalytic membranes, taking advantage of the attractive physicochemical properties of SiC. The developed synthesis strategy yielded original photocatalytic SiC/α-Al2O3 composites with the possibility to couple the ultrafiltration SiC membrane top-layer with the SiC-functionalized (photocatalytic) macroporous support. Such SiC-based materials and their rational associations on porous supports offer promising potential for the development of efficient photocatalytic membrane reactors and contactors for the continuous treatment of polluted waters.

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“…Its high negative surface charge density might dramatically hinders ionic transport [47] and amino-functionalized BNlayered membranes revealed to be efficient for solute screening in both water and organic solvents [48]. The hydrophobicity and moderate surface energy of macroporous and mesoporous carbon membranes is well adapted to membrane distillation [49] and crystallization processes, including the continuous percrystallisation approach [50]. The unique surface properties of graphene, GO and other 2D materials generate high-performance versatile membranes for liquid phase applications [51].…”

Section: New Inorganic and Hydrid Membrane Materials For Liquid Phasementioning

confidence: 99%

About the role of adsorption in inorganic and composite membranes

Julbe¹,

Drobek²,

Ayral³

2019

Current Opinion in Chemical Engineering

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Adsorption phenomena and surface-derived reactions on interfaces are fundamentally important processes in environmental chemistry, energy, catalysis or materials processing, and play a crucial role in the control of membrane performance. Adsorption of species at the surface of membrane materials has been a vast topic of investigation for decades, with both fundamental impact and direct spin-off in industry. In this minireview, the pivotal role of adsorption for both gas-and liquid-phase membrane separations is underlined with a focus on inorganic and composite membrane materials, their design strategies, transport mechanisms and associated performance. A particular attention is dedicated to fouling phenomena and emerging surface treatment methods. Finally the role of adsorption for membrane microstructure characterisation and defect detection is discussed.

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Fine control of NaCl crystal size and particle size in percrystallisation by tuning the morphology of carbonised sucrose membranes

Cited by 19 publications

References 32 publications

Manufacture of Highly Porous Tubular Alumina Substrates with Anisotropic Pore Structure by Freeze‐Casting

Manufacture of Highly Porous Tubular Alumina Substrates with Anisotropic Pore Structure by Freeze‐Casting

Mesoporous SiC-Based Photocatalytic Membranes and Coatings for Water Treatment

About the role of adsorption in inorganic and composite membranes

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