Effect of nickel deposition on hydrogen permeation behavior of mesoporous γ-alumina composite membranes

Yu, Chang; Sea, Bongkuk; Lee, Dong Hoon; Park, Sang Jun; Lee, Kwan Young; Lee, Kew Ho

doi:10.1016/j.jcis.2007.11.056

Cited by 17 publications

(7 citation statements)

References 23 publications

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“…The ability of yeast water extract to reduce silver ions in the reacting solution and formed the silver nanoparticles was monitored with UV–visible spectra, where specific surface plasmon resonance (SPR) should appear during nanoparticles formation 29 . SPR is the absorption of the visible electromagnetic radiation of the collective oscillations of surface electrons 30 . Indeed, the maximum absorption peak was observed at 420 nm, for both of the samples (Fig.…”

Section: Resultsmentioning

confidence: 99%

Noncytotoxic silver nanoparticles as a new antimicrobial strategy

Skóra

Krajewska

Nowak

et al. 2021

Sci Rep

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Drug-resistance of bacteria is an ongoing problem in hospital treatment. The main mechanism of bacterial virulency in human infections is based on their adhesion ability and biofilm formation. Many approaches have been invented to overcome this problem, i.e. treatment with antibacterial biomolecules, which have some limitations e.g. enzymatic degradation and short shelf stability. Silver nanoparticles (AgNPs) may be alternative to these strategies due to their unique and high antibacterial properties. Herein, we report on yeast Saccharomyces cerevisiae extracellular-based synthesis of AgNPs. Transmission electron microscopy (TEM) revealed the morphology and structure of the metallic nanoparticles, which showed a uniform distribution and good colloid stability, measured by hydrodynamic light scattering (DLS). The energy dispersive X-ray spectroscopy (EDS) of NPs confirms the presence of silver and showed that sulfur-rich compounds act as a capping agent being adsorbed on the surface of AgNPs. Antimicrobial tests showed that AgNPs inhibit the bacteria growth, while have no impact on fungi growth. Moreover, tested NPs was characterized by high inhibitory potential of bacteria biofilm formation but also eradication of established biofilms. The cytotoxic effect of the NPs on four mammalian normal and cancer cell lines was tested through the metabolic activity, cell viability and wound-healing assays. Last, but not least, ability to deep penetration of the silver colloid to the root canal was imaged by scanning electron microscopy (SEM) to show its potential as the material for root-end filling.

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Section: Resultsmentioning

confidence: 99%

Noncytotoxic silver nanoparticles as a new antimicrobial strategy

Skóra

Krajewska

Nowak

et al. 2021

Sci Rep

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“…The number of comprehensive studies describing the design/characterization/stabilization of mesoporous cAl 2 O 3 membrane pore structures as well as their gas transport properties has increased significantly with the synthesis of stable boehmite sols over the past three decades [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The pore structure characteristics, molecular properties of gaseous species and their interactions with the pore walls are some of the important factors for gaseous transport through porous membranes.…”

Section: Introductionmentioning

confidence: 99%

“…It was also reported that CO 2 transport was enhanced by surface diffusion due to the strong interaction with the c-Al 2 O 3 surface. The H 2 selectivity has been improved by the modification of internal pore walls with Pd [24] and Ni [17] in order to increase the contribution of surface diffusion at higher temperatures.…”

Section: Introductionmentioning

confidence: 99%

Sol–gel derived mesoporous and microporous alumina membranes

Topuz

Çiftçioğlu

2010

J Sol-Gel Sci Technol

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Stable polymeric and colloidal boehmite sols were prepared by sol-gel process through controlled hydrolysis/condensation reactions. The particle sizes of the colloidal sols were in the 12-25 nm range depending on the process parameters and about 2 nm for polymeric sols. The presence of a significant increase in the microporosity content of the heat treated polymeric membranes relative to the mesoporous colloidal membranes might make the design of thermally stable microporous alumina membranes with controlled pore structures possible. The phase structure evolution in the 600-800°C range had shown that the crystallization of the gamma alumina in the amorphous matrix starts at about 800°C. This indicated that the pore structure stability may be enhanced through processing up to this relatively high temperature in polymeric alumina derived unsupported membranes. The permeance values of the two and three layered colloidal alumina membranes were observed to be independent of pressure which implies that the dominant gas transport mechanism is Knudsen diffusion in these structures. This was also supported by the 2.8 nm BJH pore sizes of the colloidal membranes. The Knudsen diffusion equation derived permeances of the polymeric alumina membranes with thicknesses of about 300 nm were determined to be very close to the experimentally determined permeance values.

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“…47 Ceramic substrates are also being used to support thin Ni films. However, Ni adheres poorly to ceramic supports, thus proper cleaning 57,58 and treatment 59 63,64 In one of their studies, a dry-wet phase-inversion approach was used to create compact Ni hollow fiber membranes. 64 The Ni hollow fiber membrane is used to separate pure H 2 from reformate mixes.…”

Section: Nickel-based Membranesmentioning

confidence: 99%

“… 47 Ceramic substrates are also being used to support thin Ni films. However, Ni adheres poorly to ceramic supports, thus proper cleaning 57 , 58 and treatment 59 are required before deposition. Al 2 O 3 makes a suitable composite of Ni for H 2 separation.…”

Section: Composite Membranes For H 2 Production Vi...mentioning

confidence: 99%

A Review of the Recent Advances in Composite Membranes for Hydrogen Generation Technologies

Altaf,

Colak,

Karagoz

et al. 2024

ACS Omega

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Keeping global warming at 2 degrees and below as stated in the "Paris Climate Agreement" and minimizing emissions can only be achieved by establishing a hydrogen (H 2 ) ecosystem. Therefore, H 2 technologies stand out in terms of accomplishing zero net emissions. Although H 2 is the most abundant element in the known universe, molecular H 2 is very rare in nature and must be produced. In H 2 production, reforming natural gas and renewable hydrogen processes using electrolyzers comes to the fore. The key to all these technologies is to enhance production speed, performance, and system lifetime. At this point, composite membranes used in both processes come to the fore. This review article summarizes composite membrane technologies used in methane, ethanol, and biomass steam reforming processes, proton exchange membranes, alkaline water electrolysis, and hybrid sulfur cycle. In addition to these common H 2 production technologies at large quantities, the innovative systems developed with solar energy integration for H 2 generation were linked to composite membrane utilization. This study aimed to draw attention to the importance of composite membranes in H 2 production. It aims to prepare a guiding summary for those working on membranes by combining the latest and cutting-edge studies on this subject.

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Effect of nickel deposition on hydrogen permeation behavior of mesoporous γ-alumina composite membranes

Cited by 17 publications

References 23 publications

Noncytotoxic silver nanoparticles as a new antimicrobial strategy

Noncytotoxic silver nanoparticles as a new antimicrobial strategy

Sol–gel derived mesoporous and microporous alumina membranes

A Review of the Recent Advances in Composite Membranes for Hydrogen Generation Technologies

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