Pd–Au nanoparticles supported by TiO2 fibers for catalytic NO decomposition by CO

Shin, Hyun Su; Lolla, Dinesh; Nikolov, Zhorro; Chase, George G.

doi:10.1016/j.jiec.2015.09.020

Cited by 64 publications

(30 citation statements)

References 49 publications

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“…Nanofibers can be produced using many different techniques such as self-assembly [7,11], template synthesis [7,12], phase separation [9,13], drawing [14,15] and electrospinning [16][17][18][19][20]. These manufacturing processes have advantages for specific fiber formation; however, they have some disadvantages from a processing standpoint.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Surfactants on the Morphology and Properties of Electrospun Polyetherimide Fibers

Abutaleb

Lolla

Aljuhani³

et al. 2017

Fibers

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Electrospun fibers often have beads as byproducts. Bead formation can be substantially minimized by the introduction of additives, such as ionic salts or surfactants, to the electrospinning polymeric solution. Polyetherimide (PEI) fibers were fabricated using electrospinning. Four different additives, Lithium Chloride (LiCl), Sodium Chloride (NaCl), Triton X-100 and Hexadecyltrimethylammonium Bromide (HTAB) were utilized to alter the polymer solution electrical conductivity and surface tensions. The effects of solution conductivity and surface tension on the electrospinning and the thermal, mechanical stability of the polymeric fibers were investigated. Morphology, thermal properties, permeability and mechanical strength of the fiber mats were investigated using Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), Frazier Permeability Test, and Tensile tester respectively. The addition of 1.5wt.% HTAB was found to be the optimum concentration to produce PEI fibers without beads. The addition of HTAB produced fiber mats with higher air permeability, higher thermal stability and higher mechanical strength in comparison to the other additives. Finally, a filtration test was conducted on a simple custom model to compare the performance of beaded and non-beaded PEI fiber mats. The non-beaded PEI fiber mat performed better in terms of both separation efficiency (%E) and differential pressure drop (∆P) separating water droplets from diesel fuel.

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Section: Introductionmentioning

confidence: 99%

“…The setup is very simple, and the process is fast. Continues fibers can be easily produced and the scale up of this process seems possible [16][17][18][19][20]. The setup applied in this work is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Effects of Surfactants on the Morphology and Properties of Electrospun Polyetherimide Fibers

Abutaleb

Lolla

Aljuhani³

et al. 2017

Fibers

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“…Small micron sized alumina tubes could be used for metering and controlling liquid flows in microfluidic processes [26]. Previous work in our research group has used ceramic fibers as a catalyst support structure [27,28], and hollow fibers have been shown to have a higher surface area when compared to solid fibers [18], which can of benefit to improve performance of supported catalysts. Other applications may include filtration media and membranes on a smaller scale than other alumina tube membranes [29,30] to take advantage of the increased surface area from electrospun fibers.…”

Section: Discussionmentioning

confidence: 99%

Core–Shell Electrospun Hollow Aluminum Oxide Ceramic Fibers

Rajala

Shin

Lolla

et al. 2015

Fibers

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Abstract:In this work, core-shell electrospinning was employed as a simple method for the fabrication of composite coaxial polymer fibers that became hollow ceramic tubes when calcined at high temperature. The shell polymer solution consisted of polyvinyl pyrollidone (PVP) in ethanol mixed with an aluminum acetate solution to act as a ceramic precursor. The core polymer was recycled polystyrene to act as a sacrificial polymer that burned off during calcination. The resulting fibers were analyzed with X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) to confirm the presence of gamma-phase aluminum oxide when heated at temperatures above 700 °C. The fiber diameter decreased from 987 ± 19 nm to 382 ± 152 nm after the calcination process due to the polymer material being burned off. The wall thickness of these fibers is estimated to be 100 nm.

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“…Among the known natural polymers, polysaccharides such as chitosan, alginate, and pectin are produced in large scales and are routinely consumed as gelling and thickening agents within the food industry and other related industries [227][228][229][230]. Particular interest exists for the fabrication of nanofibers due to their abundance, biocompatibility, functional ionic groups, and inherent biological activity [231][232][233][234]. Pectin nanofibers can be used in food and medical products.…”

Section: Page 11 Of 35mentioning

confidence: 99%