Electrospinning of Metal Doped Alumina Nanofibers for Catalyst Applications

Swaminathan, Sneha

doi:10.5772/24966

Cited by 4 publications

(4 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calcination conditions depend on the temperature needed to oxidize the carbon and hydrogen atoms of the polymer to ensure the complete degradation of polymeric fiber. Ceramic alumina fibers with catalysts fabricated in this way have been successfully used to catalytically react NO and CO gases from engine exhausts with high efficiency [23][24].…”

Section: Introductionmentioning

confidence: 99%

Effects of Electrospinning Solution Properties on Formation of Beads in Tio2 Fibers with PdO Particles

Shahreen

2015

Journal of Engineered Fibers and Fabrics

View full text Add to dashboard Cite

TiO 2 fibers with catalytic PdO particles are of interest for use as porous catalytic converters to react NO x and CO to control air pollution. The fibers are first electrospun as template polymer fibers. The template polymer fibers are calcined to form the ceramic fibers. The electrospinning solution composition significantly affects the average fiber diameter and fiber morphologies (beads) which in turn affect the catalyst performance. In this work, solutions containing Polyvinylpyrrolidone (PVP), Titanium (IV) Isopropoxide (TTIP), and Palladium (II) Chloride (PdCl 2) were electrospun with the goal of fabricating beadless submicron composite fibers. The fibers were calcined to produce ceramic TiO 2 submicron fibers with Palladium oxide (PdO) nanoparticles. To determine the solution recipes that form smooth PdO-TiO 2 fibers without beads, fibers were electrospun and evaluated from solutions with varied mass concentrations of PVP and PdCl 2 salt. The solution concentrations indirectly influenced the electrospinning performance through solution viscosity, surface tension and electrical conductivity. The ceramic fibers were produced with average diameters in the range of 180-280 nm and with minimal formation of beads when the solution had viscosity in the range of 52 to 80 cP and conductivity in the range of 45-67 µs/cm. It was found that the surface tension of the solutions did not vary significantly and did not strongly affect the formation of beads.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of Electrospinning Solution Properties on Formation of Beads in Tio2 Fibers with PdO Particles

Shahreen

2015

Journal of Engineered Fibers and Fabrics

View full text Add to dashboard Cite

show abstract

“…The third weight-loss of 40.99 wt% in the range of 300-500 C is assigned to the complete decomposition of PVP 33 and the release of the water formed in the condensation of silanols in the silica gels 34 and the conversion of the metal precursor (PdCl 2 ) into metal oxide (PdO). 35 Hence, the bers obtained above 600 C have been converted into silica-ber-supported metal oxide (PdO).…”

Section: Resultsmentioning

confidence: 99%

Electrospinning of palladium/silica nanofibers for catalyst applications

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Alumina has different crystalline phases, depending on the fabrication temperature [39]. The different phases are known to affect the performance of impregnated catalysts in monolithic structures [40,41].…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcination Temperature on NO–CO Decomposition by Pd Catalyst Nanoparticles Supported on Alumina Nanofibers

Shin

Abutaleb

Lolla

2017

Fibers

Self Cite

View full text Add to dashboard Cite

Abstract:In this work, palladium (Pd) nanoparticles were blended into a solution of a sacrificial polymer and an aluminum sol gel precursor to form alumina fibers containing the palladium particles. The polymer solution was electrospun into template submicron fibers. These fibers were calcined at temperatures between 650 • C and 1150 • C to remove the polymer and oxidize the aluminum. The internal crystalline morphologies of the calcined fibers transformed with change in the calcination temperature. The calcined fibers were formed into fibrous mats and further tested for their catalytic performances. The Pd particles had a size ranging from 5-20 nm and appeared randomly distributed within and near the surfaces of the alumina fibers. The final metal loading of all Pd/Al 2 O 3 samples ranged from 4.7 wt % to 5.1 wt %. As calcination temperature increased the alumina crystal structure changed from amorphous at 650 • C to alpha crystal structure at 1150 • C. With the increase of calcination temperature, the average fiber diameters and specific surface areas decreased. The catalyst supported fiber media had good conversion of NO and CO gases. Higher calcination temperatures led to higher reaction temperatures from 250 to about 450 • C for total conversion, indicating the effective reactivity of the fiber-supported catalysts decreased with increase in calcination temperature. The fibers formed at the 650 • C calcination temperature had the highest reaction activity.

show abstract

Electrospinning of Metal Doped Alumina Nanofibers for Catalyst Applications

Cited by 4 publications

References 43 publications

Effects of Electrospinning Solution Properties on Formation of Beads in Tio2 Fibers with PdO Particles

Effects of Electrospinning Solution Properties on Formation of Beads in Tio2 Fibers with PdO Particles

Electrospinning of palladium/silica nanofibers for catalyst applications

Effect of Calcination Temperature on NO–CO Decomposition by Pd Catalyst Nanoparticles Supported on Alumina Nanofibers

Contact Info

Product

Resources

About