Fabrication and characterization of flexible ruthenium oxide<b>‐</b>loaded polyaniline/poly(vinyl alcohol) nanofibers

Chamakh, Mariem; Ayesh, Ahmad I.; Gharaibeh, M. F.

doi:10.1002/app.49125

Cited by 8 publications

(5 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was mainly assigned to the increase of the carrier concentration, as well as the growing rate of electron transfer from valence to the conduction band [ 28 ]. At elevated temperatures, sufficient energy was attained by the ions, which empowered them to move and diffuse to the metal electrodes due to their potential differences [ 27 ]. The figure illustrates single semicircles for all measurements, which revealed that a membrane may be presented by a single parallel RC circuit [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

“…This work represents a continuation of our previous investigations of producing PVA nanoparticle composites for device applications ref. [ 11 , 12 , 15 , 17 , 27 , 28 , 29 , 30 ]. The previous investigations revealed that the modification of PVA with nanoparticles and plasticizers permit fine adjustments of the electrical and mechanical properties of its membranes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fabrication and Characterization of Nanocomposite Flexible Membranes of PVA and Fe3O4

Salah

Ayesh

2020

Molecules

Self Cite

View full text Add to dashboard Cite

Composite polymer membranes of poly(vinyl alcohol) (PVA) and iron oxide (Fe3O4) nanoparticles were produced in this work. X-ray diffraction measurements demonstrated the formation of Fe3O4 nanoparticles of cubic structures. The nanoparticles were synthesized by a coprecipitation technique and added to PVA solutions with different concentrations. The solutions were then used to generate flexible membranes by a solution casting method. The size and shape of the nanoparticles were investigated using scanning electron microscopy (SEM). The average size of the nanoparticles was 20±9 nm. Raman spectroscopy and Fourier-transform infrared spectroscopy (FTIR) were utilized to investigate the structure of the membranes, as well as their vibration modes. Thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) demonstrated the thermal stability of the membranes and the crystallinity degree. Electrical characteristics of the thin membranes were examined using impedance spectroscopy as a function of the nanoparticles’ concentrations and temperatures. The resistivity of the fabricated flexible membranes was possible to adjust by controlled doping with suitable concentrations of nanoparticles. The activation energy decreased with the nanoparticles’ concentrations due to the increase in charge carriers’ concentrations. Therefore, the fabricated membranes may be applied for practical applications that involve the recycling of nanoparticles for multiple application cycles.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Nanocomposite Flexible Membranes of PVA and Fe3O4

Salah

Ayesh

2020

Molecules

Self Cite

View full text Add to dashboard Cite

show abstract

“…The figures illustrate that the radii of the semicircles decrease with temperature that refers to their negative temperature coefficient of the resistance for the membranes. 15,46 Nevertheless, the resistance value cannot be utilized to compare the different membranes due to their unequal thicknesses. Hence, the resistivity (ρ) is calculated using the thickness of a membrane (l) and contact area (A): ρ ¼ R A l .…”

Section: Resultsmentioning

confidence: 99%

“…The DC resistance of a membrane can be determined by fitting the dependence, where it is referred to as the radius of the semicircle. The figures illustrate that the radii of the semicircles decrease with temperature that refers to their negative temperature coefficient of the resistance for the membranes 15,46 . Nevertheless, the resistance value cannot be utilized to compare the different membranes due to their unequal thicknesses.…”

Section: Resultsmentioning

confidence: 99%

Investigation of x‐ray response for flexible nanocomposite membranes of metal oxides and poly(vinyl alcohol)

Ayesh

Salah

Nawwas

et al. 2021

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

In this work, flexible composite membranes of nanoparticles (CuO, ZnO, or both), poly(vinyl alcohol) (PVA), and glycerol (GL) plasticizer are fabricated of for X-ray detector applications. The nanoparticles are synthesized by a modified solvothermal technique and introduced to PVA + GL solution to fabricate the membranes. The mean sizes of nanoparticles are 10 Ç 4 nm and 8 Ç 3 nm, for CuO and ZnO in order. The composition of nanoparticles and membranes are investigated by energy dispersive x-ray spectroscopy and x-ray spectroscopy. Increasing nanoparticle concentration within the membranes causes their glass transition temperature to shift to low temperatures and enhances their thermal resistance. Fourier-transform infrared spectroscopy demonstrates the formation of hydrogen bonds between nanoparticles and PVA that are generated by the intermolecular and intramolecular hydrogen bonds. Impedance spectroscopy characterization reveals that the membranes hold negative temperature coefficient of the resistance. The activation energy decreases with increasing nanoparticle concentration. The composite membranes exhibit a decent response to x-ray that is proportional to its energy. The best x-ray response is for the membranes with both CuO and ZnO nanoparticles, because of their different bandgaps that cause a wide range of excitation energy to be involved. The fabricated membranes have numerous advantages such as their semiconductor features, flexibility, and feasibility of fabrication on a large scale with reasonable cost.

show abstract

“…Electrospinning is a versatile technique to fabricate uniform ultrafine fibers with diameters ranging from 20 to 2000 nm directly from polymer solutions or melts. 23,24 These porous nanofiber mats prepared by this technique were ideal supporting matrices for palladium catalysts.…”

Section: Introductionmentioning

confidence: 99%

Palladium complex embedded crosslinked polystyrene nanofibers as a green and efficient heterogeneous catalyst for coupling reactions

Zhang

Qin

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

A simple and green chemical modification coupled with electrospinning technique has been developed to incorporate tetrakis(triphenylphosphine)palladium [Pd(PPh3)4] inside crosslinked polystyrene nanofibers (Pd@CPS) as an efficient and stable heterogeneous palladium catalyst. The catalytic activities and recyclabilities of the prepared Pd@CPS catalyst have been evaluated by using Suzuki and Heck reactions of various aromatic halides separately with phenylboronic acid and alkenes. The Pd@CPS exhibited high‐catalytic activities for the Suzuki and Heck reactions of aromatic iodides to afford the products in excellent yields (coupling yields >88%). The catalytic activities and the nanofiber structure remained essentially unchanged even after recycling for five times. The high activities and stabilities of the prepared Pd@CPS catalyst can be attributed to the ultrafine fiber and embedment of palladium active species inside the nanofibers.

show abstract

Fabrication and characterization of flexible ruthenium oxide‐loaded polyaniline/poly(vinyl alcohol) nanofibers

Cited by 8 publications

References 39 publications

Fabrication and Characterization of Nanocomposite Flexible Membranes of PVA and Fe3O4

Fabrication and Characterization of Nanocomposite Flexible Membranes of PVA and Fe3O4

Investigation of x‐ray response for flexible nanocomposite membranes of metal oxides and poly(vinyl alcohol)

Palladium complex embedded crosslinked polystyrene nanofibers as a green and efficient heterogeneous catalyst for coupling reactions

Contact Info

Product

Resources

About