Oxygen sensing and transport properties of nanofibers of silica, bismuth doped silica and bismuth silicate prepared via electrospinning

Hussain, M.; Batool, S. S.; Imran, Zahid; Ahmad, Mushtaq; Rasool, Kamran; Rafiq, M. A.; Hasan, M. M.

doi:10.1016/j.snb.2013.10.133

Cited by 16 publications

(11 citation statements)

References 42 publications

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“…However, at higher voltages the slope of IV curves changes and charge injection region can be seen which may be followed by space charge limited conduction at higher voltages. This type of conduction can be seen in our previous research reports published elsewhere 14 . The increase in slope and absence of ohmic region indicates the charge injection region (interface between material and electrical contact).…”

Section: Resultssupporting

confidence: 80%

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Study of electric conduction mechanisms in bismuth silicate nanofibers

Batool

Imran

Rasool

et al. 2020

Sci Rep

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This work represents the nature of conduction mechanism in bismuth silicate (BiSiO) nanofibers as a function of temperature and frequency. Scanning electron micrographs and X-rays diffraction patterns exhibited the formation of cubic phases of Bi 4 (Sio 4 ) 3 and Bi 12 Sio 20 nanofibers respectively with an average diameter of ~200 nm. Temperature dependent (300 K-400 K) electrical characterization of fibers was carried out in frequency range of ~20 Hz-2 MHz. The complex impedance analysis showed contribution from bulk and intergranular parts of nanofibers in conduction. Moreover, analysis of the Cole-Cole plot confirmed the space charge dependent behavior of BiSiO nanofibers. Two types of relaxation phenomena were observed through Modulus analysis. In ac conductivity curve, step like feature of plateau and dispersive regions were described by Maxwell-Wagner effect while the dc part obeyed the Arrhenius law. However, frequency dependent ac conductivity revealed the presence of conduction mechanism in diverse regions that was ascribed to large polaron tunneling model. Detailed analysis of complex Impedance and ac conductivity measurement showed negative temperature coefficient of resistance for the BiSiO nanofibers. Current-voltage (IV) characteristics represented ohmic conduction; followed by space charge limited current conduction at intermediate voltages. Results from both ac and dc measurements were in good agreement with each other.

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Section: Resultssupporting

confidence: 80%

“…The whole solution was stirred for about 90 minutes in a capped beaker. The final solution was loaded into a syringe and a voltage of 10 kV was applied between the tip of the needle and collector plate 13,14 . As spun PVP/ bismuth silicate nanofibers were collected on a copper plate.…”

Section: Methodsmentioning

confidence: 99%

Study of electric conduction mechanisms in bismuth silicate nanofibers

Batool

Imran

Rasool

et al. 2020

Sci Rep

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“…The polymerized silica sol was prepared via hydrolyzing tetraethyl orthosilicate single precursor (Molar ratio in the solution; TEOS: Ethanol: H 2 O: HCl = 1: 3.1: 1: 7 Â 10 À4 ) according to previously reported method [18]. PEO was used as a hydrophilic carrier polymer [28] with 0.2 wt% in final sol and nafion polymer with 40% in final composite nanofiber.…”

Section: Synthesis Of Electrospun Solution and Fabrication Of Composimentioning

confidence: 99%

“…The silica sols are one of the most investigated inorganic nanosol systems, which electrospun nanofibers have a number of potential application fields such as sensors [18], catalysis [19], scaffolding matrices [20,21], filtration and adsorption [22], via modifying silica sols with organic polymer. In this case, the silica sols were the inorganic candidate for hybridizing with organic polymer in this study.…”

Section: Introductionmentioning

confidence: 99%

Investigation into hybrid configuration in electrospun nafion/silica nanofiber

Yao

et al. 2015

Composites Part B: Engineering

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“…Up to date, ESF, similar to other types of electrospun fibers, have been employed mostly in applications such as catalyst templates, sensors, membranes and tissue scaffolds, to exploit the large surface‐to‐volume ratio . There are only a few studies on mechanical behavior of ESF‐reinforced composites.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of compression‐molded electrospun silica fiber/nylon‐6 composites

Wangworn

Wanakamol

2018

Polymer Composites

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In this study, we utilized electrospun silica fibers (ESFs) as reinforcement in sandwiched nylon-6 composites. The silica fibers were fabricated via electrospinning of sol-gel precursor, prepared from tetraethyl orthosilicate. The process yielded non-woven silica fiber mats with fiber diameter about 350 nm, which is much smaller than conventional glass fibers. Each ESF mat was sandwiched in between two nylon-6 sheets and the layers were compression-molded to produce a composite sample. These composites were prepared with varying silica fiber content, approximately at 0, 0.5, 1.0, and 1.9 wt%. The ESF blended well and chemically bonded with the nylon matrix, as observed through scanning electron microscopy and Fourier transform infrared spectroscopy. Tensile tests revealed that tensile modulus and tensile strength increased with ESF content. Notch Izod impact test showed that impact strength also increased with ESF content. The tensile and impact properties were significantly improved, considering the use of such low silica fiber percentages, which could be due to ultra-fine fiber diameter and fiber continuity. From flexural test, however, flexural modulus and flexural strength decreased slightly by the addition of ESF. Specimen geometry and fabrication process play important roles in governing the composites mechanical behavior. POLYM. COMPOS., 00:000-000,

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Oxygen sensing and transport properties of nanofibers of silica, bismuth doped silica and bismuth silicate prepared via electrospinning

Cited by 16 publications

References 42 publications

Study of electric conduction mechanisms in bismuth silicate nanofibers

Study of electric conduction mechanisms in bismuth silicate nanofibers

Investigation into hybrid configuration in electrospun nafion/silica nanofiber

Mechanical properties of compression‐molded electrospun silica fiber/nylon‐6 composites

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