Synthesis and characterization of erbia doped metal oxide nanofibers for applications in thermophotovoltaics

Bender, Edward T.; Wang, R.; Aljarrah, Mohannad T.; Evans, Edward A.; Ramsier, R. D.

doi:10.1116/1.2742390

Cited by 13 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned in our previous work [15], annealing pure erbia powder at different temperatures does not effect the electronic transitions of the Er 3+ ions due to the lack of significant crystal phase changes at higher annealing temperatures. The samples were all heated to 500 o C by using a heating gun which forces hot air through a quartz tube.…”

Section: Thermal Emission (Ftir) Measurementsmentioning

confidence: 55%

See 1 more Smart Citation

Nanofiber Based Er(III) Metal Pyrochlore Oxides: Synthesis and Characterization

et al. 2007

View full text Add to dashboard Cite

Erbium(III) doped TiO 2 nanofibers (Er 2 Ti 2 O 7 ) have been synthesized by electrospinning mixtures of polymers, metal-containing materials, and erbium acetate. These electrospun nanofibers were subsequently annealed at temperatures of 550, 750, 950, and 1150 o C to remove the organics and leave behind the metal oxides. The crystal structure and optical properties of the nanofiber pyrochlores were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), and Fourier transformation IR (FTIR) spectroscopy. Different crystal structures were formed by controlling the annealing conditions. XRD data are compared with near-IR spectra to better understand the effects of annealing temperature on the Er (III) thermally-excited selective optical emission process.

show abstract

Section: Thermal Emission (Ftir) Measurementsmentioning

confidence: 55%

“…As described in previous work [15], the fibers were spun at a high voltage of 20 kV and collected in the form of a nonwoven sheet on a turning aluminum foil collector placed at a distance of 15 cm from the tip of the needle. and erbium (III) acetate hydrate (Aldrich, 99.9%).…”

Section: Methodsmentioning

confidence: 99%

Nanofiber Based Er(III) Metal Pyrochlore Oxides: Synthesis and Characterization

et al. 2007

View full text Add to dashboard Cite

show abstract

“…͑26͒ and ͑27͒. 8 The values of reflectance and transmittance at 1.53 m can be used to calculate the index of refraction and the extinction coefficient of the sample according to Eqs. The measurements are performed under vacuum ͑typically 3 mbar͒ with a resolution of 4 cm −1 .…”

Section: B Optical Propertiesmentioning

confidence: 99%

“…In addition to the spectral match with the PV cell, the emitter should be chemically and mechanically stable. 8,9 Electrospun ceramic fibers are porous in nature, have diameters in the submicron range, and have a very high surface to volume ratio. 3 The first emission data for rare earth oxide published by Guazzoni 4 used specimens of rare earth powders pressed into thin disks.…”

Section: Introductionmentioning

confidence: 99%

Experimental characterization and modeling of a nanofiber-based selective emitter for thermophotovoltaic energy conversion: The effect of optical properties

Aljarrah

Wang

Evans

et al. 2011

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

The effect of nanofiber based filter morphology on bacteria deactivation during water filtration AIP Conf. Proc. 1526, 316 (2013); 10.1063/1.4802626Microwave Hall mobility and electrical properties of electrospun polymer nanofibers Aluminum oxide nanofibers doped with erbium oxide have been synthesized by calcining polymer fibers made by the electrospinning technique using a mixture of aluminum acetate, erbium acetate and polyvinylpyrrolidone dissolved in ethanol. The resulting ceramic fibers are used to fabricate a free-standing selective emitter. The general equation of radiation transfer coupled with experimentally measured optical properties is used to model the net radiation obtained from these structures. It has been found that the index of refraction and the extinction coefficient are direct functions of the erbia doping level in the fibers. The fibers radiated in a selective manner at ϳ1.53 m with an efficiency of about 90%. For a fiber film on a substrate, the effect of film thickness, extinction coefficient and substrate emissivity on the overall emitter emissivity is also investigated in this study. Results show that the emissivity of the film increases as the thickness of the film increases up to a maximum value, after which increasing the film thickness had no effect on emissivity. Furthermore, it has been found that the substrate emissivity increases the amount of off-band radiation. This effect can be mitigated by controlling the film thickness.

show abstract

Structure and composition of electrospun titania nanofibres doped with Eu

Mezzi

Kačiulis

Cacciotti

et al. 2010

Surface & Interface Analysis

View full text Add to dashboard Cite

Electrospinning technique was used to prepare the nanofibres of pure and Europium (Eu)-doped titania with Eu content of 3-10%mol. The solution was electrospun in air at room temperature. The obtained fibrous mats were thermally treated at 500 or 1000• C. Morphology and phase analyses of the resulting fibrous ceramic mats were carried out by using SEM and X-ray diffraction (XRD), while the surface chemical composition was investigated by XPS. Annealed mats consisted of randomly oriented fibres with fairly uniform and nanometric diameter, dependent on the doping level. The main titania phase in the samples, heated at 500• C, was anatase, whereas rutile phase with small traces of Eu 2 Ti 2 O 7 were identified in the samples calcined at 1000 • C. From the XPS analysis, it was determined that all the samples were composed of Ti 4+ and Eu 3+ species. XPS quantification of annealed samples revealed a surface enrichment with Eu. XPS depth profiles demonstrated that the chemical composition of the samples was constant. Moreover, it was observed that the Ti 4+ reduction, induced by ion sputtering, decreased in the samples with higher concentration of Eu dopant.

show abstract

Synthesis and characterization of erbia doped metal oxide nanofibers for applications in thermophotovoltaics

Cited by 13 publications

References 14 publications

Nanofiber Based Er(III) Metal Pyrochlore Oxides: Synthesis and Characterization

Nanofiber Based Er(III) Metal Pyrochlore Oxides: Synthesis and Characterization

Experimental characterization and modeling of a nanofiber-based selective emitter for thermophotovoltaic energy conversion: The effect of optical properties

Structure and composition of electrospun titania nanofibres doped with Eu

Contact Info

Product

Resources

About