Auto-ignition based synthesis of Y2O3 for photo- and thermo-luminescent applications

Krishna, R. Hari; Nagabhushana, B.M.; Nagabhushana, H.; Chakradhar, R.P.S.; Sivaramakrishna, R.; Shivakumara, C.; Thomas, Tiju

doi:10.1016/j.jallcom.2013.09.037

Cited by 58 publications

(34 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hari Krishna et al, reported TL response of UV irradiated Y 2 O 3 samples prepared by ethylene diamine tetra acetic acid (EDTA) and disodium ethylene diamine tetra acetic acid (Na 2 -EDTA) as fuels. EDTA based samples show a broad glow at 413 K while Na 2 -EDTA based samples show a broad glow at 428 K [23]. In present work, gamma irradiated U:Y 2 O 3 samples show well separated high intense low temperature glow peak (383 K) when compared to those results reported [12,13].…”

Section: Annealing Effectsupporting

confidence: 52%

“…4(b) shows the FE-SEM image of 1173 K annealed G:Y 2 O 3 and it is observed that the particles are agglomerated with spherical shape and the average particle size is found to be 28 nm [12,13]. In the present work, a large number of moles of gas are liberated in combustion process with urea when compared to glycine [19,23]. This indicates that, particles are loosely agglomerated as observed in U:Y 2 O 3 due to greater amount of gases escaping during combustion reaction.…”

Section: Fe-sem Micrograph Analysismentioning

confidence: 52%

“…The average crystallite size is found to be in the range [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] during combustion [19]. The lattice strain and crystallite size are estimated using Williamson-Hall (W-H) equation [20],…”

Section: Resultsmentioning

confidence: 99%

“…It is proved to be a powerful tool to obtain the elemental composition ratio [24] as shown in [5,23]. The peaks at 674, 854 and 1381, 1525 cm −1 are attributed to C-O bond bending [25] and C-O bond stretching, the peaks at 1633 and 1753 cm −1 are due to C = O stretching [25,26].…”

Section: Fe-sem Micrograph Analysismentioning

confidence: 99%

See 3 more Smart Citations

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Shivaramu

Lakshminarasappa

Nagabhushana

et al. 2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

View full text Add to dashboard Cite

Nanocrystalline Y 2 O 3 is synthesized by solution combustion technique using urea and glycine as fuels. X-ray diffraction (XRD) pattern of as prepared sample shows amorphous nature while annealed samples show cubic nature. The average crystallite size is calculated using Scherrer's formula and is found to be in the range 14-30 nm for samples synthesized using urea and 15-20 nm for samples synthesized using glycine respectively. Field emission scanning electron microscopy (FE-SEM) image of 1173 K annealed Y 2 O 3 samples show well separated spherical shape particles and the average particle size is found to be in the range 28-35 nm. Fourier transformed infrared (FTIR) and Raman spectroscopy reveals a stretching of Y-O bond. Electron spin resonance (ESR) shows V − center, O 2 − and Y 2+ defects. A broad photoluminescence (PL) emission with peak at~386 nm is observed when the sample is excited with 252 nm. Thermoluminescence (TL) properties of γ-irradiated Y 2 O 3 nanopowder are studied at a heating rate of 5 K s −1 . The samples prepared by using urea show a prominent and well resolved peak at~383 K and a weak one at~570 K. It is also found that TL glow peak intensity (I m1 ) at~383 K increases with increase in γ-dose up to~6.0 kGy and then decreases with increase in dose. However, glycine used Y 2 O 3 shows a prominent TL glow with peaks at 396 K and 590 K. Among the fuels, urea used Y 2 O 3 shows simple and well resolved TL glows. This might be due to fuel and hence particle size effect. The kinetic parameters are calculated by Chen's glow curve peak shape method and results are discussed in detail.

show abstract

Section: Annealing Effectsupporting

confidence: 52%

Section: Fe-sem Micrograph Analysismentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Fe-sem Micrograph Analysismentioning

confidence: 99%

See 2 more Smart Citations

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Shivaramu

Lakshminarasappa

Nagabhushana

et al. 2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

View full text Add to dashboard Cite

show abstract

“…In addition porosity is also one of the important factor on which SSA depends. It is well reported in the literature that solution combustion derived products exhibits high surface area due to the fact that the exothermicity during the combustion is long enough for the particle formation but too short for grain growth [34]. Figure 3 shows the surface area and pore size distribution of the CuFe 2 O 4 adsorbent evaluated from nitrogen adsorption and desorption isotherms.…”

Section: Specific Surface Areamentioning

confidence: 93%

Removal of malachite green from aqueous solution by magnetic CuFe2O4 nano-adsorbent synthesized by one pot solution combustion method

et al. 2017

Self Cite

View full text Add to dashboard Cite

In the present investigation nano copper ferrite, CuFe 2 O 4 (CF) is synthesized by one pot energy saving solution combustion synthesis. The combustion derived copper ferrite nanoadsorbent is characterized by powder X-ray diffraction, Fourier transform infra-red spectroscopy, scanning electron microscopy, transmission electron microscopy and UV-Vis spectroscopy. The magnetic behavior is studied by Vibrating sample magnetometer measurements and the results shows it's a soft ferromagnet with low saturation magnetization and coercive effect. CF nanopowder is used as good magnetically separable nanoadsorbent. Adsorption property is evaluated by the removal of malachite green, a dye which is widely used by many industries, from its aqueous solution. Various parameters like contact time (5-30 min), adsorbent loading (0-45 mg) are investigated systematically by batch experiments. Adsorption isotherms and kinetic studies also conducted which shows that the adsorption follows pseudo second order mechanism. The experimental data fitted well with the Langmuir isotherm (R 2 = 0.978), yielding a maximum adsorption capacity of 22 mg/g. The optimum adsorbent dose was found to be 40 mg/L and stirring time experiment reveals that 85% of decolourization was observed for 30 min of stirring at neutral pH which is much more efficient than those reported in literature. Graphical abstract

show abstract

Optical properties of Eu3+ activated SrLa2O4 red-emitting phosphors for WLED applications

Perumal¹,

Subalakshmi²,

Varadarajan

et al. 2017

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Auto-ignition based synthesis of Y2O3 for photo- and thermo-luminescent applications

Cited by 58 publications

References 38 publications

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Removal of malachite green from aqueous solution by magnetic CuFe2O4 nano-adsorbent synthesized by one pot solution combustion method

Optical properties of Eu3+ activated SrLa2O4 red-emitting phosphors for WLED applications

Contact Info

Product

Resources

About