Ionoluminescence studies of combustion synthesized Dy3+ doped nano crystalline forsterite

Lakshminarasappa, B.N.; Prashantha, S.C.; Singh, Fouran

doi:10.1016/j.cap.2011.03.055

Cited by 33 publications

(5 citation statements)

References 28 publications

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“…Emission peaks at 488, 584 and 670 nm are slightly broadened because of several stark levels of 4 F 9/2 and 6 H J (J¼15/2, 13/2, 11/2) and then split into Jþ 1/2 Stark levels due to Dy 3 þ ion (Kramer's ion) in the lower symmetry site [7]. Similar results on Mg 2 SiO 4 :Dy 3 þ are reported by Lakshminarasappa et al [35].…”

Section: Resultssupporting

confidence: 76%

Ion beam induced luminescence studies of sol gel derived Y2O3:Dy3+ nanophosphors

Shivaramu

Nagabhushana

Lakshminarasappa

et al. 2016

Journal of Luminescence

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a b s t r a c tPure and Dy 3 þ doped Y 2 O 3 are prepared by sol-gel technique. The samples are annealed at 900°C to obtain crystalline phase. X-ray diffraction (XRD) patterns confirm cubic phase of Y 2 O 3 . The crystallites size is calculated using Scherrer formula and is found to be in the order of 29.67 nm. The particles are found to be spherical in nature and their sizes are estimated to be 35 nm by scanning electron microscope (SEM) technique. Online ionoluminescence (IL) spectra of pure and Dy 3 þ doped Y 2 O 3 are recorded with 100 MeV Si 8 þ ions with fluence in the range 0.375-6.75 Â 10 13 ions cm À 2 . Undoped samples do not show IL emission for any of the fluence explored. Four prominent IL emissions with peaks at 488, 670, 767 nm and a prominent pair at 574 and 584 nm are observed in Dy 3 þ doped samples. These characteristic emissions are attributed to luminescence centers activated by Dy 3 þ ions due to 4 F 9/2 -6 H 15/2 , 4 F 9/2 -6 H 11/2, 4 F 9/2 -6 H 9/2 þ 6 H 11/2 and 4 F 9/2 -6 H 13/2 transitions respectively. Further, it is found that IL intensity at 574 nm decays rapidly with ion fluence. A broad and weak photoluminescence (PL) emission with peak at $ 485 nm and a strong emission at 573 nm are observed in ion irradiated Y 2 O 3 :Dy 3 þ . It is found that PL intensity increases with ion fluence up to 3 Â 10 10 ions cm À 2 and then it decreases with further increase of ion fluence. This may be attributed to lattice disorder produced by dense electronic excitation under swift heavy ion irradiation.

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Section: Resultssupporting

confidence: 76%

Ion beam induced luminescence studies of sol gel derived Y2O3:Dy3+ nanophosphors

Shivaramu

Nagabhushana

Lakshminarasappa

et al. 2016

Journal of Luminescence

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“…When RE 3þ cations doped into the host, they could probably occupy both sites. Based on this, Eu 3 þ is chosen to study luminescent properties of the material [4,40,41]. Fig.…”

Section: Resultsmentioning

confidence: 99%

100MeV Si8+ ion induced luminescence and thermoluminescence of nanocrystalline Mg2SiO4:Eu3+

Prashantha¹,

Lakshminarasappa²,

Singh³

2012

Journal of Luminescence

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a b s t r a c tNanoparticles of Mg 2 SiO 4 :Eu 3 þ have been prepared by the solution combustion technique and the grain size estimated by PXRD is found to be in the range 40-50 nm. Ionoluminescence (IL) studies of Mg 2 SiO 4 :Eu 3 þ pellets bombarded with 100 MeV Si 8 þ ions with fluences in the range 1.124-22.48 Â 10 12 ions cm À 2 are carried out at IUAC, New Delhi, India. Five prominent IL bands with peaks at 580 nm, 590 nm, 612 nm, 655 nm and 705 nm are recorded. These characteristic emissions are attributed to the luminescence centers activated by Eu 3 þ cations. It is found that IL intensity decreases rapidly in the beginning. Later on, the intensity decreases slowly with further increase of ion fluence. The reduction in the ionoluminescence intensity with increase of ion fluence might be attributed to degradation of Si-O (n 3 ) and Si-O (2n 3 ) bonds present on the surface of the sample. The red emission with peak at 612 nm is due to characteristic emission of 5 D 0 -7 F 2 of the Eu 3 þ cations. Thermoluminescence (TL) studies of Mg 2 SiO 4 :Eu 3 þ pellets bombarded with 100 MeV Si 8 þ cations with fluences in the range 5 Â 10 11 ions cm À 2 to 5 Â 10 13 ions cm À 2 are made at RT. Two prominent and well resolved TL glows with peaks at $ 220 1C and $ 370 1C are observed. It is observed that TL intensity increases with increase of ion fluence. This might be due to creation of new traps during swift heavy ion irradiation.

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“…According to the proposed mechanism, when light energy strikes the catalyst's surface, the electron in the valence band (VB) is stimulated to the empty conduction band (CB) (Figure 10), resulting in the production of electron-hole, which further react with the pollutant causing the formation of hydroxyl radicals or singlet oxygen radicals or holes which are responsible for the pollutant degradation [26][27][28].…”

Section: Morphological Studiesmentioning

confidence: 99%

Synthesis of ZrO₂:Dy³⁺ Nanoparticles: Photoluminescent, Photocatalytic, and Electrochemical Sensor Studies

Gurushantha

Anantharaju

Kottam

et al. 2022

Adsorption Science & Technology

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Solution combustion was employed to create a series of ZrO2:Dy3+ (1-11 mol percent) nanoparticles (NPs) using oxalyl dihydrazide (ODH) as the fuel. ZrO2:Dy3+ NPs were subjected to calcination at about 700°C. ZrO2:Dy3+ NPs comprised of 1 to 11 mol% of Dy3+ were characterized by employing the X-ray diffraction (XRD), transmission electron microscopic (TEM), UV-visible, and X-ray photoelectron spectroscopic (XPS) techniques. The crystallite diameters of 1 to 11 mol% ZrO2:Dy3+ NPs were observed to range from 8.1 nm to 16.3 nm, exhibiting spherical shape. According to BET tests, the pore volume of ZrO2:Dy3+ NPs was determined to be 100.129 cm3/g. The mean pore diameter of ZrO2:Dy3+ NPs was determined to be 4.803 nm from the Barrett-Joyner-Halenda (BJH) plot. The photoluminescence and photocatalytic dye degradation properties of ZrO2:Dy3+ NPs were investigated. The acid red 88 (AR88) dye was applied to appraise the photocatalytic activities of the NPs under UV irradiation. ZrO2:Dy3+ NPs with 3 mol% Dy3+ exhibited improvised photocatalytic activity due to the operative departure of charge carriers. The electrochemical examination of ZrO2:Dy3+ NP modified carbon paste electrode in 0.1 N HCl demonstrated considerable redox potential output, as evidenced by cyclic voltammetric and amperometric measurements. The electrochemical sensor studies on ZrO2:Dy3+ NPs exhibited potentiality towards sensing of highly toxic metals like mercury and lead.

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Ionoluminescence studies of combustion synthesized Dy3+ doped nano crystalline forsterite

Cited by 33 publications

References 28 publications

Ion beam induced luminescence studies of sol gel derived Y2O3:Dy3+ nanophosphors

Ion beam induced luminescence studies of sol gel derived Y2O3:Dy3+ nanophosphors

100MeV Si8+ ion induced luminescence and thermoluminescence of nanocrystalline Mg2SiO4:Eu3+

Synthesis of ZrO₂:Dy³⁺ Nanoparticles: Photoluminescent, Photocatalytic, and Electrochemical Sensor Studies

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Ionoluminescence studies of combustion synthesized Dy3+ doped nano crystalline forsterite

Cited by 33 publications

References 28 publications

Ion beam induced luminescence studies of sol gel derived Y2O3:Dy3+ nanophosphors

Ion beam induced luminescence studies of sol gel derived Y2O3:Dy3+ nanophosphors

100MeV Si8+ ion induced luminescence and thermoluminescence of nanocrystalline Mg2SiO4:Eu3+

Synthesis of ZrO2:Dy3+ Nanoparticles: Photoluminescent, Photocatalytic, and Electrochemical Sensor Studies

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Synthesis of ZrO₂:Dy³⁺ Nanoparticles: Photoluminescent, Photocatalytic, and Electrochemical Sensor Studies