Structural and luminescence properties of undoped, Nd3+ and Er3+ doped TiO2 nanoparticles synthesized by flame spray pyrolysis method

Yıldırım, Serdar; Yurddaşkal, Metin; Dikici, Tuncay; Aritman, Idil; Ertekin, Kadriye; Çelik, Erdal

doi:10.1016/j.ceramint.2016.03.131

Cited by 37 publications

(9 citation statements)

References 24 publications

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“…Three transitions from 4 F 3/2 to its lower 4 I 9/2 , 4 I 11/2 and 4 I 13/2 are obtained with an excitation of 752 nm. The transitions correspond well with the reported data of Nd 3+ in anatase matrix [34,40,84]. The position and shape of 4 F 3/2 → 4 I 9/2 strongly suggest Nd-doped TiO 2 anatase sample, without the presence of other compositions of segregated neodymium oxide and neodymium titanate phases [34].…”

Section: Neodymiumsupporting

confidence: 89%

Rare Earth‐Doped Anatase TiO2 Nanoparticles

Đorđević¹,

Milićević²,

Dramićanin³

2017

Titanium Dioxide

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Titanium dioxide is a wide band-gap semiconductor of high chemical stability, nontoxicity and large refractive index. Because of the high photocatalytic activity, anatase is a preferred TiO 2 form in many applications such as for air and water splitting and purification. Doping of TiO 2 with various ions can increase the photocatalytic activity by enhancing light absorption in visible region and can alter structure, surface area and morphology. Also, by doping TiO 2 with optically active ions, visible light via up-or downconversion luminescence can be produced. It is a challenge to optimize the synthesis procedure to incorporate rare earth RE 3+ ions into the TiO 2 structure due to large mismatch in ionic radii between the Ti 4+ and RE 3+ and because of the charge imbalance. Visible (VIS) and ultraviolet (UV) luminescence of several RE 3+ ions can be obtained when incorporated into anatase TiO 2 , also affecting microstructural characteristics of TiO 2. It is of great importance to summarize publications on rare earth-doped anatase TiO 2 nanoparticles to find correct TiO 2-RE combination to sensitize trivalent rare earths luminescence, as well as to predict or tune structural and morphological properties. A better understanding on these topics may progress the desired design of this kind of material towards specific applications.

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Section: Neodymiumsupporting

confidence: 89%

Rare Earth‐Doped Anatase TiO2 Nanoparticles

Đorđević¹,

Milićević²,

Dramićanin³

2017

Titanium Dioxide

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“…Crystal Structure of Sr 0.5 Ca 0.5 WO 4 :Eu 3+ Generally, the anticipated optimum crystallinity phosphors have stronger lighting and smaller traps. Besides, crystallization and phase structure are some of the important parameters for luminescent materials [19]. The crystallinity of the host Sr 0,5 Ca 0,5 WO 4 luminescent powder and its Eu 3+ doped variety were examined by X-ray diffraction.…”

Section: Resultsmentioning

confidence: 99%

Sol-Jel Tekniği ile Sentezlenmiş Sr0,5Ca0,5WO4 Fosforunda Eu3+ İyonunun Lüminesans, TL Kinetik Parametreler ve Elektrokimyasal Davranışındaki Rolü

Katı

Keski̇n

Türemiş

et al. 2021

El-Cezeri Fen Ve Mühendislik Dergisi

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The Eu 3+ doped Sr 0,5 Ca 0,5 WO 4 has been synthesized by the sol-gel method for the first time. The phosphors were analyzed by XRD, SEM, DTA/TG optical absorption spectra, radioluminescence (RL), photoluminescence (PL), and thermoluminescence (TL) spectra. The energy transfer mechanism was determined on Eu 3+ doped Sr 0,5 Ca 0,5 WO 4 phosphor. The XRD results reveal that the samples exhibit a tetragonal scheelite structure. FT-IR spectra provide the proof of scheelite structure with W-O anti-symmetric stretching vibration in [WO 4 ] 2tetrahedrons at 750-910 cm -1 . The Sr 0,5 Ca 0,5 WO 4 phosphor showed a broad emission between 350-750 nm with a maximum of 506 nm. Sr 0,5 Ca 0,5 WO 4 :0.5Eu 3+ phosphor exhibit characteristic emissions of Eu +3 (545, 592, 614, 650, and 700 nm) in the RL spectrum. The host material has excellent energy transfer efficiency for lanthanide ions. The kinetic parameters were calculated by the computerized glow curve deconvolution (CGCD) analysis method. As a result of CGCD, three peaks (E trap :0.74-1.46 eV) for un-doped Sr 0,5 Ca 0,5 WO 4 and five peaks (E trap :0.75-1.28 eV) for Sr 0,5 Ca 0,5 WO 4 : Eu 3+ were determined under main TL glow curve. In the cyclic voltammogram of the doped sample, an oxidation peak of about -0.4 eV, which is thought to be derived from Eu 3+ , was observed. Based on the results, the Sr 0,5 Ca 0,5 WO 4 :Eu +3 phosphors may be potential applicants for LEDs.

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“…IGZO üretimi için kullanılan malzemeler ve miktarları2.2. Nanopartiküllerin SenteziAlev spreyi ile sentezlenen nanopartiküllerin üretimi önceki çalışmalara göre yapılmıştır[22,23]. Np10'un (Tethis, Milan, İtalya) alevli sprey piroliz ekipmanı deneyler boyunca kullanıldı.…”

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Synthesis and Characterization of IGZO Nanoparticles Using Flame Spray Pyrolysis Method

Yıldırım

2021

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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ÖzYüksek elektron mobilitesi, düşük eşik gerilimi ve kaplama sonrası şeffaf özellik gösteren İndiyum Galyum Çinko Oksit (InGaZnO4, IGZO) malzemesi ekran teknolojilerinde artan bir ivmeyle kullanılmaktadır. Bu çalışmada, IGZO nanopartikülleri alev püskürtme piroliz yöntemi kullanılarak tek aşamada başarıyla sentezlendi. Üretilen nanopartiküllerin faz ve element analizleri, sırasıyla X-ışını kırınımı (XRD) ve X-ışını fotoelektron spektroskopisi (XPS) ölçümleriyle yapıldı. Isıl işlem öncesi XRD analizinde amorf yapı gözlemlenirken, 1200 o C de yapılan kalsinasyon sonucu rombohedral kristalin InGaZnO4 yapısı tespit edildi. Elementel analiz sonucunda yapı içerisinde In, Ga, Zn ve O elementlerinin varlığı kanıtlandı. Yüzey morfolojisi ve partikül büyüklüğü taramalı elektron mikroskobu (SEM) kullanılarak tespit edilirken, nanopartiküllerin parçacık boyutlarının <100 nm den küçük ve yarı küresel olduğu bulundu. UV uyarma altında nanopartiküllerin fotolüminesans ve optik bozulma zamanı karakterizasyonları incelenmiş ve 380 nm uyarma altında IGZO nanopartikülleri, 510 nm ve 570 nm civarında emisyon sergilemiştir. Bu uyarma ve emisyon altında yapılan optik bozulma süresi iki üstelli ve 32,36 µs olarak hesaplanmıştır.

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Structural and luminescence properties of undoped, Nd3+ and Er3+ doped TiO2 nanoparticles synthesized by flame spray pyrolysis method

Cited by 37 publications

References 24 publications

Rare Earth‐Doped Anatase TiO2 Nanoparticles

Rare Earth‐Doped Anatase TiO2 Nanoparticles

Sol-Jel Tekniği ile Sentezlenmiş Sr0,5Ca0,5WO4 Fosforunda Eu3+ İyonunun Lüminesans, TL Kinetik Parametreler ve Elektrokimyasal Davranışındaki Rolü

Synthesis and Characterization of IGZO Nanoparticles Using Flame Spray Pyrolysis Method

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