Thermoluminescent characterization of HfO2:Tb3+ synthesized by hydrothermal route

Montes, Emilio Fontela; Ceron, P.; Montalvo, T. Rivera; Guzman, J.; Garcı́a-Hipólito, M.; Soto-Guzman, Adriana; García-Salcedo, Ricardo; Falcony, C.

doi:10.1016/j.apradiso.2013.06.008

Cited by 21 publications

(12 citation statements)

References 12 publications

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“…HfO 2 nanoparticles in the size range of 25-75 nm were prepared by precipitation [9] and sol-gel [10] in the temperatures range of 500-800°C. Low-temperature techniques as hydrothermal (200°C) [11] and microwave-hydrothermal (140°C) [12] were used to prepare semispherical and rice like particles in sizes between 14 and 75 nm. HfO 2 films were deposited on Si substrate and heated above 600°C by pulsed laser deposition technique [13].…”

Section: Introductionmentioning

confidence: 99%

A “green methodology” approach to the synthesis of HfO2 nanoparticles

Quintero-García

Puente-Urbina²,

Garcı́a-Cerda³

et al. 2015

Materials Letters

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Section: Introductionmentioning

confidence: 99%

A “green methodology” approach to the synthesis of HfO2 nanoparticles

Quintero-García

Puente-Urbina²,

Garcı́a-Cerda³

et al. 2015

Materials Letters

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“…Recently, many efforts have been undertaken to improve the synthesis method. As a promising approach, hydrothermal synthesis [16][17][18] is widely used to synthesize nanocrystalline oxide materials due to the mild reaction condition, simple operation and no roasting. A. Sahraneshin 16 synthesized three differently shaped HfO 2 NPs via a surfactant-assisted hydrothermal reaction in highly alkaline media.…”

Section: Introductionmentioning

confidence: 99%

Formation mechanism of hafnium oxide nanoparticles by a hydrothermal route

Wan

Zhou

2017

RSC Adv.

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“…23 Experimental studies give, however, mixed results on the exact nature of phase (tetragonal vs cubic) stabilized by lanthanides in hafnia. For example, based on XRD patterns, a tetragonal phase is confirmed in HfO 2 doped with 20% Tb [thin films, 54 15% Tb [nanoparticles, 55 7% Lu [nanoparticles, 56 cubic in 5% up to 15% Eu doped HfO 2 nanoparticles, or 10% Eu (or 1% Eu 10% Lu) 8 and 7% Lu doped HfO 2 nanoparticles. 48 On the basis of the XRD patterns and Raman spectra, the formation of a tetragonal phase is confirmed in Eu (10 and 15%) doped HfO 2 [nanoparticles, 28 or 25% Eu [nanopowders and thin films.…”

Section: Resultsmentioning

confidence: 99%

Phase Control in Hafnia: New Synthesis Approach and Convergence of Average and Local Structure Properties

et al. 2019

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Technologically relevant tetragonal/cubic phases of HfO 2 can be stabilized at room temperature by doping with trivalent rare earths using various approaches denoted generically as bulk coprecipitation. Using in situ/ex situ X-ray diffraction (XRD), Raman spectroscopy, high-resolution transmission electron microscopy, and in situ/ex situ site-selective, time-gated luminescence spectroscopy, we show that wet impregnation of hafnia nanoparticles with 10% Eu oxide followed by mild calcination in air at 500 °C produces an efficient stabilization of the cubic phase, comparable to that obtained by bulk precipitation. The physical reasons behind the apparently conflictual data concerning the actual crystallographic phase and the local symmetry around the Eu stabilizer and how these can be mediated by luminescence analysis are also discussed. Apparently, the cubic crystal structure symmetry determined by XRD results in a pseudocubic/tetragonal local structure around Eu determined by luminescence. Considering the recent findings on wet impregnated CeO 2 and ZrO 2 , it is concluded that CeO 2 , ZrO 2 , and HfO 2 represent a unique case of a family of oxides that is extremely tolerant to heavy doping by wet impregnation. In this way, the same batch of preformed nanoparticles can be doped with different lanthanide concentrations or with various lanthanides at a fixed concentration, allowing a systematic and reliable investigation of the effect of doping, lanthanide type, and lanthanide concentration on the various functionalities of these technologically relevant oxides.

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Thermoluminescent characterization of HfO2:Tb3+ synthesized by hydrothermal route

Cited by 21 publications

References 12 publications

A “green methodology” approach to the synthesis of HfO2 nanoparticles

A “green methodology” approach to the synthesis of HfO2 nanoparticles

Formation mechanism of hafnium oxide nanoparticles by a hydrothermal route

Phase Control in Hafnia: New Synthesis Approach and Convergence of Average and Local Structure Properties

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