Facile synthesis of zirconia nanoparticles using a salt-assisted ultrasonic spray pyrolysis combined with a citrate precursor method

Hwangbo, Young; Lee, Young In

doi:10.1016/j.jallcom.2018.08.308

Cited by 39 publications

(6 citation statements)

References 41 publications

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“…The ultrasonic spray pyrolysis method is characteristic of the production of materials with spherical morphology, where the alteration of synthesis parameters such as reaction time, starting materials and flow velocity influence the densification and surface morphology of the spheres [90,91]. The surface area is an important factor for the photocatalytic activity, where particles with larger surface areas usually present better results [92].…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity

Santiago

Neto

Longo

et al. 2019

J Mater Sci: Mater Electron

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In this work, CeO 2 :xEu 3+ (x = 0, 0.01, 0.02, 0.04 and 0.08 mol%) microspheres were obtained by the fast and continuous ultrasonic spray pyrolysis method. Powders were characterized by X-ray diffraction (XRD), X-ray fluorescence analysis (XRF), scanning electronic microscopy (FESEM), Raman spectra, UV-Visible spectroscopy (UV-Vis) and photocatalytic activity. All XRD patterns were indexed by the cubic structure of the fluorite type, without the presence of secondary phases, indicating success in the Eu 3+ doping in the CeO 2 structure. In addition, The XRF analysis confirmed the presence of Eu in the CeO 2 powders. In the Raman spectra of the samples occurs the vibrational mode F 2g , which is a characteristic band of materials with the fluorite type structure. Moreover, as the Eu 3+ ion increased, it was noticed the appearance of additional bands referring to oxygen vacancies. FESEM showed that the CeO 2 :xEu 3+ particles have a spherical morphology with homogeneous chemical composition and particle size between 73 and 1560 nm. It can be seen a slight increase of defects in their morphology as the Eu 3+ ion increases. The band gap varies between 3.22 and 3.28 eV, being influenced by defects in oxygen vacancies and the concentration of Ce 3+ ion. The addition of Eu 3+ generates the introduction of intermediary levels in the conduction band of CeO 2 , besides increasing the reactive species effects, favoring the photocatalysis of Rhodamine B dye.

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Section: Photocatalytic Activitymentioning

confidence: 99%

Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity

Santiago

Neto

Longo

et al. 2019

J Mater Sci: Mater Electron

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“…However, none of the theories for explaining the metastability of the tetragonal phase have been widely accepted. t-ZrO 2 powders have been prepared at mild temperature using many methods such as coprecipitation [14], thermal decomposition [15], sonochemical process [16], spray pyrolysis [17], sol-gel method [18], microwave irradiation [19], and hydrothermal method [20]. It is important for the scientific community to develop a rapid, simple, and energy-efficient approach to produce fine t-ZrO 2 powders.…”

Section: Some Authors Have Listed Various Factors Like Precipitation ...mentioning

confidence: 99%

Electronic structure and defect‐induced luminescence study of phase‐stabilized t‐ZrO₂ nanocrystals

et al. 2023

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Luminescent tetragonal‐ZrO2 (t‐ZrO2) nanocrystals were synthesized using an optimized combustion method without post‐synthesis annealing and characterized using X‐ray diffraction, electron microscopy, Raman spectroscopy, X‐ray photoelectron spectroscopy, UV–Vis. spectroscopy, photoluminescence spectroscopy, thermoluminescence (TL), and vibrating sample magnetometry. The as‐synthesized t‐ZrO2 nanocrystals have a bandgap of 4.65 eV and exhibit defect‐assisted blue emission (Commission Internationale de I'Elcairage coordinates 0.2294, 0.1984) when excited at 270 nm. The defect states were qualitatively and quantitatively analyzed using TL after irradiating nanocrystals with γ‐ and UV radiations at various doses. The TL glow curves show intense emission in the high‐temperature region from 523 to 673 K for both UV‐ and γ‐irradiated samples; however, another less‐intense TL peak was also observed in the low‐temperature region from 333 to 453 K with γ irradiation at higher doses, indicating the formation of shallow trapping states. The activation energies, frequency factor, and order of kinetics were estimated using the computerized glow curve deconvolution method for the shallow and deep traps for γ‐ and UV‐irradiated samples. The present study shows that phase‐stabilized t‐ZrO2 nanocrystals are potential candidates for luminescence‐based applications.

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“…The m-ZrO 2 phase has stability up to 1100°C, while t-ZrO 2 is stable in the temperature range of 1100-2370°C, and the most stable c-ZrO 2 form can be found even at higher temperatures (>2370°C) (Nazir et al, 2021) . For the synthesis of ZrO 2 NPs with varying phases, several techniques are being developed including the hydrolysis (Marković and Milonjić, 2006) , sol-gel (Guel et al, 2017) , spray pyrolysis (Waghmare et al, 2018) , vapor phase (Moravec et al, 2007) , pyrolysis (Hwangbo and Lee, 2019) , microwave plasma (Vollath and Szabó, 2006) , hydrothermal (Behbahani et al, 2012) , co-precipitation (Mei et al, 2013) , combustion (Dobrosz-Gomez et al, 2015 , and ultrasonication (Guel et al, 2017) . The combustion, co-precipitation, and microwave plasma routes generate highly porous c-ZrO 2 NPs having a well-organized morphology, while the sonochemical/ultrasoni cation method produces t-ZrO 2 and the hydrothermal, sol-gel, hydrolysis methods offer m-ZrO 2 NPs.…”

Section: Introductionmentioning

confidence: 99%

One-pot Hydrothermal Synthesis and Characterization of Zirconium Oxide Nanoparticles

Sagadevan,

Lett,

Fatimah

2023

Sci. Technol. Indones

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Zirconia (also known as zirconium dioxide, ZrO2) is a white crystalline naturally occurring mineral that offers excellent optical, dielectric, and mechanical properties. Considering these properties and referring to previous studies on the optimization of ZrO2 NPs synthesis, in the present study, we studied the crystalline, optical, and fluorescence properties of ZrO2 nanoparticles (NPs) formed by the hydrothermal synthesis route. The physicochemical features of the nanoparticles were examined in the photocatalytic oxidation of rhodamine B. From the powder XRD analysis, the ZrO2 NPs were found to be highly crystalline, while the fluorescence (FL) spectra indicated an emission band at 473 nm, which could be linked to a blue shift. Also, the FTIR and Raman spectroscopies confirmed the functionality and bonding, and in addition, the XPS analysis provided the elemental peaks of Zr 3d and O 1s, where all these analyses evidenced the successful formation of ZrO2. Examination of the photocatalytic activity of ZrO2 NPs revealed the capability of the material for rhodamine B photocatalytic degradation effectively, with a degradation efficiency of 86% after 2 h of treatment. Moreover, the nanoparticles exhibited stability and reusability over five cycles. Overall, from the analysis, ZrO2 NPs can be easily formed via the hydrothermal route with tailored optical and fluorescence properties to find applications in the electronics industry for the manufacturing of light emitting devices.

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Facile synthesis of zirconia nanoparticles using a salt-assisted ultrasonic spray pyrolysis combined with a citrate precursor method

Cited by 39 publications

References 41 publications

Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity

Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity

Electronic structure and defect‐induced luminescence study of phase‐stabilized t‐ZrO₂ nanocrystals

One-pot Hydrothermal Synthesis and Characterization of Zirconium Oxide Nanoparticles

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Facile synthesis of zirconia nanoparticles using a salt-assisted ultrasonic spray pyrolysis combined with a citrate precursor method

Cited by 39 publications

References 41 publications

Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity

Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity

Electronic structure and defect‐induced luminescence study of phase‐stabilized t‐ZrO2 nanocrystals

One-pot Hydrothermal Synthesis and Characterization of Zirconium Oxide Nanoparticles

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Electronic structure and defect‐induced luminescence study of phase‐stabilized t‐ZrO₂ nanocrystals