Synthesis and characterization of nanocrystallined zirconia by hydrothermal method

Kanade, K.G.; Baeg, Jin‐Ook; Apte, Sanjay K.; Prakash, T. L.; Kale, Bharat B.

doi:10.1016/j.materresbull.2007.03.025

Cited by 76 publications

(42 citation statements)

References 24 publications

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“…Also can be seen two weak peaks at 377 nm (3.29 eV) and 320 (3.87 eV) that can be owing to the mid-gap trap states involvement including the defects of the surface and oxygen vacancies. 28,29 The estimated optical band gap of the sample is lower than those of bulk ZrO 2 . The obtained data are in good agreement with previous report.…”

Section: Resultsmentioning

confidence: 87%

Zirconia Nanostructures: Novel Facile Surfactant‐Free Preparation and Characterization

Zinatloo-Ajabshir

Salavati‐Niasari

2015

Int J Applied Ceramic Tech

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Zirconia nanostructures have been prepared via a facile precipitation route using Zirconium (IV) oxynitrate hydrate and tetraethylenepentamine (TEPA). Here, TEPA was used as novel precipitator to fabricate zirconia nanostructures. The influence of reaction time, dosage of TEPA, and solvent was also examined to control the shape and particle size. Results of this work indicate that these reaction parameters have important impact on the control of shape and grain size of the zirconia. To characterize the as-synthesized nanostructures, techniques such as X-ray diffraction (XRD), ultraviolet-visible (UV-vis) spectroscopy, energy dispersive X-ray microanalysis (EDX), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and photoluminescence (PL) spectroscopy were applied. In addition, the formation mechanism of zirconia nanostructures was discussed. IntroductionThe nanomaterials have attracted extraordinary research interest due to their unique and advantageous applications in different fields.1,2 One of the nanometerscale oxides is zirconium dioxide. It is reported that zirconia is an important metal oxide because of its unique electrical and optical characteristics 3-5 and also potential usages, including preparation of the transparent optical devices and production of the electrochemical capacitor electrodes, 6 fabrication of fuel cells, 7 and catalysts. 8,9 Zirconia has monoclinic, tetragonal, and cubic crystal forms that are stable at below 1175°C, 1175-2370°C, and 2370-2680°C temperature ranges, respectively.10 So far, various routes have been presented to prepare zirconium dioxide, such as hydrothermal, 11 microwave irradiation, 12 sol-gel, 13 thermal decomposition, 14 precipitation, 15,16 and sonochemical. 17,18 The development of a simple and reproducible approach for preparing nanostructured zirconia is of great importance to the potential investigations of its properties. It has been shown that the particle size and shape of nanomaterials have a great impact on their characteristics. [19][20][21][22][23][24][25] So, exploring suitable methods to prepare zirconia and controlling its morphology and particle size is important and necessary. Herein, the precipitation route is presented to synthesize zirconia nanostructures. Precipitation route is well-known as an appropriate preparation approach for production of various nanomaterials. This route is known as facile, reproducible, and useful preparation approach and presents an advantageous way to the preparation of homogeneous nanostructures. This work is the first successful attempt for the preparation of zirconium dioxide nanostructures using tetraethylenepentamine (TEPA) as precipitator. To go further into the study, the influence of dosage of TEPA, reaction time, and solvent on the shape and particle size of zirconia is examined. ExperimentalZirconium (IV) oxynitrate hydrate (ZN), tetraethylenepentamine (TEPA), ethylenediamine (EN), ethylene glycol (EG), propylene glycol (PG), and meth...

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Section: Resultsmentioning

confidence: 87%

Zirconia Nanostructures: Novel Facile Surfactant‐Free Preparation and Characterization

Zinatloo-Ajabshir

Salavati‐Niasari

2015

Int J Applied Ceramic Tech

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“…The specimen was transferred into a sealed Teflon container fitted in stainless steel bomb and statically heated in hydrothermal reactor at 120°C for 48 hrs [10]. The white product obtained was washed initially by dilute HCl (Fisher Scientific), also several times with distilled water and this nano ZrO 2 was dispersed in acetonitrile and kept for ultrasonication to make a uniform dispersion ( Fig.…”

Section: Preparation Of Zro 2 Nanoparticles By Hydrothermal Methodsmentioning

confidence: 99%

Current voltage analysis and band diagram of Ti/TiO2 nanotubes Schottky junction

et al. 2012

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Here, we report on how the energy band diagram of a nanostructured semiconductor-metal interface aligns in accordance with semiconductor morphology. Electrochemically, titanium metal is anodized to form titanium dioxide nanotubes, which forms a junction with the free Ti substrate and this junction forms a natural Schottky barrier. With reduced dimensionality of the nanotube structures (lower wall thickness), we have observed band edge movements and band gap quantum confinement effects and lowering of the Schottky barrier. These results were corroborated with the help of cyclic voltammetry, ultraviolet-visible spectrometry, and impedance analysis. Current voltage analysis of the Schottky barrier showed a lowering of the barrier (by 25 %) with reducing dimensionality of the nanotube structures. At externally applied voltages higher than the Schottky barrier, charges can travel along the nanotubes and reside at an interface between the nanotubes and a high-κ dielectric. This property was utilized to develop high surface area solid-state capacitors.

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“…Carter et al, 2009), sol-gel (Diaz-Parralejo et al, 2001Heshmatpour & Aghakhanpour, 2011), hydrothermal synthesis also supported by microwave radiation Kanade et al, 2008). The hydrothermal method (hydrolysis) to produce ZrO 2 -based nanocrystalline powders was first used in 1990.…”

Section: Ceramic Fabricationmentioning

confidence: 99%

Application of Zirconia in Dentistry: Biological, Mechanical and Optical Considerations

Volpato¹,

Garbelotto²,

Fredel³

et al. 2011

Advances in Ceramics - Electric and Magnetic Ceramics, Bioceramics, Ceramics and Environment

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Synthesis and characterization of nanocrystallined zirconia by hydrothermal method

Cited by 76 publications

References 24 publications

Zirconia Nanostructures: Novel Facile Surfactant‐Free Preparation and Characterization

Zirconia Nanostructures: Novel Facile Surfactant‐Free Preparation and Characterization

Current voltage analysis and band diagram of Ti/TiO2 nanotubes Schottky junction

Application of Zirconia in Dentistry: Biological, Mechanical and Optical Considerations

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