Zirconia films formed by plasma electrolytic oxidation: Photoluminescent and photocatalytic properties

Stojadinović, Stevan; Vasilić, Rastko; Radić, Nenad; Grbić, Boško

doi:10.1016/j.optmat.2014.11.041

Cited by 40 publications

(16 citation statements)

References 33 publications

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“…The absorption wavelength shifts of the ZrO 2 are determined about 375 nm, so the ZrO 2 is absorbed in the UV light region. The bandgap energy (E g ) of ZrO 2 is identified as being about 3.300 eV, which is much lower than previous studies of about 3.670-5.850 eV [27,[36][37][38][39][40][41][42].…”

Section: Characterization Of Obtained Zrocontrasting

confidence: 67%

Purification and Characterization of High Purity Nano Zirconia by Liquid-Liquid Extraction Using D2EHPA/p-Xylenes

et al. 2022

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In this paper, Zr(IV) nitrate solution decomposed from Viet Nam zircon concentrate was the source of zirconium extraction by liquid-liquid extraction (L.L.E). The FT-IR and UV-Vis spectra confirmed the extraction of Zr(IV) by D2EHPA/p-xylenes. There were four stages for the purification of impurities from the Zr matrix. First, the extraction of elements in 3.0 M HNO3 by 50% D2EHPA/p-xylenes was conducted. Second, two scrubbing cycles of impurities using 6.0 M HNO3, 76.5% of the total amount of Zr(IV) were retained in the organic phase, and 23.5% remained in the aqueous phase. Third, the stripping of a macro amount of zirconium from loaded D2EHPA has been effectively carried out using 1.5 M H2SO4 with a stripping efficiency of 99.6%. Fourth, concentrated ammonia was added to the solution Zr(IV) after stripping extraction to form precipitate for calcination at 550 °C for the final products. The refined products were characterized by X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), EDS, XRF, and diffuse reflectance spectroscopy. The ZrO2 has high purity, is nanospherical, and has a uniform sphere-like morphology with small grain size of less than 30 nm and a bandgap value of about 3.30 eV.

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Section: Characterization Of Obtained Zrocontrasting

confidence: 67%

Purification and Characterization of High Purity Nano Zirconia by Liquid-Liquid Extraction Using D2EHPA/p-Xylenes

et al. 2022

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“…[35] Emissions at 440 and 465 nm it should be due to contribution of midgap trap states, such as oxygen vacancies and surface defects. [20,36] In the literature on this subject, PL emission spectra for undoped ZrO 2 , very analogous to the one presented here, are reported. [37,38] 3.6.…”

Section: Pl For Zro 2 Nanopowderssupporting

confidence: 59%

“…The control of nanoparticles size allows to modify their crystalline structure and morphology, which directly affects their electrical and optical properties. [12][13][14] ZrO 2 and ZrO 2 :RE 3þ materials have been synthesized through several routes, such as sol-gel, [1] coprecipitation process, [15] spray pyrolysis, [16] solution combustion method, [17] solvothermal synthesis, [18] polyol, [19] and plasma electrolytic oxidation, [20] among others. The polyol method, initially developed for preparation of metallic nanoparticles, has also been used for synthesis of nanopowders as oxides, phosphates, or sulfides with very satisfactory results.…”

Section: Introductionmentioning

confidence: 99%

Luminescence from ZrO₂ Nanopowders Doped with Sm³⁺ Ions Processed by Polyol Method at Low Processing Temperature

Martínez-Martínez

Juárez-López

Garcia

et al. 2021

Physica Status Solidi (a)

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ZrO2 and ZrO2:Sm3+ nanopowders are synthesized by means of polyol method, from [Zr(NO3)2.xH2O] and (SmCl3·6H2O) precursors dissolved in a diethylene glycol medium. X‐ray diffraction (XRD) results show polymorphic powders because monoclinic structure and tetragonal are exhibited. The crystal size is estimated by Scherrer formula; an averaged crystallite size of 9 nm is obtained. Surface morphology study, by means of SEM, evidences multiform particles, some with straight edges associated with monoclinic or tetragonal structure. The chemical composition microanalysis results indicate agreement with ideal stoichiometry for ZrO2 and ZrO2:Sm3+ powders. The photoluminescence emission spectra show that maximum intensity is reached at λ = 614 nm due to transition 4G5/2→6H7/2, exciting with λex = 240 nm, which corresponds to sample ZrO2:Sm3+ (0.75 at%); this sample is labeled as M3. Very similar results are obtained by cathodoluminescence studies. On the contrary, exciting with λex = 380 nm (monitoring emission band peaked at 614 nm), emission bands of host lattice and ZrO2:Sm3+ are favored simultaneously. The luminescent quenching phenomenon occurs when doping concentration (Sm3+ ions) is >=0.75 at%. The photoluminescent emission exhibits a reddish orange color, characteristic of Sm3+ ions, and yellowish‐orange for cathodoluminescence emission.

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“…It has exceptional physical, optical, dielectric, chemical, mechanical, and thermal properties such as; excellent transparency in visible and adjacent infrared region, good refractive index, large optical band gap, low optical loss, high dielectric constant, good chemical stability, excellent wear resistance, elevated melting point, and high resistance to thermal shock. ZrO 2 addition in polymeric materials enhances mechanical and thermal stability especially hardness of GFRPCs …”

Section: Introductionmentioning

confidence: 99%

“…ZrO 2 addition in polymeric materials enhances mechanical and thermal stability especially hardness of GFRPCs. 17,18 FRPCs are anisotropic and have structural heterogeneity with unavoidable internal manufacturing defects, such as porosity, brittle failure and high deformability, misalignment of fibers or bad stack of the prepreg layers of laminated composites. 19 These defects lead to mechanical and thermal instability of resultant composites and do not permit complete exploitation of the material's strength.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of novel zirconia filled glass fiber reinforced polyester hybrid composites

Munawar

Khan

Gull

et al. 2016

J of Applied Polymer Sci

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Novel hybrid glass fiber reinforced polyester composites (GFRPCs) filled with 1-5 wt % microsized zirconia (ZrO 2 ) particles, were fabricated by hand lay-up process followed by compression molding and evaluated their physical, mechanical and thermal behaviors. The consumption of styrene in cured GFRPCs was confirmed by Fourier transform infrared spectroscopy. The potential implementation of ZrO 2 particles lessened the void contents marginally and substantially enhanced the mechanical and thermal properties in the resultant hybrid composites. The GFRPCs filled with 4 wt % ZrO 2 illustrated noteworthy improvement in tensile strength (66.672 MPa) and flexural strength (67.890 MPa) while with 5 wt % ZrO 2 showed 63.93% rise in hardness, respectively, as compared to unfilled GFRPCs. Physical nature of polyester matrix for composites and an improved glass transition temperature (T g ) from 103 to 112 8C was perceived by differential scanning calorimetry thermograms. Thermogravimetric analysis revealed that the thermal stability of GFRPCs was remarkably augmented with the addition of ZrO 2 .

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Zirconia films formed by plasma electrolytic oxidation: Photoluminescent and photocatalytic properties

Cited by 40 publications

References 33 publications

Purification and Characterization of High Purity Nano Zirconia by Liquid-Liquid Extraction Using D2EHPA/p-Xylenes

Purification and Characterization of High Purity Nano Zirconia by Liquid-Liquid Extraction Using D2EHPA/p-Xylenes

Luminescence from ZrO₂ Nanopowders Doped with Sm³⁺ Ions Processed by Polyol Method at Low Processing Temperature

Fabrication and characterization of novel zirconia filled glass fiber reinforced polyester hybrid composites

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Zirconia films formed by plasma electrolytic oxidation: Photoluminescent and photocatalytic properties

Cited by 40 publications

References 33 publications

Purification and Characterization of High Purity Nano Zirconia by Liquid-Liquid Extraction Using D2EHPA/p-Xylenes

Purification and Characterization of High Purity Nano Zirconia by Liquid-Liquid Extraction Using D2EHPA/p-Xylenes

Luminescence from ZrO2 Nanopowders Doped with Sm3+ Ions Processed by Polyol Method at Low Processing Temperature

Fabrication and characterization of novel zirconia filled glass fiber reinforced polyester hybrid composites

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Luminescence from ZrO₂ Nanopowders Doped with Sm³⁺ Ions Processed by Polyol Method at Low Processing Temperature