New insights into structural and magnetic properties of Ce doped ZnO nanoparticles

Fifere, Nicuşor; Airinei, Anton; Ţîmpu, Daniel; Rotaru, Aurelian; Săcărescu, Liviu; Ursu, Laura

doi:10.1016/j.jallcom.2018.05.031

Cited by 100 publications

(37 citation statements)

References 50 publications

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“…Yet another reason for an enhancement in the band gap in the present samples could be due to the presence of microstrain in crystal lattice confirmed by XRD results (Figure 2) originating from slight difference that exists between the ionic radius of Yb 3+ and Y 3+ apart from the defect states arising out of prevalence of oxygen vacancies. The decrease in band gap 3.60 eV for (x = 0.14) is due to grain‐boundary defect of addition of Yb atoms in Y 2 O 3 lattice which creates a new unoccupied states in the band gap which might be populated by electrons comes from the valance band 46 . Furthermore, it is a well‐known effect that small particle sizes tend to exhibit increased band gaps 47,48 .…”

Section: Resultsmentioning

confidence: 99%

“…The decrease in band gap 3.60 eV for (x = 0.14) is due to grain-boundary defect of addition of Yb atoms in Y 2 O 3 lattice which creates a new unoccupied states in the band gap which might be populated by electrons comes from the valance band. 46 Furthermore, it is a well-known effect that small particle sizes tend to exhibit increased band gaps. 47,48 This effect allows to influences the color, photocatalytic action and luminescent activities of the samples during the transition from micro level scale to nanoparticles level.…”

Section: Uv-vis Propertiesmentioning

confidence: 99%

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Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

Kumar

Tripathi

Sharma

et al. 2020

Int J Applied Ceramic Tech

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Ceramics are inorganic materials which are mostly crystalline oxides. The crystallinity of the ceramics differs from highly oriented crystalline to a semi-crystalline structure. Due to its varying crystallinity and electron composition in the ionic as well as covalent bonds the ceramics are able to exhibit different thermal, structural, optical, and electrical properties. Polycrystalline ceramics are used for various applications such as solid-state lasers, light-emitting diodes, infrared detectors, temperature sensors, solar cells. The precise dopant concentration in ceramics with rare-earth elements makes ceramics useful for luminescent and high-temperature applications such as lasing action and medical display devices. 1,2 Y 2 O 3 is considered the most important multifunctional material due to its potential application prospects. Y 2 O 3 has

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Section: Resultsmentioning

confidence: 99%

Section: Uv-vis Propertiesmentioning

confidence: 99%

Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

Kumar

Tripathi

Sharma

et al. 2020

Int J Applied Ceramic Tech

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“…The Raman spectrum of ZnO-Ce is shown in Figure 3 a. ZnO-Ce exhibited an intense absorption band centered at 438 cm −1 (E2H), which is attributed to the main vibration mode of the ZnO phase with a hexagonal wurtzite structure [ 40 ], indicating good crystallization and a defined peak. Additional bands are found at 332 cm −1 , 382 cm −1 , 538 cm −1 , 584 cm −1 , and 677 cm −1 , also related to active polar modes in Raman attributed to polar modes in ZnO [ 40 ]. The peak at 332 cm −1 is attributed to second-order Raman scattering, coming from the phonon limit zone 3E2H-E2L, while the peak at 382 cm −1 can be attributed to the A1T mode [ 40 ].…”

Section: Resultsmentioning

confidence: 99%

“…Additional bands are found at 332 cm −1 , 382 cm −1 , 538 cm −1 , 584 cm −1 , and 677 cm −1 , also related to active polar modes in Raman attributed to polar modes in ZnO [ 40 ]. The peak at 332 cm −1 is attributed to second-order Raman scattering, coming from the phonon limit zone 3E2H-E2L, while the peak at 382 cm −1 can be attributed to the A1T mode [ 40 ]. There is a weak band around 584 cm −1 (phonon E1L), which may be related to the formation of different defects, such as oxygen vacancies and interstitial Zn [ 41 , 42 ].…”

Section: Resultsmentioning

confidence: 99%

A Brief Photocatalytic Study of ZnO Containing Cerium towards Ibuprofen Degradation

et al. 2021

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Ibuprofen (IBU) is one of the most-sold anti-inflammatory drugs in the world, and its residues can reach aquatic systems, causing serious health and environmental problems. Strategies are used to improve the photocatalytic activity of zinc oxide (ZnO), and thosethat involvethe inclusion of metalhave received special attention. The aim of this work was to investigate the influence of the parameters and toxicity of a photoproduct using zinc oxide that contains cerium (ZnO-Ce) for the photodegradation of ibuprofen. The parameters include the influence of the photocatalyst concentration (0.5, 0.5, and 1.5 g L−1) as well as the effects of pH (3, 7, and 10), the effect of H2O2, and radical scavengers. The photocatalyst was characterized by Scanning Electron Microscopy-Energy Dispersive Spectroscopy, Transmission electron microscopy, Raman, X-Ray Diffraction, surface area, and diffuse reflectance. The photocatalytic activity of ibuprofen was evaluated in an aqueous solution under UV light for 120 min. The structural characterization by XRD and SEM elucidated the fact that the nanoparticle ZnO contained cerium. The band gap value was 3.31 eV. The best experimental conditions for the photodegradation of IBU were 60% obtained in an acidic condition using 0.50 g L−1 of ZnO-Ce in a solution of 20 ppm of IBU. The presence of hydrogen peroxide favored the photocatalysis process. ZnO-Ce exhibited good IBU degradation activity even after three photocatalytic cycles under UV light. The hole plays akey role in the degradation process of ibuprofen. The toxicity of photolyzed products was monitored against Artemia salina (bioindicator) and did not generate toxic metabolites. Therefore, this work provides a strategic design to improve ZnO-Ce photocatalysts for environmental remediation.

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“…Thus, the photocatalytic stability would be remarkably improved. In addition, the ground state and the excited state energy of Ce can mediate the large band gap of ZnO, which would broaden the absorption of thevisible light by this Ce‐doped ZnO composite nanomaterials …”

Section: Introductionmentioning

confidence: 99%

Polyionic Liquids (PIL) Promoted Ce Doped ZnO for the Photocatalytic Degradation of Rhodamine B (RhB)

Cao

Huang

et al. 2019

ChemistrySelect

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In this study, an efficient one-pot method was developed to synthesize Ce-doped ZnO photocatalysts in the polyionic liquids. The synthesized samples have better photocatalytic degradation activity than pure ZnO. The excellent catalytic performance may be due to the fact that the doping of Ce increased the surface dispersion of the ZnO nanoparticles, and the addition of the polyionic liquids further enhanced the dispersion.And the addition of polyionic liquids increased the dispersion of ZnO particles and doped Ce centers, which greatly limits the photogenerated electron-hole recombination, thereby increasing the photocatalytic degradation activity of the material.

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New insights into structural and magnetic properties of Ce doped ZnO nanoparticles

Cited by 100 publications

References 50 publications

Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

A Brief Photocatalytic Study of ZnO Containing Cerium towards Ibuprofen Degradation

Polyionic Liquids (PIL) Promoted Ce Doped ZnO for the Photocatalytic Degradation of Rhodamine B (RhB)

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New insights into structural and magnetic properties of Ce doped ZnO nanoparticles

Cited by 100 publications

References 50 publications

Structural, morphological, and opto‐electrical properties of Y2‐xYbxO3nanoparticles synthesized using co‐precipitation method

Structural, morphological, and opto‐electrical properties of Y2‐xYbxO3nanoparticles synthesized using co‐precipitation method

A Brief Photocatalytic Study of ZnO Containing Cerium towards Ibuprofen Degradation

Polyionic Liquids (PIL) Promoted Ce Doped ZnO for the Photocatalytic Degradation of Rhodamine B (RhB)

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Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method