Rare earth ions doped ZnO: Synthesis, characterization and preliminary photoactivity assessment

Cerrato, Erik; Gionco, Chiara; Berruti, Ilaria; Sordello, Fabrizio; Calza, Paola; Paganini, Maria Cristina

doi:10.1016/j.jssc.2018.05.001

Cited by 87 publications

(41 citation statements)

References 36 publications

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“…The product was centrifuged and washed with deionized water, then dried at 70°C. The doped ZnO samples with rare earth elements RE 1% molar were prepared adding the stoichiometric amount of RE chlorides in the starting solution, then the same procedure described in [14] has been followed. The samples will be labelled as ZnO, ZnO-Ce, ZnO-La, ZnO-Yb, ZnO-Pr and ZnO-Er.…”

Section: Methodsmentioning

confidence: 99%

“…We synthesized via hydrothermal process and characterized different photocatalysts based on ZnO doped with a low amount of RE (1% molar). [14][15][16][17][18] In the present paper, we tested their photocatalytic performances toward a model pollutant, phenol, in different matrices, namely MilliQ water and wastewater, to assess if the higher activity is still maintained when facing with very complex and challenging matrices. Furthermore, through a comprehensive electrochemical investigation and statistical analysis we were able to correlate the improved activity with the different parameters affecting the photocatalytic process.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic performances of rare earth element-doped zinc oxide toward pollutant abatement in water and wastewater

Sordello

Berruti

Gionco

et al. 2019

Applied Catalysis B: Environmental

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The photocatalytic performance of pristine and rare earth elements (La, Ce, Pr, Er, Yb) doped zinc oxide was tested toward the abatement of a model pollutant in MilliQ water and wastewater matrices. ZnO doped with Ce, Er and particularly with Yb exhibited photoactivity higher than bare zinc oxide and the benchmark TiO 2 P25, especially in wastewater matrix. Several electrochemical investigations were performed via chronopotentiometry and cyclic voltammetry aimed to shed light on the reasons why the diverse materials behaved differently. From the overall data a complex picture emerged, where there is not a single property of the materials evidently outperforming the others. Nonetheless, from the analysis of whole data a limited role of doping emerged for La and Pr, doping with Er improved the photocurrent, doping with Yb favoured a better accumulation of photoelectrons, and doping with Ce promoted a faster electron transfer.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photocatalytic performances of rare earth element-doped zinc oxide toward pollutant abatement in water and wastewater

Sordello

Berruti

Gionco

et al. 2019

Applied Catalysis B: Environmental

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“…ZnO has been fabricated in different shapes and by different techniques. It was succeeded to be fabricated as platelets, clusters consisting of nano-crystals, nano wires and thin films as well [20][21][22][23][24][25]. Thin films are more practical and economical for different applications.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the optical and physical properties of La doped ZnO nanostructured thin films

Ahmed

Tawfik

Elfayoumi

et al. 2019

Journal of Alloys and Compounds

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The modification and tailoring the characteristics of nanostructured materials are of great interest due to controllable and unusual inherent properties in such materials. A simple spray pyrolysis technique is used to prepare pure and La-doped ZnO films. The influence of La concentration (0, 0.33, 0.45, 0.66, 0.92 and 1.04 at. %) on the structural, optical, and magnetic properties of ZnO was investigated. The exact nominal compositions of the prepared films were determined from the field emission scanning electron microscope occupied with EDX. X-ray diffraction confirmed that the samples possessed single-phase hexagonal wurtzite structure. The main crystal size was decreased from 315.50 Å to 229.04 Å depending on La dopant concentration. This decrease is due to the small ionic radius of Zn ions in compared to La ions.The band gap values were found to be depend strongly on La 3+ ion content. Introducing La into ZnO induces a clear magnetic moment without any distortion in the geometrical symmetry, it 2 also reveals the ferromagnetic coupling. The saturation magnetic moment of 1.04 at% La-doped ZnO shows the highest value of 0.014 emu, which is ~23 times higher than pure ZnO sample.The obtained results were discussed and compared with other literature data and showed an acceptable agreement.

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“…Orthophosphates have charge stability, excellent thermal stability, high chemical stability, and other excellent properties, so they have become important matrix materials. Great attention has been paid to Eu 3+ ‐doped phosphates and many investigations on these materials have been carried out . For example, Zhang et al .…”

Section: Introductionmentioning

confidence: 99%

“…how to produce red emission intensity ( 5 D 0 → 7 F 2 ) from UV and visible light excitation radiation. Reports describing LaPO 4 :Eu 3+ and La 3 PO 7 :Eu 3+ phosphors are common, however reports describing 6LaPO 4 –3La 3 PO 7 –2La 7 P 3 O 18 :Eu 3+ phosphors are not. In the present study, 6LaPO 4 –3La 3 PO 7 –2La 7 P 3 O 18 :Eu 3+ novel phosphors were synthesized successfully using co‐deposition and high‐temperature solid‐state reactions and these materials were investigated in detail.…”

Section: Introductionmentioning

confidence: 99%

Luminescence properties of a novel red phosphor 6LaPO₄–3La₃PO₇–2La₇P₃O₁₈:Eu³⁺

Wang

2019

Luminescence

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Eu 3+ -doped 6LaPO 4 -3La 3 PO 7 -2La 7 P 3 O 18 red luminescent phosphors were synthesized by co-deposition and high-temperature solid-state methods and its polyphase state was confirmed by X-ray diffraction analysis. Transmission electron microscopy showed the grain morphology as a mixture of rods and spheres. Luminescence properties of the phosphor were investigated and its red emission parameters were evaluated as a function of Eu 3+ concentration (3.00-6.00 mol%). Excitation spectra of 6LaPO 4 -3La 3 PO 7 -2La 7 P 3 O 18 :Eu 3+ showed strong absorption bands at 280, 395, and 466 nm, while the luminescence spectra exhibited prominent red emission peak centred at 615 nm ( 5 D 0 → 7 F 2 ) in the red region. CIE chromaticity coordinates of the 6LaPO 4 -3La 3 PO 7 -2La 7 P 3 O 18 :5%Eu 3+ phosphor were (0.668, 0.313) in the red region, and defined its potential application as a red phosphor.

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Rare earth ions doped ZnO: Synthesis, characterization and preliminary photoactivity assessment

Cited by 87 publications

References 36 publications

Photocatalytic performances of rare earth element-doped zinc oxide toward pollutant abatement in water and wastewater

Photocatalytic performances of rare earth element-doped zinc oxide toward pollutant abatement in water and wastewater

Tailoring the optical and physical properties of La doped ZnO nanostructured thin films

Luminescence properties of a novel red phosphor 6LaPO₄–3La₃PO₇–2La₇P₃O₁₈:Eu³⁺

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Rare earth ions doped ZnO: Synthesis, characterization and preliminary photoactivity assessment

Cited by 87 publications

References 36 publications

Photocatalytic performances of rare earth element-doped zinc oxide toward pollutant abatement in water and wastewater

Photocatalytic performances of rare earth element-doped zinc oxide toward pollutant abatement in water and wastewater

Tailoring the optical and physical properties of La doped ZnO nanostructured thin films

Luminescence properties of a novel red phosphor 6LaPO4–3La3PO7–2La7P3O18:Eu3+

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Luminescence properties of a novel red phosphor 6LaPO₄–3La₃PO₇–2La₇P₃O₁₈:Eu³⁺