Synthesis, Characterization, and Applications of Europium Oxide: A Review

Kumar, Sandeep; Prakash, Ram; Singh, V. B.

doi:10.1166/rase.2015.1102

Cited by 32 publications

(25 citation statements)

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“…Fig. 4a)[27]. These energy peaks confirms the presence of Eu (III) in synthesized nanocomposites.Zinc exhibited two sharp peaks at 1024 eV and 1043 eV binding energies which were assignable to Zn-2p 3/2 and Zn-2p 1/2 in Zn 2+ state of ZnO and shown in Fig.…”

supporting

confidence: 61%

Synthesis of Eu3+−doped ZnO/Bi2O3 heterojunction photocatalyst on graphene oxide sheets for visible light-assisted degradation of 2,4-dimethyl phenol and bacteria killing

Shandilya

Sudhaik

Raizada

et al. 2020

Solid State Sciences

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We reported the immobilization of binary heterojunction Eu 3+-ZnO/Bi 2 O 3 over the surface of graphene oxide (GO) sheets by precipitation method to compose a visible light drive photocatalyst. The ternary nanocomposites were characterized by different spectral technique like FESEM, FTIR, XRD, XPS, EDX, HRTEM, UV-visible, PL, HPLC and LCMS analysis. The high specific surface area of 106.0 m 2 g-1 of Eu 3+-ZnO/Bi 2 O 3 /GO nanocomposites was ascertained by BET adsorptiondesorption isotherm. The nano-composite exhibit excellent photo-efficiency for the photodegradation of 2, 4-dimethyl phenol (DMP) under visible region and was almost completely mineralized in 100 min as compared to the bare and binary system. The mineralized products of DMP were analyzed by HPLC and LCMS analysis. The kinetic model suggests the degradation pathway obeys pseudo-first order kinetic. Their antibacterial property were assessed against E. coli bacteria and nearly 90% of gram negative bacteria were killed by using ternary photocatalyst as determined by CFU method. Also, Eu 3+-ZnO/Bi 2 O 3 /GO nanocomposites possessed significant recycle efficiency up to six consecutive cycles which is beneficial to minimize the tariff. The improved photo-efficiency is due to the extension towards visible region, increase surface area, and high charge separation in ternary heterojunction.

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confidence: 61%

Synthesis of Eu3+−doped ZnO/Bi2O3 heterojunction photocatalyst on graphene oxide sheets for visible light-assisted degradation of 2,4-dimethyl phenol and bacteria killing

Shandilya

Sudhaik

Raizada

et al. 2020

Solid State Sciences

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“…Indeed, HR-XPS analysis demonstrate that the phase minerals bound to the cell surface of T. scotoductus SA-01 were Eu 2 (CO 3 ) 3 . However, a significant drawback to this technique is that it only provides information with regards to surface binding of Eu (Kumar et al, 2015). Usually, reduction of metals leads to intracellular bioaccumulation as it was observed in bacterium Paracoccus denitrificans interaction with Cu (Su et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Biomineralization and Bioaccumulation of Europium by a Thermophilic Metal Resistant Bacterium

et al. 2019

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Rare earth metals are widely used in the production of many modern technologies. However, there is concern that supply cannot meet the growing demand in the near future. The extraction from low-grade sources such as geothermal fluids could contribute to address the increasing demand for these compounds. Here we investigated the interaction and eventual bioaccumulation of europium (Eu) by a thermophilic bacterium, Thermus scotoductus SA-01. We demonstrated that this bacterial strain can survive in high levels (up to 1 mM) of Eu, which is hundred times higher than typical concentrations found in the environment. Furthermore, Eu seems to stimulate the growth of T. scotoductus SA-01 at low (0.01–0.1 mM) concentrations. We also found, using TEM-EDX analysis, that the bacterium can accumulate Eu both intracellularly and extracellularly. FT-IR results confirmed that carbonyl and carboxyl groups were involved in the biosorption of Eu. Infrared and HR-XPS analysis demonstrated that Eu can be biomineralized by T. scotoductus SA-01 as Eu2(CO3)3. This suggests that T. scotoductus SA-01 can potentially be used for the biorecovery of rare earth metals from geothermal fluids.

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“…At room temperature, most of Eu 2 O 3 is cubic with a small portion of monoclinic crystalline structure. [ 28 ] The Eu‐Eu distance is 4.2 Å in cubic crystal, but is only 3.6 Å in monoclinic crystal. [ 29 ] Therefore, the Eu‐Eu cross relaxation is much faster in the monoclinic crystal, and results in a shorter emission lifetime of 5 D 1 .…”

Section: Resultsmentioning

confidence: 99%

Emission spectra from the ⁵D₁ excited state of the compounds containing Eu³⁺

Wang

Song

Lii

et al. 2021

J Chinese Chemical Soc

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Excitation, photoluminescence, and time‐resolved emission spectra of the Eu3+‐containing compounds, YxEu2‐x(CHDC)3, Eu(NO3)3·5H2O, and Eu2O3 were obtained. The coordination polymers, R2(C8H10O4)3, (R = Eu or Y), were synthesized by mid‐temperature hydrothermal technique with the 1,4‐cyclohexanedicarboxylate (C8H10O4, CHDC) ligands. Blue‐shift emission signals were observed in the emission spectra of these Eu3+‐containing compounds at 561 nm excitation. Power dependence and temperature dependence experiments indicate the blue‐shift emission results from one‐photon hot band transition to the 5D1 excited state. The Eu3+ 5D1→7FJ emission decay curves and 5D0→7FJ emission rising curves of these compounds were acquired. The 5D1 state emission lifetimes are quite different in these compounds and are correlated with the 5D1 → 5D0 relaxation rates. Our analysis shows two possible (Eu3+‐Eu3+ and Eu3+‐CHDC) cross‐relaxation processes that relax 5D1 to 5D0 with different rates in these compounds.

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Synthesis, Characterization, and Applications of Europium Oxide: A Review

Cited by 32 publications

References 0 publications

Synthesis of Eu3+−doped ZnO/Bi2O3 heterojunction photocatalyst on graphene oxide sheets for visible light-assisted degradation of 2,4-dimethyl phenol and bacteria killing

Synthesis of Eu3+−doped ZnO/Bi2O3 heterojunction photocatalyst on graphene oxide sheets for visible light-assisted degradation of 2,4-dimethyl phenol and bacteria killing

Biomineralization and Bioaccumulation of Europium by a Thermophilic Metal Resistant Bacterium

Emission spectra from the ⁵D₁ excited state of the compounds containing Eu³⁺

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Synthesis, Characterization, and Applications of Europium Oxide: A Review

Cited by 32 publications

References 0 publications

Synthesis of Eu3+−doped ZnO/Bi2O3 heterojunction photocatalyst on graphene oxide sheets for visible light-assisted degradation of 2,4-dimethyl phenol and bacteria killing

Synthesis of Eu3+−doped ZnO/Bi2O3 heterojunction photocatalyst on graphene oxide sheets for visible light-assisted degradation of 2,4-dimethyl phenol and bacteria killing

Biomineralization and Bioaccumulation of Europium by a Thermophilic Metal Resistant Bacterium

Emission spectra from the 5D1 excited state of the compounds containing Eu3+

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Emission spectra from the ⁵D₁ excited state of the compounds containing Eu³⁺