Showing papers in "Journal of Rare Earths in 2018"

TL;DR: In this paper, a sensitive and selective electrochemical device based on a graphite screen printed electrode modified with Dy2(WO4)3 nanoparticles (DWO/SPE) was developed for the analysis of epinephrine in samples also containing acetylcholine.

TL;DR: In this paper, the structural and magnetic properties of Dy-substituted Mn Zn ferrite nanoparticles were characterized through X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM), and Curie temperature.

TL;DR: In this article, the effect of doping concentration, excitation wavelength and excitation mechanism on asymmetry ratio was systematically studied using Y3Al5O12:Eu3+, YVO4: Eu3+ and Y2O3:Enu3+ nanophosphors.

TL;DR: In this paper, the physical, optical and structural properties of magnesium borate glasses doped with varied concentrations of Dy2O3 were examined, and the photoluminescence spectra of all glasses were synthesized by melt quenching method and characterized at room temperature using several analytical techniques.

TL;DR: In this paper, a tri-doped Fe-Gd-P tri-decoupled TiO2 nanoparticles were synthesized by a modified sol-gel method, and the photocatalytic activities of prepared samples were evaluated by photo degradation of methyl orange (MO) and 4-chlorophenol (4-CP) as model pollutants under visible light irradiation.

TL;DR: In this paper, a novel orange-red emitting Ba3Y4O9:Sm3+ phosphors were prepared by a high temperature solid-state reaction in air, and the results showed that the excitation spectrum includes a series of linear peaks at 350, 367, 382, 410, 424, 445, 470 and 495-nm, respectively.

TL;DR: In this article, rare earth-doped copper nanoferrites were identified through the Fourier transform infrared spectra and the effect of rare earth ion doping on the optical bandgap energy of the nanoferrite was investigated.

TL;DR: CeO2-500 NPs were synthesized in alkaline medium via the homogeneous precipitation method and were subsequently calcined at 80°C/24h (assigned as CeO 2-80) and 500°C /2

TL;DR: In this article, the metal oxides CuMnCe and CeY washcoats on cordierite were prepared using an impregnation method, and then used as support for the active Pt component to prepare the Pt/PtO and Pt/CeY monolithic catalysts for the deep oxidation of VOCs.

TL;DR: In this paper, the influence of temperature on the complex process of Bayan Obo rare earth (RE) ore flotation with a collector of naphthyl hydroxamic acid (LF8#) was investigated.

TL;DR: In this paper, Ca2SiO4:Dy3+ nanopowders (NPs) were fabricated via solution combustion route and the optimized sample was employed for the visualization of overlapped LFPs by the cost effective powder dusting method.

TL;DR: In this article, a novel ion imprinted cryogel which exhibits high affinity and selectivity towards Ce(III) ions in aqueous solutions and bastnasite ore samples was demonstrated.

TL;DR: In this paper, three dimensionally ordered macroporous (3DOM) Ce-based catalysts were successfully prepared via a surfactant-assisted colloidal crystal template (CCT) route.

TL;DR: In this paper, a magnetic composite Fe3O4/CeO2 (MC Fe /Ce) was synthesized via CeO2 covered onto the surface of Fe 3O4 by sol-precipitation method, which is characterized by FE-SEM, XRD, SEM-EDS and FT-IR spectrum.

TL;DR: In this paper, Nd3+ substituted spinel ferrites with formula MgxCd1−xNd0.03Fe1.97O4 were prepared by oxalate co-precipitation method using novel microwave sintering technique.

TL;DR: In this article, forsterite nanoparticles (FRST) were used for the removal of cerium ions (Ce3+) from synthetic wastewater using TEM analysis, and the results showed that significant uptake of Ce3+ ions can be obtained for all the selected concentrations (25−150mg/L) within 2-h of adsorbent-adsorbate interaction.

TL;DR: In this article, the effect of the presence of Ba or K promoters on the catalytic performance of Co/CeO2-supported Co catalysts was investigated and the results showed that the presence either of them significantly changes the properties of the Co/Co catalysts.

TL;DR: In this article, the microstructure and properties improvements of a commercial sintered NdFeB magnet after optimized additional heat treatment were investigated, and the coercivity was enhanced from 1399 to 1560 kA/m. This enhancement was explained in terms of the evolution of the grain boundary structure, and formation of continuous thin layers of Nd-rich phase is important for high coercivity.

TL;DR: In this article, a green long persistent luminescence (LPL) phosphor Ca3Ga4O9:Tb3+/Zn2+ was prepared.

TL;DR: The use of rare earth elements (scandium, yttrium, and the lanthanides) in catalysis in general has continued to increase over the past few decades as mentioned in this paper.

TL;DR: In this paper, the authors presented a comprehensive study on the extraction of rare earth ions (RE3+) from phosphate leach solution using emulsion liquid membrane (ELM) in concentrated nitric acid medium.

TL;DR: In this article, a superior Ce Ta Sb composite oxide catalyst, which was prepared using homogeneous precipitation method, exhibited excellent deNOx efficiency and nearly 100% N2 selectivity with broad operation temperature window and better resistance to higher space velocity, meanwhile strong resistance to H2O and SO2.

TL;DR: In this article, rare earth elements (REEs) were extracted from coal fly ash by using environmentally friendly method that successfully concentrated REEs from 312ppm in fly ash to 99.4% in the final product.

TL;DR: In this article, the authors investigated the sorption of lanthanum, cerium, and neodymium ions from the aqueous solutions of mixtures through adsorption on the biochar composites.

TL;DR: In this paper, the effect of the anion in the original rare earth element (REE) solution on the reversible ion exchange of Ce nitrate and Ce sulfate with the Dowex 50W X8 was investigated using attenuated total reflection infrared (ATR-IR) spectroscopy, continuous flow reactor studies coupled with inductively coupled plasmasopy (ICP-MS), and density functional theory.

TL;DR: In this paper, the upconversion luminescence of silver nanoparticles (AgNPs) coated NaYF4:Er3+/Yb3+ phosphor nano-particles was investigated.

TL;DR: In this article, the effect of alkali mechanical activation on the structural changes of waste phosphors was explored using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR).

TL;DR: In this paper, various fluxes blended Y2O3:Eu3+ (5 mol%) nanopowders (NPs) were successfully fabricated by solution combustion method.

TL;DR: In this article, the authors have shown that Pr2FeCrO6 perovskite exhibits room-temperature ferromagnetism with a Curie temperature of about 562 K and weak ferroelectricity.

TL;DR: In this article, a trivalent dysprosium (Dy3+) activated nanocrystalline yttrium vanadate (YVO4) phosphor was synthesized via co-precipitation method.