Na2BaMg（PO4）2： synthesis, crystal structure and europium photoluminescence properties

Na2BaMg(PO4)2 was synthesized and characterized by X-ray diffraction, differential thermal analysis (DTA), 31P NMR spectroscopy and photoluminescence measurements. This compound crystallized in the P3m...     

Luminescence properties of polymers containing europium complexes with 4-tert-butylbenzoic acid

The binary europium complex EuL3 (L=4-tert-butylbenzoate) and ternary europium complexes EuL3TTA0.1 (TTA=2-thenoyltrifluoroacetone), EuL3DBM0.5 (DBM=dibenzoylmethane) and EuL3phen0.5 (phen=1, 10-phenan...     

Hydrothermal synthesis and luminescent properties of GdVO4 : Eu3+ nanophosphors

Eu³⁺-doped GdVO₄ has been synthesised via hydrothermal method by altering the hydrothermal temperature, reaction time and surfactant. The microstructure and morphology information of the phosphors were investigated via the techniques of X-ray powder diffraction and scanning electronic microscopy, which show that the phosphors wear tetragonal phase and the products present various regular morphologies under different reaction conditions such as bulk and nanoparticle. Moreover, the morphologies of the products have been controlled by altering reaction temperature. In addition, the surfactant was also included to control the morphologies of the products and the phosphors present different morphologies. All the phosphors exhibit the characteristic fluorescence of Eu ion (⁵D₀ → ⁷F₂ and ⁵D₀ → ⁷F₂). The electric dipole transition ⁵D₀ → ⁷F₂ of Eu³⁺ is dominant indicating that most sites of Eu³⁺ ions in GdVO₄ have no inversion centre. Furthermore, we found that the reaction time and the morphologies have great influence on optical properties.     

Extraction Behavior of Am(III) and Eu(III) from Nitric Acid Medium in Tetraoctyldiglycolamide-Bis(2-Ethylhexyl)Phosphoric Acid Solution

The extraction behavior of Am(III) and Eu(III) in a solution of tetra-octyldiglycolamide (TODGA), bis(2-ethylhexyl)phosphoric acid (HDEHP), and n-dodecane (n-DD) was studied to understand the role of TODGA and HDEHP in the combined solvent system. The extraction behavior of these metal ions was compared with those observed in TODGA/n-DD and HDEHP/n-DD. The effect of various parameters such as concentrations of HNO₃, TODGA, and HDEHP on the distribution ratio of Am(III) and Eu(III) was studied. Synergistic extraction of both the metal ions observed at lower acidities (<2.0 M) was attributed to the involvement of TODGA and HDEHP for extraction. However, the extraction of Am(III) and Eu(III) in the combined solvent was comparable with that observed in TODGA at higher acidities. The slope analysis of the extraction data confirmed the involvement of both the extractants at all acidities investigated in the present study.     

Preparation and characterization of visible-light-driven europium doped mesoporous titania photocatalyst

Pure and different content europium(Eu) doped mesoporous titania were prepared by template method using Eu(NO3)3.6H2O andTi(OC4H9)4 as precursors and Pluronic P123 as template and characterized with X-ray diffraction(XRD),N2 adsorption-desorption measurements,and ultraviolet-visible diffuse absorption spectra.Their photocatalytic activities were studied by photodegradation phenol in water under visible light irradiation.The results showed that Eu doping restrained the growth of grain size and extended the p...     

Separation of Eu(Ⅲ) with supported dispersion liquid membrane system containing D2EHPA as carrier and HNO_3 solution as stripping solution

The Eu(III) separation in supported dispersion liquid membrane (SDLM),with polyvinylidene fluoride membrane (PVDF) as the support and dispersion solution containing HNO3 solution as the stripping solution and Di(2-ethylhexyl) phosphoric acid (D2EHPA) dis-solved in kerosene as the membrane solution,was studied.The effects of pH value,initial concentration of Eu(III) and different ionic strengths in the feed phase,volume ratio of membrane solution and stripping solution,concentration of HNO3 solution,concentr...     

Sr_3SiO_5：Eu~（2＋）荧光粉相形成的影响因素及发光特性

采用高温固相法制备Sr3SiO5：Eu2＋荧光粉,利用X射线衍射分析方法和光致光谱分析方法研究样品的物相组成、激发光谱和发射光谱。研究摩尔比n（Sr）/n（Si）、助熔剂BaF2质量、煅烧温度及Eu2＋掺量等对样品物相形成和发光性能的影响。结果表明最佳实验参数为：n（Sr）/n（Si）=3、BaF2为1%、煅烧温度为1...     

稀土离子掺杂锆酸钙纳米晶的制备及发光性质

采用溶胶–凝胶法在700℃和较短的煅烧时间下制备了钙钛矿结构的CaZrO3和不同浓度的Eu3＋、Dy3＋掺杂的CaZrO3纳米晶粉末,对合成产物的发光性质进行研究。结果表明：Eu3＋掺杂的CaZrO3样品在590～630 nm之间有强的橙红光发射,在Eu3＋掺量为5.0%（摩尔分数,下同）时发光强度达到最高值。Dy3＋...     

Effects of Gd~(3 ) on Luminescence Properties of Eu~(3 ) within Polymeric Structure in Aqueous Solutions

Ｉｎｒｅｃｅｎｔｙｅａｒｓ ,ｔｈｅｒｅｈａｓｂｅｅｎａｇｒｏｗｉｎｇｉｎｔｅｒｅｓｔｉｎｔｈｅｌｕｍｉｎｅｓｃｅｎｃｅｐｒｏｐｅｒｔｉｅｓｏｆｌａｎ ｔｈａｎｉｄｅｃｈｅｌａｔｅｓｂｅｃａｕｓｅｏｆｔｈｅｉｒｐｏｔｅｎｔｉａｌｃｈｅｍｉｃａｌａｎｄｂｉｏｌｏｇｉｃａｌａｐｐｌｉｃａｔｉｏｎｓｆｏｒｐｒｏｂｅｓａｎｄｌａｂｅｌｓ[1,2 ] .Ｅｕ3 ,Ｔｂ3 ａｎｄＳｍ3 ｈａｖｅｅｘｃｅｌｌｅｎｔｌｕｍｉｎｅｓｃｅｎｃｅｐｒｏｐｅｒｔｉｅｓ ,ｂｕｔｔｈｅｉｒａｂｓｏｒｐｔｉｏｎｂａｎｄｓａｒｅｗｅａｋａ…     

Encapsulation of Eu(TTA)3 into MCM-41 Mesoporous Molecular Sieve by Sol-Gel Method

Ｔｈｅｄｅｓｉｒａｂｌｅｌｕｍｉｎｅｓｃｅｎｃｅｃｈａｒａｃｔｅｒｉｓ ｔｉｃｓｏｆｓｏｍｅｌａｎｔｈａｎｉｄｅｉｏｎｓｂａｓｅｄｏｎｔｈｅｉｎｔｒａ ｆ ｏｒｂｉｔａｌｔｒａｎｓｉｔｉｏｎｓｈａｖｅｒｅｃｅｉｖｅｄｍｕｃｈａｔｔｅｎ ｔｉｏｎ.Ｒａｒｅｅａｒｔｈｃｏｍｐｌｅｘｅｓ,ｅｓｐｅｃｉａｌｌｙｔｈｏｓｅｃｏｎｔａｉｎｉｎｇＥｕ3 ａｎｄＴｂ3 ,ｏｆｔｅｎｅｘｈｉｂｉｔｇｏｏｄｌｕｍｉｎｅｓｃｅｎｃｅｏｗｉｎｇｔｏｔｈｅｓｔｒｏｎｇａｂｓｏｒｐｔｉｏｎｏｆｔｈｅｏｒｇａｎｉｃｌｉｇａｎｄｓａｎｄ…