Hydrothermal Synthesis And Properties Of Eu³⁺ Dopedcadmium Tungsten?Molybdate?

Rare earth tungsten?molybdenum?acid salt series compound is a kind of scintillating crystal material with excellent luminous properties.Some tungstenite scintillation crystals have important application value in the field of nuclear medical imaging and safety inspection.Some molybdate crystals exhibited good luminescence performance at low temperature.Study on nuclear physics choose some types of the molybdate crystals for experimental material.Therefore,the hotspot of research in this field is the study of the appearance and design of rare earth tungsten?molybdenum?acid salt nanomaterials and the influence of microcosmic size,structure and morphology on the performance.It has social and economic value to develop its application new field.In this paper,a series of rare earth tungsten?molybdenum?acid nanomaterials with a series of structures and morphology were successfully prepared by hydrothermal method.The performance of products is observed by XRD,SEM,FTIR,PL and TEM.The results of the study are summarized as follows:1.Club-like CdWO₄ and CdWO₄:Eu³⁺powders is synthesized from Cd?NO₃?₂·2H₂O?Na₂WO₄·2H₂O?Eu?NO₃?₃·6H₂O with sodium nitrate as auxiliary agent under hydrothermal conditions.The results show that the crystallization effect of nitric acid cadmium was the best in 7g.At the excitation wavelength of lambda?ex=282nm,the powders exhibit a strong red emission.The effect of amount of Eu³⁺is better in 15%.2.White phosphor of CdWO₄:15%Eu³⁺-Bi³⁺is prepared in the hydrothermal method.The product starts to be reunited with a globular growth accompanied by Bi³⁺incorporation.At the excitation wavelength of lambda?ex=275nm,the powder shows a strong red emission.A very small amount of Bi³⁺can show a good sensitization effect.Bi³⁺optimum incorporation is 0.8mol%.The glow intensity of Eu³⁺increased nearly fourfold.3.Globular CdMoO₄ and CdMoO₄:Eu³⁺powders is synthesized from Cd?NO₃?₂·2H₂O?Na₂MoO₄·2H₂O?Eu?NO₃?₃·6H₂O under hydrothermal conditions.At the excitation wavelength of lambda?ex=277nm,the powder shows a strong red emission.With the increase of Eu³⁺content,the concentration will quench.The effect of amount of Eu³⁺is better in 10%.A very small amount of Bi³⁺can show a good sensitization effect.Bi³⁺optimum incorporation is 0.3mol%.The glow intensity of Eu³⁺increased nearly threefold.CdWO₄?CdMoO₄?:Eu³⁺-Bi³⁺powders is synthesized under hydrothermal conditions.In addition,methylene blue is used for photodegradation and its degradation rate of 70min can reach 79.4%-94.6%.4.At two different temperatures,CdWO₄/MnWO₄ and CdWO₄/ZnWO₄ composite nanomaterials are synthesized by Two-step Hydrothermal Method.CdWO₄/MnWO₄exhibits both the luminescence of cadmium tungstate and the magnetic properties of manganese tungstate.CdWO₄/ZnWO₄ exhibits both its luminescence and the photocatalytic activity of zinc tungstate.