二元溶剂热法合成花生状CaWO_4∶Tb~(3+)及其发光性能研究
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摘要
分别以水和乙醇、乙二醇的二元溶剂热法及热处理合成四方晶系CaWO_4∶Tb~(3+)球状、花生状微晶结构,利用XRD、SEM、FT-IR、DRS和PL等对其结构和形貌及性能进行表征。在不同溶剂中,反应温度为120℃,反应时间为24h的溶剂热条件下所得前驱物置于600℃煅烧后分别得到四方晶系CaWO_4∶Tb~(3+)微球、花生状微晶结构;用253nm的紫外光激发产物都发射出绿色光;花生状CaWO_4∶Tb~(3+)的荧光强度明显强于微球。
The tetragonal phase of CaWO_4∶Tb~(3+)peanut-like mirostructures and microsphere were solvothermally synthesized,used a thermal decomposition route in a binary solution of water and ethanol,or ethylene glycol.Using XRD,SEM,FT-IR,DRS and PL to characterize the structure,morphology and properties of the samples.The as-prepared sample synthesized at 120℃for 24 hwere pure tetragonal phase CaWO_4∶Tb~(3+)microspheres and peanut-like mirostructures.The photoluminescence spectrum showed that a strong PL emission peak from the production,which was mainly located in the green light region with maximum intensity centered.The luminescence intensity of CaWO_4∶Tb~(3+)peanut-like mirostructures higher than that microspheres.
The tetragonal phase of CaWO_4∶Tb~(3+)peanut-like mirostructures and microsphere were solvothermally synthesized,used a thermal decomposition route in a binary solution of water and ethanol,or ethylene glycol.Using XRD,SEM,FT-IR,DRS and PL to characterize the structure,morphology and properties of the samples.The as-prepared sample synthesized at 120℃for 24 hwere pure tetragonal phase CaWO_4∶Tb~(3+)microspheres and peanut-like mirostructures.The photoluminescence spectrum showed that a strong PL emission peak from the production,which was mainly located in the green light region with maximum intensity centered.The luminescence intensity of CaWO_4∶Tb~(3+)peanut-like mirostructures higher than that microspheres.
引文
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[2]Tian Y,Liu Y,Hua R,et al.Synthesis and luminescent properties of spindle-like CaWO4∶Sm3+phosphors[J].Mater Res Bull,2012,47(1):59-62.
[3]李剑秋,黄志良.掺Eu3+,Tb3+钨酸钙的共沉淀法制备及表征[J].武汉工程大学学报,2008,30(4):76-78.
[4]Liao J S,Qiu B,Wen H R,et al.Photoluminescence green in microspheres of CaWO4∶Tb3+processed in conventional hydrothermal[J].Optical Materials,2009,31(10):1513-1516.
[5]Mahlik S,Cavalli E,Bettinelli M,et al.Luminescence of CaWO4∶Pr3+and CaWO4∶Tb3+at ambient and high hydrostatic pressures[J].Radiation Measurements,2013,56(4):1-5.
[6]樊国栋,程蝉,黎永利,等.钨酸盐发光材料MWO4∶Eu3+(M=Ca,Sr)的制备及表征[J].陕西科技大学学报,2014,32(1):78-81.
[7]Cheng X R,Yuan C S,Su L,et al.Effects of pressure on the emission of CaWO4∶Eu3+phosphor[J].Optical Materials,2014,37(0):214-217.
[8]Wang M,Shi Y J,Tang Y F,et al.Nanoparticles-assembled CaWO4∶Tb3+hollow microspheres:Glycine-assisted fabrication,characterization and photoluminescence[J].Materials Letters,2013,109(15),12-15.
[9]Hou Z Y,Li C X,Yang J,et al.One-dimensional CaWO4and CaWO4∶Tb3+nanowires and nanotubes:electrospinning preparation and luminescent properties[J].Journal of Materials Chemistry,2009,19(18):2737.
[10]Mann S,Ozin G A.Synthesis of inorganic materials with complex form[J].Nature,1996,382(6589),313-318.
[11]Xu H Z,Ying D M,Lu A D,et al.Surfactant-assistant solvothermal synthesis of CaWO4∶Eu3+phosphors and luminescence[J].Superlattices and Microstructures,2015,83(0):668-675.
[12]刘桂霞,张颂,董相廷,等.多种形貌YF3∶Eu3+纳米发光材料的水热合成与性能比较[J].化学学报,2010,68(13):1298-1302.
[13]杜永芳,宋继梅,王红,等.不同形貌SrMoO4材料的制备及光致发光性质[J].阜阳师范学院:自然科学版,2012,29(3):18-23.