LnPO4( LnPO4=LaPO4:Ce,Tb)是被广泛应用的绿色荧光材料,由于所用的主要原材料之一Tb4O7的价格较为昂贵,导致其生产成本居高不下.如能有效合理地降低稀土磷酸盐绿色荧光粉的生产成本,则可望为照明工业带来显著的效益.报道了一种新型的核壳结构材料LaPO4-LnPO4,该材料以较为廉价的LaPO4作为内部核层,三聚磷酸盐水解缓慢释放的磷酸根与稀土离子通过均相沉淀异相成核的方法在LaPO4表面结合形成LnPO4壳层.所得核壳结构颗粒的荧光发射光谱与纯LnPO4完全一致.在还原性气氛中灼烧后,其发光强度可与市售LnPO4商业产品相当.本方法可将稀土磷酸盐绿色荧光粉的合成成本降低45％左右,而且操作简单,易于进行大规模工业化生产推广,对发光照明行业具有潜在的重要应用价值.
参考文献
| [1] | Feldmann C;Jüstel T;Ronda C R;Schmidt P J .Inorganic luminescent materials:100 years of research and application[J].Advanced Functional Materials,2003,13:511. |
| [2] | Smets B M J .Phosphors based on rare-earths a new era in fluorescent lighting[J].Materials Chemistry and Physics,1987,16:283. |
| [3] | Riwotzki K;Meyssamy H;Schnablegger H;Kornowski A,Haase M .Liquid-phase synthesis of colloids and redispersible powders of strongly luminescing LaPO4:Ce,Tb nanocrystals[J].Angewandte Chemie International Edition,2001,40:573. |
| [4] | Yun Chan Kang;Eun Joung Kim;Dong Youl Lee .High brightness LaPO_4:Ce,Tb phosphor particles with spherical shape[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(1/2):266-270. |
| [5] | Yu M.;Lin J.;Fu J.;Han YC. .Sol-gel fabrication, patterning and photoluminescent properties of LaPO4 : Ce3+, Tb3+ nanocrystalline thin films[J].Chemical Physics Letters,2003(1/2):178-183. |
| [6] | Wuled Lenggoro I;Xia B;Mizushima H;Okuyama K,Kijima N .Synthesis of LaPO4:Ce,Tb phosphor particles by spray pyrolysis[J].Materials Letters,2001,50:92. |
| [7] | Manna L.;Scher EC.;Li LS.;Alivisatos AP. .Epitaxial growth and photochemical annealing of graded CdS/ZnS shells on colloidal CdSe nanorods[J].Journal of the American Chemical Society,2002(24):7136-7145. |
| [8] | Gao X;Chan W C W;Nie S .Quantum-dot nanocrystals for ultrasensitive biological labeling and multicolor optical encoding[J].Journal of Biomedical Optics,2002,7:532. |
| [9] | Jang J;Oh J H .Facile fabrication of photochromic dye-conducting polymer core-shell nanomaterials and their photoluminescence[J].Advanced Materials,2003,15:977. |
| [10] | Fortina P;Kricka LJ;Surrey S;Grodzinski P .Nanobiotechnology: the promise and reality of new approaches to molecular recognition.[J].Trends in Biotechnology,2005(4):168-173. |
| [11] | K(o)mpe K;Borchert H;Storz J;Lobo A,Adam S,M(o)ller T,Haase M .Green-emitting CePO4:Tb/LaPO4 core-shell nanoparticles with 70％ photoluminescence quantum yield[J].Angewandte Chemie International Edition,2003,42:5513. |
| [12] | L ZHU;X Liu;X Liu .Facile sonochemical synthesis of CePO_4:Tb LaPO_4 core shell nanorods with highly improved photoluminescent properties[J].Nanotechnology,2006(16):4217-4222. |
| [13] | Fang Y;Xu A;Dong W .Highly improved green photoluminescence from CePO4:Tb/LaPO4 core/shell nanowires[J].Smal1,2005,1:967. |
| [14] | Yu M;Wang H;Lin CK;Li GZ;Lin J .Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4 : Ce3+/Tb3+ particles with a core-shell structure[J].Nanotechnology,2006(13):3245-3252. |
| [15] | Li L;Tao J;Pan H;Chen H,Wu X,Zhu F,Xu X,Tang R .Colour tuning of core-shell fluorescent material[J].Journal of Materials Chemistry,2008,18:5363. |
| [16] | Buissette V;Moreau M;Gacoin T;Boilot J P,Chane-Ching J Y,LeMercier T .Colloidal synthesis of luminescent rhabdophane LaPO4:Ln3+·xH2O (Ln =Ce,Tb,Eu; x≈-0.7) nanocrystals[J].Chemistry of Materials,2004,16:3767. |
| [17] | Li L;Jiang W;Pan H;Xu X,Tang Y,Ming J,Xu Z,Tang R .Improved luminescence of lanthanide (Ⅲ)-doped nanophosphors by linear aggregation[J].Journal of Physical Chemistry C,2007,111:4111. |
| [18] | Meyssamy H.;Kornowski A.;Naused S.;Haase M.;Riwotzki K. .Wet-chemical synthesis of doped colloidal nanomaterials: Particles and fibers of LaPO4 : Eu, LaPO4 : Ce, and LaPO4 : Ce,Tb[J].Advanced Materials,1999(10):840-844. |
| [19] | Buissette V;Giaume D;Gacoin T;Boilot J P .Aqueous routes to lanthanide-doped oxide nanophosphors[J].Journal of Materials Chemistry,2006,16:529. |
| [20] | Bourcet J-C;Fong F K .Quantum efficiency of diffusion limited energy transfer in La1-x-yCex TbyPO4[J].Journal of Chemical Physics,1974,60:34. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%