Li Fuhai, Liu Hai, Yu Lixin
Department of Materials Science and Engineering, Nanchang University, 330031 Nanchang, PR China.
J Nanosci Nanotechnol. 2013 Jul;13(7):5115-8. doi: 10.1166/jnn.2013.7597.
The ZnO short nanorods and flowerlike nanostructures doped with Eu3+ ions are prepared by a hydrothermal method through adjusting the hydrothermal temperature. The XRD, FESEM, FT-IR, luminescent and photocatalytic properties are characterized. The results indicate that the hydrothermal temperature affects the morphology of ZnO:Eu3+ nanocrystals, short nanorods at 120 degrees C, flowerlike nanocrystals at 150 degrees C and nanoparticles at 180 degrees C. The structures of ZnO:Eu3+ nanocrystals prepared at different hydrothermal temperatures are assigned to hexagonal phase. The photoluminescent properties including excitation and emission spectra are studied. The charge transfer band and f-f transition absorption are observed in excitation spectra. And, the 5D(0)-7F(J) (J = 0-4) transition emissions appear in emission spectra. In addition, the photocatalytic properties are also studied. The degradation rate of ZnO:Eu3+ nanocrystals is a little lower than pure ZnO nanocrystals.
通过水热法，通过调节水热温度制备了掺杂Eu3+离子的ZnO短纳米棒和花状纳米结构。对其XRD、FESEM、FT-IR、发光和光催化性能进行了表征。结果表明，水热温度影响ZnO:Eu3+纳米晶体的形貌，120℃时为短纳米棒，150℃时为花状纳米晶体，180℃时为纳米颗粒。不同水热温度下制备的ZnO:Eu3+纳米晶体结构均为六方相。研究了包括激发光谱和发射光谱在内的光致发光性能。在激发光谱中观察到电荷转移带和f-f跃迁吸收。并且，在发射光谱中出现了5D(0)-7F(J) (J = 0-4)跃迁发射。此外，还研究了光催化性能。ZnO:Eu3+纳米晶体的降解率略低于纯ZnO纳米晶体。
