TY - JOUR
T1 - Highly uniform NaLa(MoO4)2:Eu3+ microspheres
T2 - Microwave-assisted hydrothermal synthesis, growth mechanism and enhanced luminescent properties
AU - Wu, Hongming
AU - Chen, Hu
AU - Liu, Yunfei
AU - Lu, Yinong
AU - Zhang, Duoqing
PY - 2014/7
Y1 - 2014/7
N2 - Uniform and well-crystallized NaLa(MoO4)2 microspheres were prepared by a facile microwave-assisted hydrothermal method at low temperature without any surfactants or templates. The as-prepared products were systematically characterized by powder X-ray diffractometer, scanning electron microscope, high resolution transmission electron microscope (HRTEM) and photoluminescence (PL) spectrometer. The results indicate that the phase, morphology, and size of the products can be tuned by altering reaction temperature and time. A possible formation mechanism of the microspheres was proposed based on the time-dependent experiments and HRTEM results, which contained an oriented attachment and Ostwald ripening process. Under ultraviolet excitation, the NaLa(MoO4)2:Eu3+ microcrystals exhibit strong red luminescence at 613 nm which attributes to 5D0 → 7F2 transition of Eu 3+. The dependence of NaLa(MoO4)2:Eu 3+ PL intensity on different morphologies have been investigated in detail. The results revealed that the PL intensity of NaLa(MoO4) 2:Eu3+ microspheres is higher than that of polyhedrons and dendrites particles, and proved that the microspheres might have potential application in solid lighting technology.
AB - Uniform and well-crystallized NaLa(MoO4)2 microspheres were prepared by a facile microwave-assisted hydrothermal method at low temperature without any surfactants or templates. The as-prepared products were systematically characterized by powder X-ray diffractometer, scanning electron microscope, high resolution transmission electron microscope (HRTEM) and photoluminescence (PL) spectrometer. The results indicate that the phase, morphology, and size of the products can be tuned by altering reaction temperature and time. A possible formation mechanism of the microspheres was proposed based on the time-dependent experiments and HRTEM results, which contained an oriented attachment and Ostwald ripening process. Under ultraviolet excitation, the NaLa(MoO4)2:Eu3+ microcrystals exhibit strong red luminescence at 613 nm which attributes to 5D0 → 7F2 transition of Eu 3+. The dependence of NaLa(MoO4)2:Eu 3+ PL intensity on different morphologies have been investigated in detail. The results revealed that the PL intensity of NaLa(MoO4) 2:Eu3+ microspheres is higher than that of polyhedrons and dendrites particles, and proved that the microspheres might have potential application in solid lighting technology.
UR - http://www.scopus.com/inward/record.url?scp=84902548983&partnerID=8YFLogxK
U2 - 10.1007/s10854-014-1991-2
DO - 10.1007/s10854-014-1991-2
M3 - 文章
AN - SCOPUS:84902548983
SN - 0957-4522
VL - 25
SP - 3109
EP - 3115
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - 7
ER -