TY - JOUR
T1 - Synthesis and characterization of LnPO 4 · nH 2O (Ln = La, Ce, Gd, Tb, Dy) nanorods and nanowires
AU - Di, Weihua
AU - Wang, Xiaojun
AU - Zhao, Haifeng
PY - 2007/10
Y1 - 2007/10
N2 - Aqueous precipitation method has been used to synthesize lanthanide orthophosphates LnPO 4 · nH 2O (Ln = La, Ce, Gd, Tb, Dy) with high purity and yield. It has been shown by XRD, TGA, and FTIR characterization that the as-synthesized samples are the LnPO 4 hydrates (LnPO 4 · nH 2O) with hexagonal rhabdophane-type structure. The X-ray diffraction peaks and absorption of PO 4 3- groups show a systematic shift from LaPO 4 · nH 2O to DyPO 4 · nH 2O due to the effect of lanthanide ionic contraction. The value of n in LnPO 4 · nH 2O depends on the lanthanide element and synthetic condition. Field-emission scanning electron microscopy observations show the morphology of as-synthesized samples, which consist entirely of nanorods/nanowires with diameters of 30-100 nm and lengths ranging from several hundreds of nanometers to several micrometers. The anisotropic growth of crystals should be responsible for the formation of nanorods/nanowires, which is related to the hexagonal crystal structure.
AB - Aqueous precipitation method has been used to synthesize lanthanide orthophosphates LnPO 4 · nH 2O (Ln = La, Ce, Gd, Tb, Dy) with high purity and yield. It has been shown by XRD, TGA, and FTIR characterization that the as-synthesized samples are the LnPO 4 hydrates (LnPO 4 · nH 2O) with hexagonal rhabdophane-type structure. The X-ray diffraction peaks and absorption of PO 4 3- groups show a systematic shift from LaPO 4 · nH 2O to DyPO 4 · nH 2O due to the effect of lanthanide ionic contraction. The value of n in LnPO 4 · nH 2O depends on the lanthanide element and synthetic condition. Field-emission scanning electron microscopy observations show the morphology of as-synthesized samples, which consist entirely of nanorods/nanowires with diameters of 30-100 nm and lengths ranging from several hundreds of nanometers to several micrometers. The anisotropic growth of crystals should be responsible for the formation of nanorods/nanowires, which is related to the hexagonal crystal structure.
KW - Aqueous precipitation
KW - Characterization
KW - Luminescence
KW - Nanomaterials
KW - Rare earth
UR - http://www.scopus.com/inward/record.url?scp=41649118759&partnerID=8YFLogxK
U2 - 10.1166/jnn.2007.847
DO - 10.1166/jnn.2007.847
M3 - Article
C2 - 18330183
AN - SCOPUS:41649118759
SN - 1533-4880
VL - 7
SP - 3624
EP - 3628
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
IS - 10
ER -