Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 20    No. 3    March 2010

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Sol-gel synthesis and photoluminescence of LaPO4׃Eu3+ nanorods
GAO Rui(高 锐)1, QIAN Dong(钱 东)1, LI Wei(李 卫)1, 2

1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Abstract:Monoclinic LaPO4 nanostructures with uniform rod shape have been successfully synthesized by a simple sol-gel method. The procedure involves formation of homogeneous, transparent, metal-citrate-EDTA gel precursors, followed by calcination to promote thermal decomposition of the gel precursors to yield the LaPO4 nanoparticles. Their morphologies and structures were characterized by XRD, TEM, TG-DSC and HRTEM. The results indicate that single monoclinic phase LaPO4 nanorods are readily obtained at 800 ℃ within 3 h. Furthermore, photoluminescence (PL) characterization of the Eu3+-doped LaPO4 nanocrystals was carried out. The effects of calcination temperatures and Eu3+ doping content on the PL properties were elaborated in detail. Room-temperature photoluminescence (PL) characterization reveals that the optical brightness as well as the intensity ratio of 5D0-7F1 to 5D0-7F2 is highly dependent on the calcination temperature, and the Eu0.05La0.95PO4 nanophosphor shows the relatively promising PL performance with the most intense emission.

 

Key words: LaPO4; Eu doping; sol-gel; nanorods; photoluminescence

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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