Fabrication and properties of high efficiency luminescent nanorods EuPO4·H2O by soft template method
来源期刊：Journal of Rare Earths2011年第12期
论文作者：Tran Thu Huong Tran Kim Anh Le Thi Vinh Hoang Thi Khuyen Le Quoc Minh
文章页码：1174 - 1177
摘 要：Europium orthophosphate monohydrate（EuPO4·H2O） nanorods with typical dimensions of about 10-30 nm in diameter and 300-500 nm in length were prepared by using the soft template method.The effects of using diethylene glycol（DEG） and polyethylene gly-col（PEG） polymers as well as the pH values on the size,crystalline structure and morphology of EuPO4·H2O nanorods were investigated.Field emission scanning electron microscopy（FESEM） and X-ray diffraction（XRD） data of the prepared samples were elucidated.The nano-rods were highly uniform and their mean length was reduced by using DEG and PEG as soft template agents.For all prepared samples,the rhabdophane-type hexagonal EuPO4·H2O was the dominated phase.The photoluminescence（PL） spectroscopy measurements of EuPO4·H2O nanorods revealed that,under UV excitation,EuPO4·H2O nanorods exhibited strong luminescence with narrow bands corresponding to the in-tra-4f transitions of 5D0→7Fj（j=1,2,3,4） of Eu3+ ions.The peaks were found at 594 nm（5D0→7F1） ,619 nm（5D0→7F2） ,652 nm（5D0→7F3） ,and 697 nm（5D0→7F4） ,with the strongest emission at 594 nm.
Tran Thu Huong1，Tran Kim Anh1，Le Thi Vinh2，Hoang Thi Khuyen1，Le Quoc Minh1,4
1. Institute of Materials Science,Vietnam Academy of Science and Technology2. Department of Chemistry,Hanoi University of Mining and Geology4. University of Engineering and Technology,National University Hanoi
摘 要：Europium orthophosphate monohydrate（EuPO4·H2O） nanorods with typical dimensions of about 10-30 nm in diameter and 300-500 nm in length were prepared by using the soft template method.The effects of using diethylene glycol（DEG） and polyethylene gly-col（PEG） polymers as well as the pH values on the size,crystalline structure and morphology of EuPO4·H2O nanorods were investigated.Field emission scanning electron microscopy（FESEM） and X-ray diffraction（XRD） data of the prepared samples were elucidated.The nano-rods were highly uniform and their mean length was reduced by using DEG and PEG as soft template agents.For all prepared samples,the rhabdophane-type hexagonal EuPO4·H2O was the dominated phase.The photoluminescence（PL） spectroscopy measurements of EuPO4·H2O nanorods revealed that,under UV excitation,EuPO4·H2O nanorods exhibited strong luminescence with narrow bands corresponding to the in-tra-4f transitions of 5D0→7Fj（j=1,2,3,4） of Eu3+ ions.The peaks were found at 594 nm（5D0→7F1） ,619 nm（5D0→7F2） ,652 nm（5D0→7F3） ,and 697 nm（5D0→7F4） ,with the strongest emission at 594 nm.
关键词：
