Email this article THE EFFECT OF TRI-SODIUM CITRATE DIHYDRATE ON MORPHOLOGICAL AND OPTICAL PROPERTIES OF TbPO4.H2O NANOPHOSPHORS
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Received: 30/07/20 Revised: 31/08/20 Published: 31/08/20Authors
1. Le Thi Vinh, Hanoi University of Mining and Geology2. Ha Thi Phuong, Hanoi Medical University
3. Hoang Thi Khuyen, Institute of Materials Science – VAST
4. Nguyen Manh Hung, Hanoi University of Mining and Geology
5. Le Duc Bao Phuc, Hanoi National University of Education
6. Nguyen Thu Ha, Hanoi University of Mining and Geology
7. Phan Dieu Hang, Hanoi Medical University
8. Tran Thu Huong
, Institute of Materials Science – VAST
Abstract
Luminescent materials doped with rare earth ions which have advantages of high stability, non-complex fabrication, easy surface functionalization, friendly to environment have been very promising materials in biomedical applications. In this report, we present a number of results achieved of the effect of tri-sodium citrate dihydrate agents on morphology and optical properties of TbPO4.H2Onanophosphors. These nanophosphors were successfully synthesised using wet chemistry techniques. Morphological, structure and optical properties of TbPO4.H2Onanophosphors were investigated by field emission scanning electron microscopy, energy-dispersive X-ray, X-ray diffraction and photoluminescence spectroscopy. The mean size of TbPO4.H2O nanorods is about 50 ¸ 80 nm in diameter and 500 ¸ 800 nm in length. The presence of tri-sodium citrate dihydrate (0.1M) have changed the morphology of the nanophosphors from a rods to a rectangular form (with a length of about 100 ¸ 200 nm and a width of about 10 ¸ 30 nm) and improve the luminescent ability of the nanophosphors. The green emission spectrum of TbPO4.H2O nanophosphors is composed of four well-resolved peaks at 488 nm, 540 nm, 585 nm and 618 nm, which correspond to the 5D4-7Fj (J = 6, 5, 4, 3) transitions of Tb3+ ions. These results show high potential application of TbPO4.H2O nanophosphors for the development of fluorescent labelling in biomedicine.
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