LI Jing-lei, LI Ke-yan, SHI Shi-kao etc. Sol-gel Green Synthesis and Luminescent Properties of CeO<sub>2</sub>: Eu<sup>3+</sup> Nanopowders[J]. Chinese Journal of Luminescence, 2016,37(4): 405-409
LI Jing-lei, LI Ke-yan, SHI Shi-kao etc. Sol-gel Green Synthesis and Luminescent Properties of CeO<sub>2</sub>: Eu<sup>3+</sup> Nanopowders[J]. Chinese Journal of Luminescence, 2016,37(4): 405-409 DOI: 10.3788/fgxb20163704.0405.
Sol-gel Green Synthesis and Luminescent Properties of CeO2: Eu3+ Nanopowders
red nanopowders were sol-gel synthesized by using cerium nitrate as raw materials and starch as dispersing agent. In the sol-gel process
the pH value was adjusted by ammonia. The crystal structure
morphology
luminescence properties and chromaticity coordinates of the nanopowders calcined at different temperatures were analyzed by X-ray diffraction patterns
field emission scanning electron microscopy and spectrofluorometer. The results reveal that the obtained samples are of cubic fluorite structure with the space group
Fm3m
. The particles are approximately spherical with the size of 10-60 nm. With the increase of calcination temperature
the size of CeO
2
increases gradually and the red luminescence of the nanopowders is obviously enhanced. After calcination at 800 ℃
the nanopowders can be effectively excited at near UV (370 nm) and blue (468 nm) regions
which is beneficial to the application in solid state lighting. The approach using starch as dispersing agent in sol-gel processes is simple
green and economical for large scale preparation of nanoceria.
关键词
Keywords
references
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