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Low-temperature route to nanoscale P3N5 hollow spheres

Published online by Cambridge University Press:  03 March 2011

Hongzhou Gu ,
Yunle Gu ,
Zhefeng Li ,
Yongcheng Ying  and
Yitai Qian
Hongzhou Gu
Affiliation:
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
Yunle Gu
Affiliation:
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
Zhefeng Li
Affiliation:
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
Yongcheng Ying
Affiliation:
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
Yitai Qian*
Affiliation:
Structure Research Laboratory and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
*
a)Address all correspondence to this author. e-mail: ytqian@ustc.edu.cn
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Abstract

Nanoscale hollow spheres of amorphous phosphorus nitride (P3N5) were synthesized by reacting PCl3 with NaN3 at 150–250 °C. Transmission electron microscope images show that the hollow spheres have a diameter of 150–350 nm, and the thickness of the shell is 20 nm. A very small amount of curly films were also found in the sample prepared at 150 °C. The infrared spectrum indicates a high degree of purity. X-ray photoelectron spectroscopy indicates the presence of P and N, with a molar ratio of 1:1.62 for P:N. Ultraviolet-visible absorption spectroscopy shows an absorption band at 265–315 nm. Under photoluminescent excitation at 230 nm, the P3N5 emits ultraviolet light at 305 nm. With a band gap of 4.28 eV, the products may be a wide gap semiconductor. A possible mechanism and the influence of temperature on the formation of the hollow spheres are also discussed.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 10 , October 2003 , pp. 2359 - 2363
Copyright
Copyright © Materials Research Society 2003

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