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Synthesis of rare earth sulfides and their UV-vis absorption spectra

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【作者】 袁海滨张剑辉余瑞金苏锵

【Author】 YUAN Haibin1,2, ZHANG Jianhui 1, YU Ruijin 1, SU Qiang 1 (1. MOE Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China; 2. Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China)

【机构】 MOE Laboratory of Bioinorganic and Synthetic Chemistry,State Key Laboratory of Optoelectronic Materials and Technologies,School of Chemistry and Chemical Engineering,Sun Yat-sen University,Guangzhou 510275,ChinaInstitute of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China

【摘要】 Rare earth sulfides were systematically synthesized via the sulfurization of their commercial oxide powders using CS2 gas to shorten sulfurization time, and their UV-vis absorption spectra were investigated. The appropriate sulfurization conditions were studied. For the rare earth sulfides with the same crystal structure, the sulfurization temperature showed increasing tendency with the decrease of rare earth element atomic radii. The UV-vis absorption spectra of rare earth sulfides did not depend on the crystal structure of rare earth sulfides, but on the 4f electronic structure of rare earth element. The data showed that the optical band gaps of rare earth sulfides were irregular, and the values ranged from 1.65 to 3.75 eV.

【Abstract】 Rare earth sulfides were systematically synthesized via the sulfurization of their commercial oxide powders using CS2 gas to shorten sulfurization time, and their UV-vis absorption spectra were investigated. The appropriate sulfurization conditions were studied. For the rare earth sulfides with the same crystal structure, the sulfurization temperature showed increasing tendency with the decrease of rare earth element atomic radii. The UV-vis absorption spectra of rare earth sulfides did not depend on the crystal structure of rare earth sulfides, but on the 4f electronic structure of rare earth element. The data showed that the optical band gaps of rare earth sulfides were irregular, and the values ranged from 1.65 to 3.75 eV.

【基金】 supported by the National Natural Science Foundation of China (20501023);the Natural Science Foundation of Guangdong for Doctorial Training Base (5300527)
  • 【文献出处】 Journal of Rare Earths ,稀土学报(英文版) , 编辑部邮箱 ,2009年02期
  • 【分类号】TG146.45
  • 【被引频次】28
  • 【下载频次】131
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