Preparation of ternary rare earth sulfide La_xCe_2-xS₃ as red pigment

袁海滨^1,2，张剑辉¹，余瑞金¹，苏锵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 University2. Institute of Materials Science and Engineering,Henan Polytechnic University

摘 要：In order to investigate the suitability of ternary rare earth sulfide LaxCe2-xS3 in plastic application as a red pigment,we prepared LaxCe2-xS3 via the sulfurization of the oxide powders using CS2 gas.In the sulfurization of LaxCe2-xS3,β-phase and γ-phase ternary rare earth sulfide LaxCe2-xS3 were synthesized at the sulfurization temperature of 1000 and 1250 oC for 3 h,respectively.The UV-vis absorption spectra of synthesized LaxCe2-xS3 showed that the absorption wavelengths of β-phase and γ-phase LaxCe2-xS3 samples were in the region of 617-670 nm and 607-653 nm,respectively.They were in red absorption region.Furthermore,the scanning electron microscopy（SEM）results of the synthesized LaxCe2-xS3 samples were investigated.The typical SEM micrographs indicated that the particle sizes of synthesized LaxCe2-xS3 were in the range of 0.5-6 μm.

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