Large-scale synthesis of nickel sulfide micro/nanorods via a hydrothermal process
来源期刊：International Journal of Minerals Metallurgy and Materials2015年第7期
论文作者：Peng-fei Yin Xiang-yu Han Chao Zhou Chuan-hui Xia Chun-lian Hu Li-li Sun
文章页码：762 - 769
摘 要：Rhombohedral-phase NiS micro/nanorods were synthesized on a large scale through a hydrothermal method using NiC l2·6H2O and thiourea crystals as starting precursors. Recrystallized thiourea was observed to play an important role in the formation of micro/nanosized rods and flower-like structures. The molar ratio and reaction temperature of the precursors influenced the morphology and phase of NiS products. Pure rhombohedral NiS micro/nanorods were obtained on a large scale when the molar ratio between NiC l2·6H2O and thiourea crystals was fixed at 2:1, and the mixture was heated at 250°C for 5 h. Flower-like NiS nanostructures were formed when the molar ratio between NiC l2·6H2O and thiourea crystals was maintained at 1:1. The Raman and Fourier-transform infrared（FTIR） spectra of the as-prepared rhombohedral NiS micro/nanorods were collected, and their magnetic properties were investigated. The results showed that the FTIR absorption peaks of the as-prepared product are located at 634 cm-1 and their Raman peaks are located at 216 and 289 cm-1; the as-prepared NiS micro/nanorods exhibited weak ferromagnetic behavior due to the size effect.
Peng-fei Yin1，Xiang-yu Han1，Chao Zhou2，Chuan-hui Xia1，Chun-lian Hu1，Li-li Sun3
1. College of Science, Chongqing Jiaotong University2. Department of Materials Science, Chongqing Jiaotong University3. Department of Physics, Third Military Medical University
摘 要：Rhombohedral-phase NiS micro/nanorods were synthesized on a large scale through a hydrothermal method using NiC l2·6H2O and thiourea crystals as starting precursors. Recrystallized thiourea was observed to play an important role in the formation of micro/nanosized rods and flower-like structures. The molar ratio and reaction temperature of the precursors influenced the morphology and phase of NiS products. Pure rhombohedral NiS micro/nanorods were obtained on a large scale when the molar ratio between NiC l2·6H2O and thiourea crystals was fixed at 2:1, and the mixture was heated at 250°C for 5 h. Flower-like NiS nanostructures were formed when the molar ratio between NiC l2·6H2O and thiourea crystals was maintained at 1:1. The Raman and Fourier-transform infrared（FTIR） spectra of the as-prepared rhombohedral NiS micro/nanorods were collected, and their magnetic properties were investigated. The results showed that the FTIR absorption peaks of the as-prepared product are located at 634 cm-1 and their Raman peaks are located at 216 and 289 cm-1; the as-prepared NiS micro/nanorods exhibited weak ferromagnetic behavior due to the size effect.
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