The preparation and phase transformation of nanocrystalline cobalt sulfides via a toluene thermal process

Authors
Qian, XF Zhang, XM Wang, C Xie, Y Qian, YT
Citation
Xf. Qian et al., The preparation and phase transformation of nanocrystalline cobalt sulfides via a toluene thermal process, INORG CHEM, 38(11), 1999, pp. 2621-2623
Citations number
15
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
INORGANIC CHEMISTRY
ISSN journal
00201669 → ACNP
Volume
38
Issue
11
Year of publication
1999
Pages
2621 - 2623
Database
ISI
SICI code
0020-1669(19990531)38:11<2621:TPAPTO>2.0.ZU;2-H
Abstract
Nanocrystalline cobalt sulfides were prepared by the reactions between coba lt chlorides and sodium polysulfide via a toluene thermal process in the te mperature range 120-170 degrees C. Two single phases of Co9S8 and CoS2 were obtained. TEM microphotos showed that the Co9S8 and CoS2 particles were bo th spherical in shape with sizes of about 20 nm. Chemical analysis gave the formulas Co9S7.93 and CoS1.97, respectively. The transformations among cob alt sulfides (Co9S8, Co3S4, and CoS2) with changing reaction conditions and precursors were studied.