ZnS-Zn nanocables and ZnS nanotubes have been synthesized by a thermochemical process in a simple and safe way. The as-prepared nanocables consist of a single crystal Zn core with a diameter of 20 nm and a polycrystalline ZnS sheath with a thickness of 8 nm. The evaporation of the Zn core leads to the formation of ZnS nanotubes.

Cerium(III) sulfide (Ce 2 S 3 ) powder was synthesized via the sulfurization of ceria (CeO 2 ) powder using carbon disulfide gas. Single-phase ␣-Ce 2 S 3 could be formed via sulfurization at 973 K for 28.8 ks. The preparation of ␣-Ce 2 S 3 became feasible at low temperature, in comparison to sulfurization using hydrogen sulfide gas. According to the fact that the formation of ␣-Ce 2 S 3 was accelerated by the addition of carbon black to the CeO 2 powder, carbothermic reduction was considered to become a dominant reaction, as the temperature increased. To obtain the activation energy for the densification of ␤-Ce 2 S 3 powder, which was prepared by vacuum heating ␣-Ce 2 S 3 , the data of densification by hot pressing was analyzed by a kinetic equation that was proposed by other researchers. As a result, the sintering behavior could be best explained by a grain-boundarydiffusion mechanism that had an apparent activation energy of 382 kJ/mol.

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InS nanowires uniformly sheathed with amorphous SiO2 were synthesized via a physical vapor deposition process. InS nanowires were 20–100 nm in diameter, and the SiO2 sheaths were 5–20 nm in thickness. Single-crystalline InS cores displayed orthorhombic structure and their longitudinal directions were preferentially aligned in the [100] orientation. Pure SiO2 nanotubes of typically round cross sections were also obtained by removing InS cores from the prepared nanocables via thermal evaporation. Photoluminescence measurements on these SiO2 nanotubes demonstrated strong visible-light emission peaked at 570 nm.

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