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摘要
Octahedrally shaped NiO powders have been synthesized via a one-step composite-hydroxide-mediated method without any surfactant. The synthesized materials are characterized by XRD, EDS, TEM and FESEM techniques. Each particle exhibited a nearly perfect octahedron shape with sharp edges and corners as well as smooth surfaces. The octahedral NiO particles performed better gas-sensitivity toward ethanol than that of NiO nanopowders, which was attributed to the exposed {111} facets of octahedron. The result was confirmed by the first-principle calculation which indicated that the (111) facet was more active than (100) and (110) facet.
- 出版日期2014-3
- 单位安徽工业大学
