Hydrothermal syntheses and gas sensing properties of cubic and quasi-cubic Zn(2)SnO(4)
- 化学化工－已发表论文 
Zinc stannates (Zn(2)SnO(4)) with different morphologies and crystal structures were synthesized via low-temperature hydrothermal method in the presence of various alkaline mineralizers. Zn(2)SnO(4) generally crystallizes into an inverse spinel crystal structure (cubic phase). However, we found that Zn(2)SnO(4) could assembly into a slightly distorted cubic structure (quasi-cubic phase) for the first time by using tetrabutylammonium hydroxide as an alkaline mineralizer. In addition, we successfully tuned the morphologies of the as-prepared Zn(2)SnO(4) particles, from cube, cuboctahedron, truncated octahedron, to octahedron, by adjusting the type and the concentration of alkaline mineralizers and surfactants. Compared with cubic Zn(2)SnO(4), the quasi-cubic Zn(2)SnO(4) showed a noticeable red shift of the band gap, and the gas sensors based on quasi-cubic Zn(2)SnO(4) exhibited high sensitive performance to alcohol. XPS analyses revealed that the shift of Zn 2p(3/2) binding energy in the quasi-cubic Zn(2)SnO(4), which indicated some Zn ions in quasi-cubic Zn(2)SnO(4) adopted different coordination environments from regular tetrahedral/octahedral ones adopted in cubic Zn(2)SnO(4). (C) 2011 Elsevier B.V. All rights reserved.
出处MATERIALS CHEMISTRY AND PHYSICS，2011,129（1-2）：53-61