Interface Bonds Determined Gas-Sensing of SnO2–SnS2 Hybrids to Ammonia at Room Temperature

• DOI: 10.1021/acsami.5b01856
• Publication Date: 2015-05-08T18:07:27Z
• Authors: Keng Xu; Neng Li; Dawen Zeng; Shouqin Tian; Shasha Zhang; Die Hu; Changsheng Xie
• Keywords: 02 engineering and technology; 0210 nano-technology

Unique gas-sensing properties of semiconducting hybrids that are mainly related to the heterogeneous interfaces have been considerably reported. However, effect on is still unclear, which hinders development in applications. In this work, SnO2–SnS2 were synthesized by oxidation SnS2 at 300 °C with different times and exhibited high response NH3 room temperature. With increasing time, relative concentration interfacial Sn bonds, O–Sn–S, among total species increased first then decreased. Interestingly, it can be found temperature a strong dependence bonds. more chemical bonds interface, lower interface state density higher charge SnO2 led chemisorbed oxygen, resulting NH3. Our results revealed real roles importance offers guidance for material design develop hybrid-based sensors.