Preparation of homogeneous porous Zn-CoOx and its response to alcohols under relative low operating temperature
A homogeneous porous Co 3 O 4 -ZnO nanomaterial (Zn-CoO x ) was successfully fabricated by precipitation-annealing route. The as-prepared Zn-CoO x exhibited good response, reliable reversibility and good selectivity towards alcohols, which attributed to the porous structure and p-n heterojunction formed between Co 3 O 4 and ZnO. In particular, the different Fermi levels of Co 3 O 4 and ZnO leaded to a further increase the depth of the space charge layer, which improved the gas sensitivity of the material from 10% to 480%. Besides, the continuous Co 3 O 4 leaded to a relatively lower operating temperature and resistance. This material preparation method and bimetallic oxides could be widely used in the research and development of metal oxide gas sensitive materials and sensors.
危险品化学品经营许可证（带存储）