Preparation of homogeneous porous Zn-CoOx and its response to alcohols under relative low operating temperature

Publication date: Available online 20 January 2020Source: Chinese Chemical LettersAuthor(s): Xiao Zhang, Yaohua Xu, Hao Liu, Wenrui Zhao, Anjie Ming, Feng WeiAbstractA homogeneous porous Co3O4-ZnO nanomaterial (Zn-CoOx) was successfully fabricated by precipitation-annealing route. The as-prepared Zn-CoOx exhibited good response, reliable reversibility and good selectivity towards alcohols, which attributed to the porous structure and p-n heterojunction formed between Co3O4 and ZnO. In particular, the different Fermi levels of Co3O4 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 Co3O4 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.Graphical AbstractPreparation of homogeneous porous Zn-CoOx and its response to alcohols under relative low operating temperatureThe fabricated Zn-CoOx is sensitivity to alcohol gases. The p-n heterojunction formed between ZnO and Co3O4 enhance the performance of gas sensing.
Source: Chinese Chemical Letters - Category: Chemistry Source Type: research