Different morphologies of ZnO and their triethylamine sensing properties

Triethylamine (TEA) is one of toxic volatile organic compounds (VOCs) which deserve to be studied in the field of gas sensors. In this paper, three kinds of ZnO samples (microrods, microflowers, and mircropyramids) were synthesized to learn the inner relationship which results in the different TEA sensing performances. Based on the model of surface atoms arrangement and theory of oxygen vacancy, we found that the different surface structures plays crucial role in the TEA sensing properties. Moreover, the order of TEA sensing properties of ZnO crystallite planes is confirmed as list: (0001) > {10 (1) over bar0} > {10 (1) over bar1} > (000 (1) over bar). (C) 2017 Published by Elsevier B.V.