Abstract
A facile, rapid and environmental-friendly method was developed to prepare ZnO with different morphologies and superficial structures just using Zn(NO3)2 and hexamethylenetetramine (HMTA) as precursors by tuning nucleation rate. Rod-like ZnO-1 and ZnO-5, and irregular ZnO-10 and ZnO-20 were obtained as the amounts of the used reagents are 1, 5, 10 and 20 mmol, respectively. Compared to ZnO-1, the responses of ZnO-5, ZnO-10 and ZnO-20 toward ethanol were improved greatly, which could be attributed to their alternative active adsorbed oxygen species (O2−/O− for ZnO-5, ZnO-10 and ZnO-20, O2− for ZnO-1). It was proposed that the different active adsorbed oxygen species might result from the different activation of ethanol with the aid of ZnO. The response of ZnO-10 toward 50 ppm ethanol is 115, about five times higher than that of ZnO-1, and the best gas-sensing performance of ZnO-10 was deemed to result from its largest specific surface area and highest percentage of adsorbed oxygen.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51578034), Beijing Postdoctoral Research Foundation, Great Wall Scholars Training Program Project of Beijing Municipality Universities (CIT&TCD20180323), Project of Construction of Innovation Teams and Teacher Career Development for Universities and Colleges Under Beijing Municipality (IDHT20170508), Beijing Talent Project (2017A38), Scientific Research Foundation of Beijing University of Civil Engineering and Architecture (KYJJ2017008), and the Fundamental Research Funds for Beijing University of Civil Engineering and Architecture (X18276).
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Song, XX., Fu, H., Li, X. et al. Facile and Rapid Preparation of ZnO Nanomaterials with Different Morphologies and Superficial Structures for Enhanced Ethanol-Sensing Performances. J Inorg Organomet Polym 29, 33–40 (2019). https://doi.org/10.1007/s10904-018-0961-1
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DOI: https://doi.org/10.1007/s10904-018-0961-1