Abstract
A fast and simple method using co-grinding with Fe powder followed by heat treatment is developed to regulate surface oxygen vacancy content of ZnO nanoparticles. The moderately increased surface oxygen vacancy is conducive to shortening the adsorption and desorption times of NO2 molecules, arising from the enhanced O2 adsorption. Therefore, the response and recovery speeds of ZnO nanoparticle-based sensor under UV irradiation were significantly promoted. Our findings not only offer a feasible strategy to modulate surface oxygen vacancy content of nanostructured oxides, but also provide a novel approach to improve the response and recovery speeds of light-activated NO2 sensor.
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This work is partially supported by the Funds for Creative Research Groups of China (No. 61421002), the National Natural Science Foundation of China (Grant Nos. 61571097, 61604033) and the National Postdoctoral Program for Innovative Talents (Grant No. BX201600026).
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Zhang, Q., Chen, C., Liu, Y. et al. Improved response/recovery speeds of ZnO nanoparticle-based sensor toward NO2 gas under UV irradiation induced by surface oxygen vacancies. J Mater Sci: Mater Electron 30, 11395–11403 (2019). https://doi.org/10.1007/s10854-019-01488-6
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DOI: https://doi.org/10.1007/s10854-019-01488-6