Abstract
Graphene quantum dots (GQDs) and GQDs–ZnO composites with different amounts of GQDs have been synthesized via a hydrothermal method. The GQDs were characterized HRTEM and size distribution analyzer. The GQDs–ZnO composites were studied by XRD, SEM, TG, FTIR, Raman and XPS, respectively. The gas sensing properties of GQDs–ZnO composites were investigated. It was found that the amount of GQDs in the composite has great influence on the gas response and gas sensing selectivity of the composite; the sensors based on GQDs–ZnO composites could be operated at room temperature and showed higher response to acetic acid gas than pure ZnO sensor; the sensor based on GQDs–ZnO (S-10) composite could detect 1 ppm acetic acid vapor at room temperature.
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This work was supported by NSFC (Nos. 61671019, 61271156) and the research project for university personnel returning from overseas sponsored by the Ministry of Education of China.
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Chu, X., Dai, P., Dong, Y. et al. The acetic acid gas sensing properties of graphene quantum dots (GQDs)–ZnO nanocomposites prepared by hydrothermal method. J Mater Sci: Mater Electron 28, 19164–19173 (2017). https://doi.org/10.1007/s10854-017-7873-7
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DOI: https://doi.org/10.1007/s10854-017-7873-7