Abstract
Au/Y-ZnO composite with excellent acetone sensing was successfully prepared by a facile wet chemical method. X-ray diffraction analysis, field-emission scanning microscopy, and transmission electron microscopy investigation revealed that the obtained Au/Y-ZnO was mainly composed of ZnO wurtzite phase and Au nanoparticles with a face-centered structure in diameter of 10 nm, and Y atom replaced Zn lattice sites to form yttria phase. Compared with the pure ZnO and Y-doped ZnO, the Au/Y-ZnO-based sensor shows significantly enhanced acetone gas sensing. Its response to 100 ppm acetone is 27.6, which is about 2.3 and 5.5 times that of the Y-ZnO and the pure ZnO, respectively. The Au/Y-ZnO-based sensor has a low detection limit (1 ppm), and fast response (3 s) and recovery (9 s). Au modification can obviously decrease the operating temperature (275°C). The enhanced gas-sensing of Au/Y-ZnO towards acetone can be ascribed to YZn and V −Zn defects, the Schottky barrier between Au nanoparticles and Y-doped ZnO, and the catalytic activity of the Au nanoparticles.
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The work is supported by the Fundamental Research Funds for the Central Universities (no. 201916).
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Li, Y., Zhang, LB., Song, S. et al. Enhanced Acetone-Sensing Performance of Au/Y-ZnO Composite Prepared Using a Facile Wet Chemical Method. J. Electron. Mater. 49, 4945–4951 (2020). https://doi.org/10.1007/s11664-020-08227-2
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DOI: https://doi.org/10.1007/s11664-020-08227-2