摘要
In order to detect low concentrations of volatile organic compounds (VOCs) for the early diagnosis of lung cancer, sensors based on hollow spheres of In_(2)O_(3) were prepared through the soft template method. Ag nanoparticle decorated In_(2)O_(3) composites were synthesized via dipping and annealing. The microstructure, phase composition, element distribution, and state of Ag were analyzed by the scanning electron microscopy (SEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS). The gas sensing tests showed that Ag-In_(2)O_(3) sensors had the highest response to isopropanol at 300 ℃. The best response of Ag-In_(2)O_(3) composite sensor was 5.2, which had a significant improvement compared with only In_(2)O_(3). Moreover, the response and recovery time of Ag-In_(2)O_(3) composite sensor was significantly shortened. The improved sensing properties of Ag-In_(2)O_(3) composite sensor could be attributed to the Schottky barrier created at Ag-In_(2)O_(3) interface and catalytical effect of Ag.
基金
This work is supported by the National Natural Science Foundation of China(No.51872254)
the National Key R&D Program of China(No.2017YFE0115900)
the Outstanding Youth Foundation of Jiangsu Province of China(No.BK20211548)
The authors also thank the European Regional Development Fund(ERDF)and the Walloon Region of Belgium through the Interreg V France-Wallonie-Vlaanderen program,PATHACOV project(No.1.1.297)
the Micro project co-funded by the European Regional Development Fund(ERDF),and Wallonia,Belgium(No.675781-642409)
This work is also supported by the CommunautéWallonie-Bruxelles via the WBI-MOST-China(No.SUB/2019/430254).
