Facile Fabrication of Au Nanoparticles/Tin Oxide/Reduced Graphene Oxide Ternary Nanocomposite and Its High-Performance SF Decomposition Components Sensing.

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2019
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Abstract
A high-performance sensor for detecting SF decomposition components (HS and SOF) was fabricated via hydrothermal method using Au nanoparticles/tin oxide/reduced graphene oxide (AuNPs-SnO-reduced graphene oxide [rGO]) hybrid nanomaterials. The sensor has gas-sensing properties that responded and recovered rapidly at a relatively low operating temperature. The structure and micromorphology of the prepared materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), Raman spectroscopy, energy-dispersive spectroscopy (EDS), and Brunauer-Emmett-Teller (BET). The gas-sensing properties of AuNPs-SnO-rGO hybrid materials were studied by exposure to target gases. Results showed that AuNPs-SnO-rGO sensors had desirable response/recovery time. Compared with pure rGO (210/452 s, 396/748 s) and SnO/rGO (308/448 s, 302/467 s), the response/recovery time ratios of AuNPs-SnO-rGO sensors for 50 ppm HS and 50 ppm SOF at 110°C were 26/35 s and 41/68 s, respectively. Furthermore, the two direction-resistance changes of the AuNPs-SnO-rGO sensor when exposed to HS and SOF gas made this sensor a suitable candidate for selective detection of SF decomposition components. The enhanced sensing performance can be attributed to the heterojunctions with the highly conductive graphene, SnO films and Au nanoparticles.
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Authors Pi, Shoumiao;Zhang, Xiaoxing;Cui, Hao;Chen, Dachang;Zhang, Guozhi;Xiao, Song;Tang, Ju;
Journal Frontiers in chemistry
Year 2019
DOI
10.3389/fchem.2019.00476
URL
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