Pt-doped In2O3 nanoparticles prepared by flame spray pyrolysis for NO2 sensing
作者： K. Inyawilert , D. Channei , N. Tamaekong , C. Liewhiran , A. Wisitsoraat
DOI: 10.1007/S11051-016-3341-1
关键词:
摘要: Undoped In2O3 and 0.25–1.00 wt% M (M=Pt, Nb, Ru)-doped/loaded nanoparticles were successfully synthesized in a single-step flame spray pyrolysis technique using indium nitrate, platinum (II) acetylacetonate, niobium ethoxide, ruthenium (III) acetylacetonate precursors. The undoped M-doped characterized by Brunauer–Emmett–Teller (BET) analysis, X-ray diffraction (XRD), scanning transmission electron microscopy (SEM & TEM). BET average diameter of spherical was found to be the range 10.2–15.2 nm under 5/5 (precursor/oxygen) conditions. All XRD peaks confirmed correspond cubic structure In2O3. TEM images showed that there is no Pt nanoparticle loaded on surface, suggesting should form solid solution with lattice. Gas sensing studies 0.5 wt% doping gave significant enhancement NO2 performances terms sensor response selectivity. Pt/In2O3 exhibited high ~1904 5 ppm at 250 °C good selectivity against NO, H2S, H2, C2H5OH. In contrast, Nb Ru loading resulted deteriorated response. Therefore, demonstrated an effective additive enhance In2O3-based sensors.
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