NO2 sensing properties of flame-made MnOx-loaded ZnO-nanoparticle thick film
作者： N. Tamaekong , C. Liewhiran , A. Wisitsoraat , A. Tuantranont , S. Phanichphant
DOI: 10.1016/J.SNB.2014.07.089
关键词: Materials science 、 Thermal spraying 、 Solid-state chemistry 、 Zno nanoparticles 、 Nanoparticle 、 Pyrolysis 、 Specific surface area 、 Nanotechnology 、 Crystallite 、 Chemical engineering 、 Selectivity
摘要: Abstract In this work, unloaded and 0.25–1.00 mol% MnOx-loaded ZnO nanoparticles synthesized by a single step flame spray pyrolysis are systematically investigated for NO2 sensing. Structural characterizations revealed hexagonal-phase polycrystalline with nominal diameter of 5–15 nm were uniformly decorated ultra fine MnOx 0.5–2 nm in diameter. addition, it was found that specific surface area increased the average decreased monotonically increasing concentration from 0 to 1.0 mol%. Gas sensing studies clearly demonstrated loading on led significant enhancement performances terms response selectivity. The optimum be 0.25 mol% sensor exhibited high ∼2700 50 ppm dry air at 350 °C. good selectivity against NH3 H2S gases.
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