纳米复合材料
三氧化钨
丙酮
材料科学
石墨烯
钨酸盐
水合物
钨
化学工程
纳米技术
纳米颗粒
氧化物
无机化学
化学
冶金
有机化学
工程类
作者
Shibin Sun,Xing Xiong,Jingang Han,Xueting Chang,Nannan Wang,Mingwei Wang,Yanhua Lei,Tao Liu,Yanqiu Zhu
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2019-02-26
被引量:10
标识
DOI:10.1021/acsanm.8b02185
摘要
The development of miniaturized, low-cost, and high-performance acetone gas sensors is highly desirable for workshop safety management and human health diagnosis. Herein, we present a portable integrated system for real-time detection of acetone concentration based on a novel 2D/2D nanocomposite of tungsten oxide hydrate (WO3·H2O) nanoplates and graphene nanoplatelets (GNPs). The GNP-WO3·H2O nanocomposites were first synthesized using a precipitation process at room temperature with sodium tungstate dihydrate as the precursor and GNP as the template. At low GNP content (0.5 and 1.0 wt %), the GNP-WO3·H2O nanocomposites exhibited superior sensitivities to the pure WO3·H2O nanoplates. The GNP-WO3·H2O nanocomposite with 1.0 wt % GNP addition could deliver a sensitivity of 6.7 toward 5 ppm acetone, with a fast response time of 7 s. After annealing at 200–400 °C, the acetone-sensing performance of both the WO3·H2O nanoplates and GNP-WO3·H2O nanocomposites were obviously deteriorated, which can be attributed to...
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