丙酮
多孔性
尖晶石
材料科学
催化作用
检出限
选择性
化学工程
甲醛
纳米技术
化学
色谱法
有机化学
复合材料
工程类
冶金
作者
Sufang Zhang,Wenhao Jiang,Yiwen Li,Xueli Yang,Peng Sun,Fangmeng Liu,Xu Yan,Yuan Gao,Xishuang Liang,Jian Ma,Geyu Lu
标识
DOI:10.1016/j.snb.2019.04.090
摘要
Spinel-type oxides have attracted a broad interest in sensing materials research owing to their high catalytic activity and flexibly tunable chemical properties. Here, we report the synthesis of superfine porous NiFe2O4 microspheres by one-step solvothermal approach, in order to fabricate ultra-sensitive acetone sensors for real-time monitoring, relying on the high catalytic activity of NiFe2O4 and effective mass transfer property of porous microspheres structure. The porous NiFe2O4 sensors displayed high selectivity to acetone against other interfering gases, giving a high sensitivity (27.4), fast response time (2 s) towards 100 ppm acetone and low detection limit (200 ppb) at 250 °C. This paper proposed a general approach for fabricating highly sensitive gas sensor based on spinel-type oxides in monitoring volatile organic pollutants.
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