One step synthesis of PANI/Fe2O3 nanocomposites and flexible film for enhanced NH3 sensing performance at room temperature

被引：44
作者：
Zhu, Chonghui [1 ]
Cakmak, Umut [2 ]
Sheikhnejad, Ommeaymen [2 ]
Cheng, Xiaoli [1 ]
Zhang, Xianfa [1 ]
Xu, Yingming [1 ]
Gao, Shan [1 ]
Zhao, Hui [1 ]
Major, Zoltan [2 ]
机构：
[1] Heilongjiang Univ, Sch Chem & Mat Sci, Key Lab Funct Inorgan Mat Chem, Minist Educ, Harbin 150080, Peoples R China
[2] Johannes Kepler Univ Linz, Inst Polymer Prod Engn, Linz, Austria
来源：
NANOTECHNOLOGY | 2019年 / 30卷 / 25期
基金：
中国国家自然科学基金; 对外科技合作项目（国际科技项目）;
关键词：
gas sensing; polyaniline; Fe2O3; NH3; flexible substrate; AMMONIA GAS SENSORS; THIN-FILM; POLYANILINE NANOFIBERS; HYDROTHERMAL SYNTHESIS; SENSITIVITY; COMPOSITES; NANOSHEETS;
D O I：
10.1088/1361-6528/ab076e
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Novel sea cucumber-shaped polyaniline/ferric oxide (PANI/Fe2O3) nanocomposites were synthesized using a simple and efficient one step hydrothermal process, and the nanocomposites were further assembled onto a polyethylene terephthalate (PET) flexible substrate. Through the monitoring of the resistance of the PANI/Fe2O3 nanocomposites thick films and PANI/Fe2O3-PET flexible sensors, the responses of the sensors to various 100 ppm gases including methanol, triethylamine, aniline and another five gases were obtained. It was found that two kinds of sensors exhibit a high selectivity towards NH3. The PANI/Fe2O3 nanocomposites-based sensor has a good response and a low detection limit (0.3 ppm) at room temperature (20 +/- 5 degrees C). It also shows a good linearity relationship in a certain concentration of NH3. After assembling into the PANI/Fe2O3-PET flexible film sensor, the response of the sensor is significantly increased to 6.12 for 100 ppm NH3, the detection limit is as low as 0.5 ppm, and the sensor shows good stability and linearity, which is more conducive to the application of such a material in wearable gas sensors.
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页数：7
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