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Synthesis of highly sensitive ammonia gas sensor of polyaniline/graphene nanoribbon/indium oxide composite at room temperature
Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2020-04-02 , DOI: 10.1007/s10854-020-03299-6
Ling-Hui Xu , Tzong-Ming Wu

Indium trioxide (In2O3) nanoparticles prepared using a solvothermal reaction were coated on the surface of graphene nanoribbon (GNR) to serve as a core for the manufacture of polyaniline (PANI)/In2O3/GNR ternary nanocomposites produced using in situ chemical oxidative polymerization. The gas-sensing properties of nanocomposites were evaluated by a homemade dynamic test system at room temperature, which was equipped with a real-time resistance acquisition platform. The response value of the PANI/In2O3/GNR sensor with the loading of 3 wt% In2O3 nanoparticles and an exposure of 4 ppm NH3 was 27.1, which was about 3 or more times higher than that of PANI sensor. This sensor was shown to be very sensitive to the detection of NH3 in the concentration range of 0.65–1.69 ppm at room temperature, which is critical in the detection of hepatic or kidney disease in the human breath. The PANI/In2O3/GNR sensor also revealed higher selectivity and repeatability when exposed to 0.65 ppm NH3 at room temperature. Because of the excellent selectivity and repeatability in the detection of 0.65 ppm NH3 at room temperature obtained in this report, it is believed that the PANI/In2O3/GNR nanocomposites sensor will be a promising gas-sensing material for the detection of hepatic or kidney disease in human breath.



中文翻译:

室温下聚苯胺/石墨烯纳米带/氧化铟复合物高灵敏度氨气传感器的合成

使用溶剂热反应制备的三氧化铟(In 2 O 3)纳米颗粒被涂覆在石墨烯纳米带(GNR)的表面上,用作制造聚苯胺(PANI)/ In 2 O 3 / GNR三元纳米复合材料的核心。原位化学氧化聚合。纳米复合材料的气敏特性通过室温下的自制动态测试系统进行评估,该系统配备了实时电阻采集平台。PANI / In 2 O 3 / GNR传感器在负载3 wt%In 2 O 3纳米颗粒和暴露4 ppm NH 3时的响应值为27.1,比PANI传感器高约3倍或更多。该传感器对室温下浓度范围为0.65-1.69 ppm的NH 3的检测非常敏感,这对于检测人类呼吸中的肝脏或肾脏疾病至关重要。当在室温下暴露于0.65 ppm NH 3时,PANI / In 2 O 3 / GNR传感器也显示出更高的选择性和可重复性。由于本报告中获得的在室温下检测0.65 ppm NH 3的优异选择性和可重复性,可以认为PANI / In 2 O 3/ GNR纳米复合材料传感器将是一种有前途的气体传感材料,可用于检测人类呼吸中的肝脏或肾脏疾病。

更新日期:2020-04-21
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