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Gas sensing behavior of nanostructured sensors based on tin oxide synthesized with different methods

机译:基于不同方法合成的氧化锡纳米结构传感器的气敏行为

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摘要

Tin oxide, SnO_2 nanomaterials fabricated by chemical precipitation (CP), sol-gel (SG), and dissolution pyrolysis (DP) are characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The gas sensing properties of tin oxide nanomaterials prepared by CP, SG and DP methods have been studied. The results show that tin oxide nanopowders produced from three above-mentioned methods have tetragonal rutile structure and the mean size of particles are less than 30 nm. The results obtained from SEM show that tin oxide thick films (produced from the synthesized nanopowders) coated onto alumina substrates have different morphology and tin oxide thick films fabricated through DP method has porous structure. By the results obtained from the gas sensing behavior, the gas sensor based on tin oxide prepared by DP method has high sensitivity, excellent selectivity, quick response and recovery behavior to gases investigated compared with those fabricated by the other two methods.
机译:利用X射线衍射,扫描电子显微镜和透射电子显微镜对氧化锡,化学沉淀法(CP),溶胶-凝胶法(SG)和溶解热解法(DP)制备的SnO_2纳米材料进行了表征。研究了用CP,SG和DP方法制备的氧化锡纳米材料的气敏特性。结果表明,上述三种方法制得的氧化锡纳米粉具有四方金红石结构,平均粒径小于30 nm。由SEM得到的结果表明,涂​​覆在氧化铝基底上的氧化锡厚膜(由合成的纳米粉末生产)具有不同的形态,并且通过DP法制备的氧化锡厚膜具有多孔结构。从气体感应行为获得的结果来看,与其他两种方法制造的气体相比,通过DP法制备的基于氧化锡的气体传感器具有较高的灵敏度,优异的选择性,对被调查气体的快速响应和恢复行为。

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