Highly sensitive hydrogen sensors based on SnO2 nanomaterials with different morphologies
Highly sensitive hydrogen sensors based on SnO2 nanomaterials with different morphologies
复制标题
基于不同形貌SnO2纳米材料的高灵敏氢传感器
DOI：
10.1016/j.ijhydene.2015.09.077
复制
发表时间：
2015-12-07
影响因子：
7.2
通讯作者：
San, Xiaoguang
中科院分区：
文献类型：
--
作者：
Shen, Yanbai;Wang, Wei;San, Xiaoguang
采用溅射和热蒸发方法制备了纳米薄膜、纳米棒、纳米线等不同形貌的SnO2纳米材料。并对其氢敏特性进行了研究。结构表征表明，这些纳米材料中的SnO2为四方相。纳米膜、纳米棒和纳米线的比表面积增大，有效表面积增大。基于这些SnO2纳米材料的气体传感器对不同浓度的氢气表现出可逆的响应。当峰值工作温度从250℃降低到150℃时，纳米膜、纳米棒和纳米线的响应有序性增强，响应或恢复时间变短。结果表明，随着SnO2纳米材料有效比表面积的增大，传感器的响应有效增加，表明通过改变纳米材料的形貌可以显著改善其气敏性能。版权所有(C)2015，氢能源出版有限责任公司。爱思唯尔有限公司出版。保留所有权利。
SnO2 nanomaterials with different morphologies, such as nanofilms, nanorods, and nanowires, were fabricated by sputtering and thermal evaporation methods. Their hydrogen sensing properties were then investigated. The structural characterizations showed that the SnO2 in these nanomaterials was tetragonal. The surface-to-volume ratio of the nanofilms, nanorods, and nanowires increased, leading to an increase in the effective surface area. Gas sensors based on these SnO2 nanomaterials showed a reversible response to hydrogen at various concentrations. The response order of the nanofilms, nanorods and nanowires was enhanced while the peak operating temperature was decreased from 250 to 150 degrees C, and the response or recovery time became shorter. The results indicated that the sensor response effectively increased as the effective surface area of the SnO2 nanomaterials increased, demonstrating that gas-sensing properties could be significantly improved by changing the nanomaterial morphology. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.