NO2 sensing performance of SnO2 hollow-sphere sensor

NO2 sensing performance of SnO2 hollow-sphere sensor
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SnO2空心球传感器的NO2传感性能

DOI:
10.1016/j.snb.2008.09.026
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发表时间:
2009-01
影响因子:
8.4
通讯作者:
--
中科院分区:
化学1区
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--
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本文研究了利用SnO2空心球和碳微球作为介质对NO2气体进行高效检测的可能性。综合研究了气体浓度、工作温度、微晶(晶粒)尺寸和结构特征对SnO2空心球传感器传感性能的影响。在450、500和550°C下煅烧所得SnO2空心球的平均晶粒尺寸分别为12.7、14.1和22.8nm。结果表明,在450°C下煅烧的SnO_2空心球对NO_2气体的敏感性最好,其晶粒尺寸为12.7nm。在160°C下,该传感器对NO2的选择性优于对乙醇、甲醇、汽油、丙酮、四氯化碳和氨水的选择性。
This work examined the possibility of using SnO2hollow spheres mediated by carbon microspheres for the efficient detection of NO2gas. The influences of gas concentration, operating temperature, crystallite (grain) size and structure feature on the sensing performance of the sensors based on SnO2hollow spheres were comprehensively studied. The SnO2hollow spheres had a mean crystallite size of 12.7, 14.1 and 22.8nm when calcined at 450, 500 and 550°C, respectively. It was found that the SnO2hollow spheres calcined at 450°C with a crystallite size of 12.7nm were the most sensitive to NO2gas. The sensor also had a better selectivity to NO2than to ethanol, methanol, gasoline, acetone, CCl4and NH3when operated at 160°C.
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发表时间: 2004-01-01
影响因子: 16.6
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