Highly sensitive gallia-SnO2 nanocomposite sensors to CO and ethanol in presence of methane
Highly sensitive gallia-SnO2 nanocomposite sensors to CO and ethanol in presence of methane
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DOI：
10.1016/j.snb.2013.06.069
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发表时间：
2013-11-01
影响因子：
8.4
通讯作者：
Mortazavi, Yadollah
中科院分区：
文献类型：
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作者：
Bagheri, Minoo;Khodadadi, Abbas Ali;Mortazavi, Yadollah
研究了在500-850 ℃煅烧的含0- 50wt%Ga_2 O_3的镓-SnO_2纳米复合材料传感器对CO、甲烷和乙醇的响应。以SnCl_2和Ga（NO_3）_3为原料，采用共沉淀法制备了Ga（NO_3）_2-SnO_2纳米粉体，并通过XRD、EDX、TEM、PL和BET比表面积等手段对样品进行了表征。样品含有高达25重量%的镓，并在500 ℃下煅烧表明，只有四方金红石结构的SnO 2形成。对于含有50wt%Ga2O3并分别在850和1050 ℃下煅烧的样品，观察到Ga 4SnO 8和β-Ga 2 O3相。随着镓含量从0增加到25wt%，纳米复合材料的平均粒径从21.6 nm逐渐减小到6.7 nm。315和119的最高响应观察到300 ppm的CO和乙醇的传感器含有5和1重量%的Ga 2 O3，分别。含有25wt%的Ga 2 O3在850 ℃煅烧和50wt%的镓在500和850 ℃煅烧的传感器是选择性的CO和乙醇和甲烷显示可忽略不计的响应。(C)2013爱思唯尔有限公司版权所有。
Responses of gallia-SnO2 nanocomposite sensors, containing 0-50 wt% Ga2O3 calcined at 500-850 degrees C, to CO, methane and ethanol are investigated. The gallia-SnO2 samples were prepared via a facile co-precipitation method using stannic chloride and gallium nitrate aqueous solutions without any template and characterized by XRD, EDX, TEM, PL and BET surface area techniques. The samples containing up to 25 wt% gallia and calcined at 500 degrees C indicate that only tetragonal rutile structure of SnO2 is formed. The Ga4SnO8 and beta-Ga2O3 phases are observed for the samples containing 50 wt% Ga2O3 and calcined at 850 and 1050 degrees C, respectively. The average particle sizes of the nanocomposites gradually decrease from 21.6 to 6.7 nm, as their gallia contents increase from 0 to 25 wt%. The highest responses of 315 and 119 are observed for 300 ppm CO and ethanol by the sensors containing 5 and 1 wt% Ga2O3, respectively. The sensors containing 25 wt% Ga2O3 calcined at 850 degrees C and 50 wt% gallia calcined at 500 and 850 degrees C are selective to CO and show negligible responses to ethanol and methane. (C) 2013 Elsevier B.V. All rights reserved.