The selective detection of C2H5OH using SnO2-ZnO thin film gas sensors prepared by combinatorial solution deposition
The selective detection of C2H5OH using SnO2-ZnO thin film gas sensors prepared by combinatorial solution deposition
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DOI：
10.1016/j.snb.2006.08.028
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发表时间：
2007-04-10
影响因子：
8.4
通讯作者：
Yoon, Seok-Jin
中科院分区：
文献类型：
--
作者：
Kim, Ki-Won;Cho, Pyeong-Seok;Yoon, Seok-Jin
采用SnO2-ZnO薄膜的组合溶液沉积方法，设计了选择性检测C2H5OH的传感材料。S50Z50传感器在300℃时对200ppm的C2H5OH(S(乙醇)=R-a/R-g=4.69，R-a：空气中的电阻，R_1：气体中的电阻)有很高的响应，而对100ppm的C3H8、100ppm的CO、200ppm的H-2和5ppm的NO2的气体响应在1.11到1.19之间。S50Z50传感器的S(乙醇)值是200ppm CH3COCH3(S(丙酮))的两倍。相比之下，纯氧化锡和氧化锌薄膜的S(乙醇)和S(丙酮)的成分相似。SnO2和ZnO之间的异质结构被认为是成功区分C2H5OH和CH3COCH3的可能原因之一。(C)2006爱思唯尔B.V.保留所有权利。
Sensing materials for selective detection of C2H5OH were designed using combinatorial solution deposition of SnO2-ZnO thin films. The SnO2-ZnO composite sensor prepared by alternate deposition of 10 droplets of SnO2 and ZnO sols (S50Z50 sensor) showed a high response to 200ppm C2H5OH (S(ethanol) = R-a/R-g = 4.69, R-a: resistance in air, R,: resistance in gas) at 300 degrees C, while the gas responses to 100 ppm C3H8, 100 ppm CO, 200 ppm H-2, and 5 ppm NO2 ranged from 1.11 to 1.19. The S(ethanol) value of the S50Z50 sensor was twice that to 200 ppm CH3COCH3 (S(acetone)). In contrast, the S(ethanol) and S(acetone) of pure SnO2 and ZnO thin films were similar to each other. The heterostructure between SnO2 and ZnO was suggested as one of the probable reasons for the successful discrimination between C2H5OH and CH3COCH3. (c) 2006 Elsevier B.V. All rights reserved.