纳米复合材料
甲醇
二氧化锡
材料科学
氧化锡
选择性
溅射
灵敏度(控制系统)
分析化学(期刊)
锌
化学工程
纳米颗粒
薄膜
纳米技术
氧化物
化学
电子工程
色谱法
催化作用
冶金
有机化学
工程类
作者
Enobong Bassey,Philip Sallis,K. Prasad
标识
DOI:10.1002/9781119263722.ch35
摘要
This research reports on the sensing behavior of a nanocomposite of tin dioxide (SnO2) and zinc oxide (ZnO). SnO2-ZnO nanocomposites were fabricated into sensor devices by the radio frequency sputtering method, and used for the characterization of thesensitivity behavior of methanol vapor. The sensor devices were subjected to methanol concentration of 200 ppm at operating temperatures of 150, 250 and 350 °C. A fractional difference model was used to normalize the sensor response, and determine the sensitivity of methanol on the sensor. Response analysis of the SnO2-ZnO sensors to the methanol was most sensitive at 350 °C, followed by 250 and 150 °C. Supported by the morphology (FE-SEM, AFM) analyses of the thin films, the sensitivity behavior confirmed that the nanoparticles of coupled SnO2 and ZnO nanocomposites can promote the charge transportation, and be used to fine-tune the sensitivity of methanol and sensor selectivity to a desired target gas.
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