作者
L Giancaterini, SM Emamjomeh, A De Marcellis, E Palange, Alessandro Resmini, Umberto Anselmi-Tamburini, C Cantalini
发表日期
2016/6/28
期刊
Sensors and Actuators B: Chemical
卷号
229
页码范围
387-395
出版商
Elsevier
简介
The paper reports on the influence of visible light at different wavelengths (red, λ = 630 nm; green, λ = 570 nm; purple–blue, λ = 430 nm), light irradiance conditions (from 30 to 770 μW/cm2) and operating temperatures (from 25 °C to 100 °C) on the electrical response of WO3 electrospun nanofibers (NFs) to 100–400 ppb NO2 gas in dry air. WO3 NFs were prepared by mixing a W–O sol–gel transparent solution (WCl6 in ethanol) with a polymeric solution made of polyvinylpyrrolidone (PVP) and dimethylformamide (DMF). Electrospun NFs were annealed between 300 °C and 500 °C and the their microstructures features investigated by SEM and XRD. Room temperature (25 °C) gas responses of the 450 °C annealed NFs have shown that, beside a slight reduction of the relative gas response (RRs), a decrease of the light wavelength (toward the purple–blue) and an increase of its irradiance, greatly improve the base …
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L Giancaterini, SM Emamjomeh, A De Marcellis… - Sensors and Actuators B: Chemical, 2016