کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7142406 | 1462053 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly sensitive gasochromic H2 sensing by nano-columnar WO3-Pd films with surface moisture
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Highly sensitive gasochromic H2 sensing by nano-columnar WO3-Pd films with surface moisture Highly sensitive gasochromic H2 sensing by nano-columnar WO3-Pd films with surface moisture](/preview/png/7142406.png)
چکیده انگلیسی
H2 is a fuel with advantages that include being recyclable, abundant, and environmentally friendly. It has been intensively studied as an attractive renewable energy carrier. However, H2 detection is a necessary safety concern, because the fuel is explosive at concentrations above 4% in air. In this study, a very sensitive and reliable visual gasochromic H2 sensor is fabricated by vacuum deposition for detecting H2 gas leaks by a simple change of colour. A thin amorphous and nanoporous WO3 film was deposited on a glass substrate by RF sputtering, and palladium nanoparticles prepared by e-beam evaporation were used as a catalyst to decompose H2 molecules. We have characterized the structural, optical, and chemical properties of the nanohybrid Pd-WO3 sensor. The sensor exhibited excellent gasochromic performance upon exposure to 1% H2 in air with a transmittance change of >50% and a colour difference (ÎE) of 52 after 10Â min exposure. All fabrication was done at room temperature, and the development of a flexible sensor is described.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 238, January 2017, Pages 111-119
Journal: Sensors and Actuators B: Chemical - Volume 238, January 2017, Pages 111-119
نویسندگان
Young-Ahn Lee, Shankara S. Kalanur, Gowoon Shim, Jucheol Park, Hyungtak Seo,