کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
750476 1462067 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly sensitive and selective acetone sensing performance of WO3 nanofibers functionalized by Rh2O3 nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Highly sensitive and selective acetone sensing performance of WO3 nanofibers functionalized by Rh2O3 nanoparticles
چکیده انگلیسی

In this work, catalytic Rh2O3-functionalized WO3 nanofibers (NFs) were synthesized via an electrospinning route and used as a highly selective acetone-sensing layer for potential diagnosis of diabetes. Catalytic rhodium nanoparticles (Rh NPs) with average diameters of 5.0 ± 0.52 nm, which were synthesized by the polyol process, were dispersed in water with W precursor and poly(vinylpyrrolidone) (PVP) for electrospinning. As-spun Rh NP-loaded W precursor/PVP composite NFs were calcined at 600 °C for 1 h in air atmosphere to achieve Rh2O3-decorated WO3 NFs. Microstructure evolution and chemical composition of Rh2O3-decorated WO3 NFs as a function of Rh-loading amounts, i.e., 0.01 wt%, 0.05 wt%, 0.10 wt%, and 0.15 wt%, were examined using energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and high-resolution transmission electron microscopy (HRTEM). The mean size (30 nm) of the WO3 crystallites in Rh2O3-decorated WO3 NFs was much smaller than that (60 nm) of the WO3 crystallites in pristine WO3 NFs. The Rh2O3-decorated WO3 NFs showed outstanding acetone (CH3COCH3) sensing response (Rair/Rgas = 41.2 to 5 ppm), which was 4.6 times higher than the response (Rair/Rgas = 9.0 to 5 ppm) of pristine WO3 NFs at highly humid atmosphere (95% RH). In addition, superior acetone cross-sensitivity of the Rh2O3-decorated WO3 NFs was observed in other interfering gases such as pentane (n-C5H12), ammonia (NH3), toluene (C6H5CH3), carbon monoxide (CO), and ethanol (C2H5OH) at 5 ppm. These results are highly promising for the accurate and selective detection of acetone in exhaled breath for potential diagnosis of diabetes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 224, 1 March 2016, Pages 185–192
نویسندگان
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