کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5010084 1462050 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Use of single-crystalline Bi2S3 nanowires as room temperature ethanol sensor synthesized by hydrothermal approach
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Use of single-crystalline Bi2S3 nanowires as room temperature ethanol sensor synthesized by hydrothermal approach
چکیده انگلیسی
A facile and effective procedure for the synthesis of bismuth sulfide (Bi2S3) nanowires is reported in which thiourea is used as source of sulfur ions and precisely controlled to release sulfur ions for the formation of Bi2S3 nanowires without any surfactant and template. The as-synthesized products are characterized by X-ray diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, selected area electron diffraction, X-ray photoelectron spectroscopy, and UV-vis absorption, respectively. The results indicated the as-fabricated specimens are high purity and single-crystal Bi2S3 nanowires with a diameter range from 50 to 100 nm. For a comparative study, both ethanol gas responses of Bi2S3 nanowires and conventional powders are investigated by means of the surface photovoltage technique at different temperatures. Unexpectedly, at room temperature, the as-obtained results demonstrate the response of Bi2S3 nanowires is 2 times higher than that of Bi2S3 conventional powders even if the concentration of ethanol is down to 10 ppm, showing a superior response to ethanol vapors and good stability, which indicates potential applications for room-temperature nanosensors, including ethanol alarms, ethanol flowmeters, and ethanol detectors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 241, 31 March 2017, Pages 210-216
نویسندگان
, , , , ,