کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7141173 | 1462029 | 2018 | 37 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
H2S sensing characteristics of Ni-doped CaCu3Ti4O12 films synthesized by a sol-gel method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: H2S sensing characteristics of Ni-doped CaCu3Ti4O12 films synthesized by a sol-gel method H2S sensing characteristics of Ni-doped CaCu3Ti4O12 films synthesized by a sol-gel method](/preview/png/7141173.png)
چکیده انگلیسی
The problem of detecting the toxic hydrogen sulfide (H2S) gas at part per million levels in air by means of simple solid state gas sensors is relevant to environmental and gas processing industries. In this work, high-performance H2S gas sensors are developed based on nickel-doped calcium copper titanate (Ni-doped CCTO) thin films synthesized by a sol-gel method. From gas-sensing measurements, the response of Ni-doped CCTO sensing films increased substantially with increasing Ni doping level from 1.5 to 7.3â¯wt%, revealing a catalytic effect of Ni on the surface reactions with adsorbed H2S molecules. In particular, 7.3â¯wt% Ni-doped CCTO sensors offered a high response of 120 for 10â¯ppm of H2S at the optimal operating temperature of 250â¯Â°C, an order of magnitude higher than that of undoped one. In addition, the response time dropped significantly from â¼80â¯s to â¼4â¯s while the recovery time slightly improved as the Ni doping content increased from 0 to 7.3â¯wt%. Moreover, the Ni-doped CCTO sensors exhibited good reproducibility and high H2S selectivity against ethanol, H2, NO2 and NH3. Therefore, the Ni-doped CCTO sensors are highly promising for sensitive and selective detections of H2S.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 260, 1 May 2018, Pages 877-887
Journal: Sensors and Actuators B: Chemical - Volume 260, 1 May 2018, Pages 877-887
نویسندگان
Arisara Boontum, Ditsayut Phokharatkul, Jose H. Hodak, Anurat Wisitsoraat, Satreerat K. Hodak,