کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7147701 | 1462098 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical impedance spectroscopy study of Ta2O5 based EIOS pH sensors in acid environment
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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: Electrochemical impedance spectroscopy study of Ta2O5 based EIOS pH sensors in acid environment Electrochemical impedance spectroscopy study of Ta2O5 based EIOS pH sensors in acid environment](/preview/png/7147701.png)
چکیده انگلیسی
To develop an on-line pH sensor for acidic environment application, a tantalum pentoxide (Ta2O5) based electrolyte-ion sensitive membrane-oxide-semiconductor (EIOS) pH sensor has been prepared and investigated by applying electrochemical impedance spectroscopy (EIS) and capacitance-voltage method (C-V). Nernstian behavior toward variable proton concentrations (â¼56.19Â mV/pH) in the pH range from 1 to 10 could be achieved. Atomic force microscopic (AFM) showed that the surface of the H+ sensitive Ta2O5 film was uniform and smooth. Electrochemical impedance spectroscopy (EIS) revealed that the space charge capacitance easily distinguish pH changes. Possible interference from Cu2+, Fe2+ and Fe3+ were studied in pH 2.2 solutions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 192, 1 March 2014, Pages 399-405
Journal: Sensors and Actuators B: Chemical - Volume 192, 1 March 2014, Pages 399-405
نویسندگان
Miao Chen, Yan Jin, Xiaohu Qu, Qinghui Jin, Jianlong Zhao,