کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
744551 894393 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A nano-copper electrochemical sensor for sensitive detection of chemical oxygen demand
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
A nano-copper electrochemical sensor for sensitive detection of chemical oxygen demand
چکیده انگلیسی

Copper nanoparticle (nano-Cu) was electrodeposited on the surface of Cu disk electrode under −1 V for 60 s, and then used to construct an electrochemical sensor for chemical oxygen demand (COD). The electrochemical oxidation behavior of glycine, a standard compound for evaluating the COD, was investigated. The potential shifts negatively, and the current increases greatly at the surface of nano-Cu, indicating remarkable enhancement effect on the detection of COD. The analytical conditions such as electrolyte, deposition potential, deposition time and detected potential were studied. As a result, a sensitive, simple and rapid electroanalytical method was developed for COD using amperometric detection. The linear range is from 4.8 to 600 mg L−1, and the limit of detection is as low as 3.6 mg L−1. Moreover, this method exhibits high tolerance level to chloride ion, and 0.02 M chloride ion has no influence. Finally, the sensor was used to detect the COD values of different water samples, and the results were testified by the standard dichromate method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 153, Issue 1, 31 March 2011, Pages 78–82
نویسندگان
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