کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6663769 | 463343 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An electrochemical method for determining the number of carboxyl groups on carbon black
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An electrochemical method for determining the number of carboxyl groups on carbon black An electrochemical method for determining the number of carboxyl groups on carbon black](/preview/png/6663769.png)
چکیده انگلیسی
An easy and sensitive electrochemical method for determining the number of carboxyl groups on carbon black (Vulcan XC 72R) was developed. This involves the modification of carboxyl groups on Vulcan XC 72R with an electrochemically active reagent (3,4-dihydroxybenzylamine) in the presence of a carbodiimide. The amount of reagent immobilized on a carboxyl group of Vulcan XC 72R was determined by cyclic voltammetry. Separation of the covalently bonded and physically adsorbed 3,4-dihydroxybenzylamine molecules is important. For this purpose, treatment with 3,4-dihydroxybenzylamine but without carbodiimide was performed, and the results were compared with those with the carbodiimide. This comparison can be used to assess the influence of the physical adsorption of 3,4-dihydroxylbenzylamine, and the number of molecules covalently bonded to carboxyl group can be determined quantitatively. Unoxidized and air-oxidized Vulcan XC 72R were evaluated with regard to the number of carboxyl groups per surface area. The effect of oxidation on the number of carboxyl groups is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 616, Issues 1â2, 1 May 2008, Pages 64-70
Journal: Journal of Electroanalytical Chemistry - Volume 616, Issues 1â2, 1 May 2008, Pages 64-70
نویسندگان
Shin-ichi Yamazaki, Zyun Siroma, Tsutomu Ioroi, Kazuaki Yasuda, Kazumi Tanimoto,