کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7229469 | 1470923 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dawson-type polyoxometalate nanoclusters confined in a carbon nanotube matrix as efficient redox mediators for enzymatic glucose biofuel cell anodes and glucose biosensors
ترجمه فارسی عنوان
نانوکلاستورهای پلیسکوماتال داوسان در محدوده ی ماتریس نانولوله ی کربنی به عنوان واسطه های بازدارنده ی کارآمد برای آندها یک آنودایز سلولی بیو گرافی و آنزیم های گلوکز و گاوها
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کلمات کلیدی
واسطه الکترون انتقال، پلی ساکنین نوع داوسون، سلول های سوخت زیستی گلوکز، گلوکز دهیدروژناز، نانولوله های کربنی چند ضلعی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Two new inorganic-organic hybrid materials based on heteropolyoxometalates (POMs): (C4H10N)6[P2Mo18O62]·4H2O (P2Mo18) and (C6H8NO)4[H2P2W18O62]·6H2O (P2W18) are reported as mediators for electron transfer between FAD-dependent glucose dehydrogenase (FAD-GDH) and a multiwalled carbon nanotube (MWCNT) matrix for glucose biofuel cell and biosensor applications. These polyoxometalates were chosen due to their promising redox behavior in a potential range for mediated electron transfer with the glucose oxidizing enzyme, FAD-GDH. P2Mo18 and P2W18 were immobilized on 1-pyrenemethylamine (PMA) functionalized MWCNT deposits. After immobilization of FAD-GDH, the P2W18-modified MWCNT electrode demonstrated mediated electron transfer and provided a catalytic current density of 0.34â¯mAâ¯cmâ2 at 0.2â¯V vs SCE with an open circuit potential (OCP) of â0.08â¯V vs SCE. A 10-fold increase in catalytic current to 4.7â¯mAâ¯cmâ2 at 0.2â¯V vs SCE and a slightly lower OCP of â0.10â¯V vs SCE was observed for an equivalent electrode modified with P2Mo18.The apparent superiority of P2Mo18 is related, at least in part, to its improved incorporation in the MWCNT matrix compared to P2W18. Both POM-modified bioanodes showed exceptional stabilities with 45% of their initial performances remaining after 15 days. The mediated electron transfer capacities of the POMs were also evaluated in a glucose sensor setup and showed very satisfying performances for glucose detection, including a sensitivity of 0.198â¯mAâ¯molâ¯Lâ1 cmâ2, a satisfying linear range between 1â¯mmolâ¯Lâ1 and 20â¯mmolâ¯Lâ1, and good reproducibility for the P2Mo18 electrode.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 109, 30 June 2018, Pages 20-26
Journal: Biosensors and Bioelectronics - Volume 109, 30 June 2018, Pages 20-26
نویسندگان
Feriel Boussema, Andrew J. Gross, Fatma Hmida, Brahim Ayed, Hatem Majdoub, Serge Cosnier, Abderrazak Maaref, Michael Holzinger,