کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
741904 1462081 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A sensitive electrochemical sensor with sulfonated graphene sheets/oxygen-functionalized multi-walled carbon nanotubes modified electrode for the detection of clenbuterol
ترجمه فارسی عنوان
یک سنسور الکتروشیمی حساس با ورق گرافن سولفونده / الکترود اصلاح شده نانولوله های کربنی چند هسته ای برای تشخیص کلنبوترول
کلمات کلیدی
ورق گرافن سولفات شده، نانولوله های کربن چندسازه ای اکسیژن، کلنبوترول، نانومواد هیبرید، الکتروکاتالیست
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• A hybrid nanomaterial comprising sulfonated graphene sheets and oxygen-functionalized multi-walled carbon nanotubes modified glass carbon electrode was fabricated and characterized.
• Direct electrochemistry of clenbuterol was realized on the modified electrode.
• Under optimized conditions, common ions, uric acid, terbutaline and salbutamol did not interfere with the electrode activity.
• The modified electrode exhibited good sensitivity, reproducibility and stability.
• SGSs and MWCNTs-COOH had synergistic effects on the determination of clenbuterol.

A novel electrochemical sensor was designed to determine clenbuterol by using a new hybrid nanomaterials of water-dispersible sulfonated graphene sheets (SGSs) and oxygen-functionalized multi-walled carbon nanotubes (MWCNTs-COOH) modified glass carbon electrode (GCE). The π–π stacking interaction between SGSs and MWCNTs-COOH was verified by UV–vis spectroscopy, fourier transform-infrared spectroscopy and scanning electron microscopy. The anodic peak current (Ipa) of clenbuterol at the GCE modified with SGSs/MWCNTs-COOH was much higher than those at the bare GCE, SGSs/GCE and MWCNTs-COOH/GCE due to the synergistic effect of the modified nanomaterials. Differential pulse voltammetry disclosed a good linear relationship between Ipa and concentrations of clenbuterol (0.01–5.0 μM), with the detection limit of 4.6 nM. Finally, the modified electrode was successfully used to determine clenbuterol in liver samples.

A sensitive electrochemical sensor with sulfonated graphene sheets/oxygen-functionalized multi-walled carbon nanotubes modified glass carbon electrode (SGSs/MWCNTs-COOH/GCE) was prepared and thoroughly characterized by ultraviolet-visible (UV–vis), Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The obtained hybrid nanomaterials modified electrode was acted as a platform for the determination of clenbuterol in liver. The results indicated that SGSs and MWCNTs-COOH had synergistic effects for the determination of clenbuterol and the modified electrode showed advantages including high anti-interference ability, low detection limit and wide linearity range compared with the others working electrode, and significantly enhanced the oxidation peak currents of clenbuterol. Hence, the results demonstrated that the SGSs/MWCNTs-COOH/GCE can be applied for the detection of clenbuterol in real sample.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 210, April 2015, Pages 483–490
نویسندگان
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