کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6616894 | 459625 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and electrochemical performances of layered tungsten sulfide-graphene nanocomposite as a sensing platform for catechol, resorcinol and hydroquinone
ترجمه فارسی عنوان
سنتز و عملکرد الکتروشیمیایی نانوکامپوزیت تنگستن سولفید گرافن به عنوان یک پلت فرم حساس برای کاتچول، رزورسینول و هیدروکینون
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کلمات کلیدی
نانوکامپوزیت های تنگستن سولفید گرافن لایه ای، کاتچول، رزورسینول، هیدروکینون، تعیین همزمان،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The Layered tungsten sulfide (WS2)-graphene (Gr) composites were prepared by a facile l-cysteine-assisted solution-phase method. Field emission scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations showed that layered WS2 nanosheets were highly wrapped in the creasy Gr. The electrochemical properties of the nanocomposite film were investigated by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The as-prepared WS2-Gr composite showed excellent electrochemical catalytic activities toward the oxidation of catechol (CT), resorcinol (RS) and hydroquinone (HQ). The superior electrochemical performances of the composites could be attributed to the robust composite structure and superior conductivity, large surface area and good flexibility of WS2-Gr composites. Some kinetic parameters, such as the electron transfer number (n), charge transfer coefficient (α) and the apparent heterogeneous electron transfer rate constant (ks), were calculated. Differential pulse voltammetry was used for the simultaneous determination of CT, RS and HQ in their ternary mixture. The calibration curves for CT, RS and HQ were obtained in the range of 1 Ã 10â6 to 1 Ã 10â4. The detection limits were 1 Ã 10â7 mol Lâ1 for RS and HQ, and 2 Ã 10â7 mol Lâ1 for CT (S/N = 3). The developed sensor was used to detect CT, RS and HQ in environmental water samples with recoveries of 93.6-104.8%
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 107, 30 September 2013, Pages 379-387
Journal: Electrochimica Acta - Volume 107, 30 September 2013, Pages 379-387
نویسندگان
Ke-Jing Huang, Lan Wang, Yu-Jie Liu, Tian Gan, Yan-Ming Liu, Ling-Ling Wang, Yi Fan,