کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5010059 1462050 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Layer-by-layer electrodeposited nanowall-like palladium-reduced graphene oxide film as a highly-sensitive electrochemical non-enzymatic sensor
ترجمه فارسی عنوان
فیلم برداری اکسید گرافین پلی اتیلن به صورت نانولوله مانند لایه بردار لاک برقی به عنوان یک حسگر الکتروشیمیایی غیر آنزیمی بسیار حساس
کلمات کلیدی
کاهش اکسید گرافین، رسوب الکتروشیمیایی، نانولوله های پالادیوم، آب اکسیژنه، بیوسنسور،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


- Electrodeposition of Palladium nanowall on reduced graphene oxide.
- Support of palladium showed an efficient electrocatalytic performance for biosensor.
- CV curves of palladium nanowall improved in the presence of reduced graphene oxide.
- Agglomeration of reduced graphene oxide has an effect on sensitivity of devices.

Efficient and excellent non-enzymatic electrochemical sensors for H2O2 detection, consisting of reduced graphene oxide (rGO) and palladium (Pd) nanowalls with different rGO loadings, were electrochemically deposited in a layer-by-layer fashion onto indium tin oxide (ITO) glass. The structure and morphology of the as-fabricated non-enzymatic sensor electrodes were confirmed by X-ray diffraction, field-emission electron microscopy, and Raman spectroscopy. The effective combination of Pd nanowalls and rGO nanosheets provides many benefits in electrochemical detection, such as charge carriers with rapid transport and a greater number of sensing sites; thus, the Pd-rGO-modified ITO electrode with 0.5 mg ml−1 rGO displays the best electrochemical sensitivity with regard to H2O2 detection. The responses to H2O2 differ linearly with the concentration (from 100 μM to 12 mM). These devices showed a lowest detection limit of 0.24 μM, excellent stability, and high reproducibility. The enhanced sensitivity of the sensor electrode is due to the synergistic effect between the electrocatalytic activity of the Pd nanowalls and the high conductivity and large surface area of rGO.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 241, 31 March 2017, Pages 1-7
نویسندگان
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