|
|||||
|
|
A single-step synthesis of nitrogen-doped graphene sheets decorated with cobalt hydroxide nanoflakes for the determination of dopamine |
|
| Authors: | Muhammad Mehmood Shahi Ahmad H Ismail Ali MA Abdul Amir AL-Mokaram R Vikneswaran Sohail Ahma Amir Hamza and Arshid Numan |
| Institution: | Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia,Department of Chemistry, College of Science, Mustansiriyah University, Baghdad 10052, Iraq,Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia,Nanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, Malaysia,Faculty of Science, University of Haripur, Haripur 22620, K.P.K., Pakistan,Nanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, Malaysia and Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia |
| Abstract: | Nitrogen-doped reduced graphene oxide (NrGO) sheets decorated with Co(OH)2 nanoflakes were prepared by a single-step hydrothermal process. The morphological and structural characterizations of as synthesized NrGO@Co(OH)2 nanoflakes were performed by field emission scanning electron microscopy (FESEM), EDX-mapping and X-ray diffraction (XRD). NrGO@Co(OH)2 nanoflakes modified glassy carbon electrode (GCE) was used for electrochemical sensing of dopamine in neutral medium. The nanocomposite modified electrode showed enhanced electrochemical sensing ability for the detection of dopamine and the limit of detection (LoD) was found to be 0.201 μM with a sensitivity value of 0.0286 ± 0.002 mA mM−1. Interference studies revealed that NrGO@Co(OH)2─GCE endow excellent selectivity for DA detection even in the presence of higher concentration of common co-existing physiological interfering analytes. Additionally, proposed sensor demonstrated excellent performance in urine samples with promising reproducibility and stability. |
| Keywords: | Nitrogen doped graphene Dopamine Electrochemical sensor Amperometric detection |
| 本文献已被 CNKI ScienceDirect 等数据库收录！ | |
| 点击此处可从《自然科学进展(英文版)》浏览原始摘要信息 | |
| 点击此处可从《自然科学进展(英文版)》下载免费的PDF全文 | |