| Enhancement of electrochemical detection of hydroxylamine with surface modification of glassy carbon electrode by using nitrogen-doped hollow carbon spheres |
| کد مقاله : 1048-CNF |
| نویسندگان |
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اشکان بسنده *1، هادی بیت اللهی2 1دانشجوی کارشناسی ارشد دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته کرمان 2عضو هیات علمی دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته کرمان |
| چکیده مقاله |
| Hydroxylamine (NH2OH) is a colorless inorganic compound and an oxygenated derivative of ammonia (NH3) which can undergo both oxidation and reduction reactions. Hydroxylamine is commonly used as a raw material in industrial and pharmaceutical processes, where some hydroxylamine derivatives are used to make anticancer drugs [1]. However, it is a well-known moderately toxic and harmful chemical for human, animal, and plant since it can create reversible and irreversible physiological changes [2]. Similarly, in the environmental point of view, oceanic hydroxylamine produces nitrous oxide and hence considered as a hazardous compound [3]. Therefore, from the viewpoint of industrial, environmental and public health, development of sensitive analytical technique for the determination of hydroxylamine is of considerable significance. Recently, electrochemical sensing has attracted great attention and been widely applied in the determination of various analytes owing to its low cost, rapid response, high selectivity and sensitivity, and etc [4, 5]. For improving the analytical performance of electrochemical sensors, specific nanomaterials are usually needed to modify electrodes. Nowadays, carbon nanostructured materials including carbon nanotubes, graphene, fullerenes, and HCSs are widely used as one of the important materials for various applications. Among the carbon nanostructures, N-HCSs have attracted increasing amounts of attention due to their unique shapes and special properties such as high specific surface area, low density, electrical conductivity, ease of functionalization, porosity, and ease of preparation [6]. Based on the above advantages, N-HCSs can be considered as an ideal candidate for the preparation of electrochemical sensors. In this study, a simple electrochemical sensor for detection of hydroxylamine based on a glassy carbon electrode (GCE) modified with nitrogen-doped hollow carbon spheres (N-HCSs) was reported. The results of cyclic voltammetry (CV) proved that N-HCSs/GCE had the highest catalytic activity for the oxidation of hydroxylamine as compared with unmodified GCE. Under the optimized experimental conditions, differential pulse voltammetry (DPV) showed that the electrochemical current of the sensor was linear to the concentration of hydroxylamine in dynamic range of 1.0-400.0 μM. Also, the limit of detection (LOD) was estimated to be 0.3 μM. |
| کلیدواژه ها |
| Hydroxylamine, Electrochemical sensor, Glassy carbon electrode, Nitrogen-doped hollow carbon spheres |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |