| Nitrogen-doped hollow carbon spheres for electrochemical sensing of sulfite |
| کد مقاله : 1047-CNF |
| نویسندگان |
|
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 |
| Sulfite ions (SO32-) is usually used as a perfect preservative in food industry for food and beverages storage because it has perfect effects for preventing oxidation, preserving vitamin C, inhibiting bacterial growth and controlling enzymatic browning reactions [1]. However, the SO32- has some seriously toxic effects on both environment and human health. Sulfite ions (SO32-) is the main existent formation in sulphur dioxide (SO2) aqueous solution. In natural water, SO32- can cause a detrimental effect on aquatic creatures by influencing the acid-base balance and depleting the dissolved oxygen [2]. For human being, the presence of excess amount of sulfite in water and other food samples is an origin to many major problems such as asthmatic, allergic reaction, mutagenic, and cocarcinogenic effects [3-5]. Therefore, the detection and analysis of sulfite is necessary in quality control of manufactured food and beverage products, as well as in environmental monitoring. In particular, low-cost, highly sensitive/selective, easily applicable, fast and accurate analytical methods are required. In recent years, the development of nanomaterial-based electrochemical sensors for the detection of various compounds has garnered immense attention due to their advantages, such as high sensitivity, high selectivity, real-time monitoring, fast response, ease of use, and the possibility of miniaturization [6, 7]. In this work, an electrochemical sensor is applied for determination of sulfite based on a glassy carbon electrode (GCE) modified with nitrogen-doped hollow carbon spheres (N-HCSs). The N-HCSs were prepared by a silica template method using dopamine as a carbon precursor. The N-HCSs/GCE showed remarkable electrocatalytic activity for the oxidation of sulfite, with minimized oxidation overpotential and boosted voltammetric response peak current. Under the optimized experimental conditions, the oxidation peak currents of sulfite were proportional to its concentrations in the range of 1.0–200.0 μM and the limit of detection (LOD) was 0.25 μM. |
| کلیدواژه ها |
| Sulfite, Electrochemical sensor, Glassy carbon electrode, Nitrogen-doped hollow carbon spheres |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |