There are increasing demands of more sensitive sensors for monitoring potential hazards in real water that may cause serious problems to human health. Herein, we report the development of a non-enzymatic nitrite sensor using nanocomposite of reduced graphene oxide decorated with silver nanoparticle (Ag-rGO). First, Ag-rGO nanocomposite was synthesized using a facile and cost-effective microwave-assisted approach. Then, as-synthesized Ag-rGO nanocomposite was used to modify glassy carbon electrode (GCE) and applied for the sensitive and selective detection of nitrite in the aqueous medium with increasing concentration of nitrite. Under optimized conditions, sensor achieved high sensitive response (18.4 μA/μM·cm²) in a wide linear range (0.1–120 μM), low limit of detection (∼0.012 μM), and good selectivity using differential pulse voltammograms (DPV). The applicability of fabricated non-enzymatic nitrite sensor was checked in real sample with satisfactory results.

人们越来越需要更灵敏的传感器来监测实际水中的潜在危害，这些危害可能对人类健康造成严重问题。在本文中，我们报告了一种使用银纳米颗粒（Ag-rGO）装饰的还原型氧化石墨烯的纳米复合材料开发的非酶法亚硝酸盐传感器。首先，使用简便且经济高效的微波辅助方法合成了Ag-rGO纳米复合材料。然后，将合成后的Ag-rGO纳米复合材料用于修饰玻碳电极（GCE），并用于随着亚硝酸盐浓度的增加而灵敏和选择性地检测水性介质中的亚硝酸盐。在优化条件下，传感器实现了高灵敏度响应（18.4μA/μM·cm ²）在宽线性范围（0.1–120μM），较低的检测下限（〜0.012μM）和使用差分脉冲伏安图（DPV）的良好选择性方面具有优势。所制备的非酶法亚硝酸盐传感器在实际样品中的适用性得到了满意的结果。