Sulfamethazine (SMZ), a widely used sulfonamide, is frequently detected in animal-derived foods, posing significant health problems. Developing rapid, reliable, and sensitive analytical methods for SMZ detection is crucial for ensuring food safety. Transition-metal oxides, with their excellent redox properties and electroactive sites, have shown great potential as suitable candidates for SMZ sensor applications. However, their practical application is hindered by limitations in electrical conductivity and electrochemical stability. To address these challenges, we introduce a novel, highly selective sensor based on a 2D graphitic carbon nitride (g-C₃N₄) network anchored to silver molybdate (Ag₂MoO₄) nanospheres. This synergistic combination leverages the exceptional electron transport capabilities of g-C₃N₄ and the electroactive properties of Ag₂MoO₄, resulting in a sensor with enhanced sensitivity and stability for non-enzymatic SMZ detection. A novel Ag₂MoO₄/g-C₃N₄ hybrid sensing platform with exceptional performance for detecting sulfamethazine has been developed. The sensor demonstrates a speedy response, high sensitivity, a low detection limit of 0.0416 μM, a wide detection range of 0.5 to 660 μM, and excellent long-term stability. Furthermore, the sensor demonstrates its practical applicability by successfully detecting sulfamethazine in real sample analyses. The enhanced sensing performance of the Ag₂MoO₄/g-C₃N₄ hybrid can be ascribed to its abundant electroactive sites, unique electronic structure, and strong mutual interaction between the Ag₂MoO₄ and g-C₃N₄ components. These discoveries extend Ag₂MoO₄/g-C₃N₄-based sensing devices with nanoscale structures and improved interfacial characteristics.

中文翻译：

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2D 石墨氮化碳纳米片/钼酸银纳米复合材料：用于实际样品分析中磺胺二甲嘧啶的高灵敏度电化学传感器


磺胺二甲嘧啶 （SMZ） 是一种广泛使用的磺胺类药物，经常在动物源性食品中检测到，造成严重的健康问题。开发快速、可靠且灵敏的 SMZ 检测分析方法对于确保食品安全至关重要。过渡金属氧化物具有优异的氧化还原性能和电活性位点，已显示出成为 SMZ 传感器应用的理想候选者的巨大潜力。然而，它们的实际应用受到电导率和电化学稳定性的限制。为了应对这些挑战，我们推出了一种新型的高选择性传感器，该传感器基于锚定在钼酸银 （Ag ₂ MoO ₄ ） 纳米球上的 2D 石墨氮化碳 （g-C ₃ N ₄ ） 网络。这种协同组合利用了 g-C ₃ N ₄ 卓越的电子传输能力和 Ag ₂ MoO ₄ 的电活性特性，使传感器在非酶 SMZ 检测中具有更高的灵敏度和稳定性。一种新型 Ag ₂ MoO ₄ /g-C ₃ N ₄ 混合传感平台已被开发出来，该平台在检测磺胺二甲嘧啶方面具有卓越的性能。该传感器具有响应速度快、灵敏度高、0.0416 μM 的低检出限、0.5 至 660 μM 的宽检测范围以及出色的长期稳定性。此外，该传感器通过在实际样品分析中成功检测磺胺二甲嘧啶，证明了其实际适用性。 Ag ₂ MoO ₄ /g-C ₃ N ₄ 杂化物增强的传感性能可归因于其丰富的电活性位点、独特的电子结构以及 Ag ₂ MoO ₄ 和 g-C ₃ N ₄ 组分之间强烈的相互作用。这些发现扩展了基于 Ag ₂ MoO ₄ /g-C ₃ N ₄ 的传感器件，使其具有纳米级结构和改进的界面特性。