Herein, we report the synthesis of sulfur-doped carbon quantum dots (S-CQDs) chemically incorporated with iron oxide nanoparticles (S-CQDs/Fe₂O₃) using hydrothermal synthesis strategy. The as-synthesized nanocomposite was characterized using powder X-ray diffraction, fourier transform infrared spectroscopy, transmission electron microscope, thermogravimetric analysis, and energy dispersive X-ray spectroscopy. We have analyzed the clear electrochemical kinetics of the S-CQDs/Fe₂O₃ nanocomposite modified glassy carbon electrode. Addition to this, electrochemical sensing property of S-CQDs/Fe₂O₃/GCE towards the detection of antipsychotic drug olanzapine (OLZ) was explored. Remarkably, S-CQDs/Fe₂O₃/GCE has shown the good electrocatalytic activity for OLZ oxidation and also exhibits a very low detection limit and sensitivity of about 0.006 μM and 0.88 μA μM⁻¹ cm⁻² respectively. Further, the proposed sensor has applied for the detection of OLZ in urine samples.

在本文中，我们报告了使用水热合成策略化学合成掺入氧化铁纳米颗粒（S-CQDs / Fe ₂ O ₃）的硫掺杂碳量子点（S-CQDs）。使用粉末X射线衍射，傅立叶变换红外光谱，透射电子显微镜，热重分析和能量色散X射线光谱对合成后的纳米复合材料进行表征。我们已经分析了S-CQDs / Fe ₂ O ₃纳米复合改性玻璃碳电极的清晰的电化学动力学。除此之外，S-CQDs / Fe ₂ O _3的电化学传感特性/ GCE技术用于检测抗精神病药物奥氮平（OLZ）。值得注意的是，S-CQDs / Fe ₂ O ₃ / GCE已显示出对OLZ氧化的良好电催化活性，并且还显示出非常低的检测限和灵敏度，分别约为0.006μM和0.88μAμM- ¹  cm ^-2。此外，提出的传感器已经应用于尿液样品中OLZ的检测。