Conversion of natural resources into value added products has attracted fabulous concern owing to their exceptional properties such as stability, biocompatibility, tunable emission and low toxicity. Herein, an inexpensive, environmentally benign and green method was adapted to synthesis of carbonaceous nanomaterials via hydrothermal process of mahua flowers without any additives. Cubical shape and average particle size of 4–5 nm was revealed from electron microscopic measurements. The prepared carbon nanocubes (CNCs) are rich in carbon and oxygenous functionality and the various chemical compositions was confirmed by spectroscopic measurements. CNCs are excitation dependent fluorescent in nature and exhibits the quantum yield of 7%. Under optimized conditions, the prepared CNCs were used to modify the glassy carbon electrode for the sensitive detection of antibiotics such as nitrofurazone and sulfamethoxazole via electrochemical method and LOD was calculated as 80 μM and 13 μM respectively. Additionally, fluorescence based sensing of nitrofurazone with a limit of detection as low as 0.7 μM has been discriminated. Inner filter effect (IFE) based quenching mechanism is proven via time resolved fluorescence technique. Moreover, this method was successfully applied to nitrofurazone discrimination in commercial milk sample. Therefore, the practicability of CNCs obtained from mahua flowers has also been validated.

将自然资源转化为增值产品的原因在于其出色的性能，例如稳定性，生物相容性，可调节的排放量和低毒性，因此备受关注。在本文中，一种廉价，环境友好和绿色的方法适用于通过不使用任何添加剂的麻花花卉的水热过程合成碳纳米材料。电子显微镜测量显示立方形状和4-5 nm的平均粒径。制备的碳纳米立方体（CNC）富含碳和含氧官能团，并且各种化学成分已通过光谱测量得到了证实。CNC本质上是依赖于激发的荧光，并且量子产率为7％。在优化条件下，制备的CNCs用于修饰玻碳电极，用于电化学检测灵敏的呋喃西林，磺胺甲恶唑等抗生素，LOD分别为80μM和13μM。此外，已经区分了呋喃西林的基于荧光的检测，检测限低至0.7μM。通过时间分辨荧光技术证明了基于内部过滤器效应（IFE）的猝灭机理。此外，该方法已成功应用于商业牛奶样品中的呋喃西林鉴别。因此，从麻花花卉中获得的CNCs的实用性也得到了验证。区分了基于呋喃西林的荧光检测，检测限低至0.7μM。通过时间分辨荧光技术证明了基于内部过滤器效应（IFE）的猝灭机理。此外，该方法已成功应用于商业牛奶样品中的呋喃西林鉴别。因此，从麻花花卉中获得的CNCs的实用性也得到了验证。区分了基于呋喃西林的荧光检测，检测限低至0.7μM。通过时间分辨荧光技术证明了基于内部过滤器效应（IFE）的猝灭机理。此外，该方法已成功应用于商业牛奶样品中的呋喃西林鉴别。因此，从麻花花卉中获得的CNCs的实用性也得到了验证。