In this work, Carbon Quantum Dots (CQDs) are synthesized from agro-waste Ananas comosus by facile hydrothermal treatment. The synthesized CQDs are characterized using powder X-ray diffraction analysis, Fourier-transform infrared, UV–Visible spectral analysis and quantum yield (QY) measurements. The formation of CQDs with a mean particle size of 2.4 nm is measured using HR-TEM analysis. The fluorescence properties of CQDs show strong blue emission radiation with a QY of 10.65%. Antioxidant assay of the CQDs were assessed against DPPH (2, 2-diphenyl-1-picrylhydrazyl), Super oxide anion radical scavenging, hydroxyl radical scavenging and hydrogen peroxide radical scavenging activities. The results suggest that agro-waste is also one of the promising materials for optical switching devices and also it have good medicinal value by extracting drugs.

在这项工作中，碳量子点（CQDs）是由农业废弃物的菠萝（Ananas comosus）合成的。通过简便的水热处理。合成的CQD使用粉末X射线衍射分析，傅立叶变换红外光谱，UV-可见光谱分析和量子产率（QY）测量进行表征。使用HR-TEM分析测量平均粒径为2.4 nm的CQD的形成。CQD的荧光特性显示出强蓝色发射辐射，QY为10.65％。评估了CQD的抗氧化性，分析了其对DPPH（2，2-二苯基-1-吡啶并肼基），超氧化物阴离子自由基清除，羟基自由基清除和过氧化氢自由基清除活性的作用。结果表明，农业废弃物也是光开关设备的有前途的材料之一，并且通过提取药物也具有良好的药用价值。