Selvaraj Hosimin, Bruntha Ganapathy, Ilangovan Andivelu
School of Chemistry, Bharathidasan University, Trichy, Tamil Nadu, 620024, India.
J Fluoresc. 2024 Jul 13. doi: 10.1007/s10895-024-03845-z.
Carbon dots synthesized from a renewable and sustainable source of biomass have greater attention in the nanomaterial research field. In the present study, we adopted a facile and green synthesis of carbon dots from bio waste of pumpkin seeds using a one-pot microwave-assisted carbonization method. The synthesized carbon dots exhibit excellent photoluminescence properties with a bright blue emission peak at 399 nm and fluorescence quantum yield was about 9.5%. The optical properties and structure of carbon dots were examined using various spectroscopy techniques and the synthesized carbon practical size was about 4.37 nm and possessed good solubility in water. Carbon dots were used for the detection of Ferric ions in the water bodies and the interaction between Fe ions and carbon dots was evaluated by fluorescence spectroscopy techniques. This method is a simple and selective detection of Fe in the aqueous medium. Interestingly carbon dots also show good antibacterial activity at a very low concentration (1 mg/L) for effective control of E. coli 93% and Pseudomonas aeruginosa (81%), within 12 h.
由可再生且可持续的生物质源合成的碳点在纳米材料研究领域受到了更多关注。在本研究中，我们采用一锅法微波辅助碳化法，从南瓜籽的生物废料中简便绿色地合成了碳点。合成的碳点具有优异的光致发光性能，在399nm处有一个明亮的蓝色发射峰，荧光量子产率约为9.5%。使用各种光谱技术研究了碳点的光学性质和结构，合成的碳点实际尺寸约为4.37nm，在水中具有良好的溶解性。碳点用于检测水体中的铁离子，并通过荧光光谱技术评估了铁离子与碳点之间的相互作用。该方法是在水介质中简单且选择性地检测铁。有趣的是，碳点在非常低的浓度（1mg/L）下也表现出良好的抗菌活性，能在12小时内有效控制93%的大肠杆菌和81%的铜绿假单胞菌。
