Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India.
Department of Chemistry, College of Science and Arts, and Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran 11001, Saudi Arabia.
Molecules. 2022 Aug 21;27(16):5329. doi: 10.3390/molecules27165329.
The transformation of biowaste into products with added value offers a lucrative role in nation-building. The current work describes the synthesis of highly water-soluble, luminous carbon quantum dots (CQDs) in the size range of 5-10 nm from discarded rice straw. The small spherical CQDs that were formed had outstanding optical and luminescent qualities as well as good photostabilities. By performing quantitative multi-assay tests that included antioxidant activities, in vitro stability and colloidal assay investigations as a function of different CQD concentrations, the biocompatibility of CQDs was evaluated. To clearly visualize the type of surface defects and emissive states in produced CQDs, excitation-dependent fluorescence emission experiments have also been carried out. The "waste-to-wealth" strategy that has been devised is a successful step toward the quick and accurate detection of Cu ion in aqueous conditions. The fluorescence-quenching behavior has specified the concentration dependency of the developed sensor in the range of 50 μM to 10 nM, with detection limit value of 0.31 nM. The main advantage of the current research is that it offers a more environmentally friendly, economically viable and scaled-up synthesis of toxicologically screened CQDs for the quick fluorescence detection of Cu ions and opens up new possibilities in wastewater management.
将生物废物转化为具有附加值的产品，在国家建设中具有重要作用。本研究描述了从废弃稻秆中合成尺寸在 5-10nm 范围内的高水溶性、发光碳量子点（CQDs）。形成的小球状 CQDs 具有出色的光学和发光性能以及良好的光稳定性。通过进行定量多分析测试，包括抗氧化活性、体外稳定性和胶束测定研究，评估了 CQDs 的生物相容性。为了清楚地观察所制备 CQDs 的表面缺陷和发射状态类型，还进行了依赖于激发的荧光发射实验。所设计的“变废为宝”策略是快速、准确检测水溶液中 Cu 离子的成功步骤。荧光猝灭行为指定了所开发传感器在 50μM 至 10nM 范围内的浓度依赖性，检测限为 0.31nM。当前研究的主要优势在于，它提供了一种更环保、经济可行和规模化的毒理学筛选 CQDs 合成方法，用于 Cu 离子的快速荧光检测，并为废水管理开辟了新的可能性。
