Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India.
Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India.
Chemosphere. 2023 Nov;341:139946. doi: 10.1016/j.chemosphere.2023.139946. Epub 2023 Aug 26.
A simpler and efficient method has been developed for the green synthesis of highly fluorescent carbon dots (CDs) from Azadirachta Indica leaves. The surface morphology of developed CDs has shown the existence of spherical particles in the size range of 3-8 nm with superior biocompatibility and high quantum yield value i.e. 42.3%. The particles exhibited a highly fluorescent and crystalline nature along with a bandgap value of 4.02 eV. The prepared CDs served as a factorial design for the sensing and degradation of Malachite green among other dyes. The main perspective of the current finding is that the designed catalyst exhibits excellent sensing results towards Malachite green with a limit of detection i.e. 0.144 μM in the concentration range of 0-50 μM. Moreover, the UV triggered results of photocatalysis illustrated a good dye removal efficacy by developed CDs with an average of 90.73, 98.25, 52 and 6.13% degradation in Methylene blue (MB), Malachite green (MG), Rhodamine 6G (Rh 6G) and Methyl orange (MO) upon 70 min of irradiation with mercury lamp. Additionally, the proton NMR, FTIR and FESEM results of the recycled samples also confirm the complete degradation of MG dye with the application of N-CDs.
一种从印楝叶中绿色合成高荧光碳点（CDs）的简单高效方法已经开发出来。所开发的 CDs 的表面形态显示出存在 3-8nm 范围内的球形颗粒，具有优异的生物相容性和高量子产率值，即 42.3%。这些颗粒表现出高度荧光和结晶性质，以及 4.02eV 的带隙值。所制备的 CDs 可用作因子设计，用于检测和降解孔雀石绿等染料。当前发现的主要观点是，所设计的催化剂对孔雀石绿表现出优异的传感结果，检测限为 0-50μM 浓度范围内的 0.144μM。此外，UV 触发的光催化结果表明，开发的 CDs 在汞灯下照射 70 分钟后，对亚甲蓝（MB）、孔雀石绿（MG）、罗丹明 6G（Rh 6G）和甲基橙（MO）具有良好的染料去除效果，平均降解率分别为 90.73%、98.25%、52%和 6.13%。此外，应用 N-CDs 时，循环样品的质子 NMR、FTIR 和 FESEM 结果也证实了 MG 染料的完全降解。
