期刊
APPLIED SURFACE SCIENCE
卷 565, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.150526
关键词
Green synthesis; Lignin; Carbon quantum dots; Formation mechanism
类别
资金
- National Natural Science Foundation of China [51676047, 51861145102]
- Scientific Research Foundation of Graduate School of Southeast University, China [YBPY2109]
This study utilized biomass lignin to synthesize carbon quantum dots with excellent fluorescence properties, serving as fluorescent nanoprobe for metal ion detection. The use of renewable biomass not only enables sustainable, cost-effective, and mass production of CQDs, but also provides a novel alternative nanoprobe for sensing applications.
Biomass transformation into high-value carbon nanomaterials plays a dual role of easing the energy material crisis and reasonable disposal of waste. Here, we employed biomass lignin as carbon source to synthesize fluorescent carbon quantum dots (CQDs) through a facile two-step method. The preparation condition is optimized at 0.3 g of acid additive and 200 degrees C, 16 h of hydrothermal treatment. The resultant CQDs with the average diameter of 4.86 nm and high quantum yield of 23.68% are composed of carbon cores and surface functional groups, exhibiting the maximum green emission wavelength of 476 nm. The formation mechanism involves acid dissociation of lignin in the first step, and then the aromatic refusion of lignin fragments. The CQDs show great advantages as fluorescent nanoprobe for metal ion detection, which present an apparent and selective fluorescence quenching effect on Fe3+. This CQD nanoprobe has a highly sensitive response to Fe3+ ions in the concentration of 0 similar to 300 mu M with detection limit of 0.77 mu M. The utilization of renewable biomass lignin in this study not only opens the avenue of the sustainable, cost-effective and mass production of CQDs, but also provides a novel alternative nanoprobe for sensing field.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据