期刊
MATERIALS
卷 13, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/ma13030504
关键词
carbon dots; photoluminescence; nitrogen doping; life cycle assessment; green chemistry; engineered nanomaterials
类别
资金
- EDER through NORTE2020
- FEDER through COMPETE2020
- FCT/MEC (PIDDAC)
- FEDER through COMPETE-POFC
- FCT under the Scientific Employment Stimulus [CEECIND/01425/2017]
- [NORTE-01-0145-FEDER-000028]
- [POCI-01-0145-FEDER-006980]
- [PTDC/QEQ-QAN-5955/2014]
- Fundação para a Ciência e a Tecnologia [PTDC/QEQ-QAN/5955/2014] Funding Source: FCT
The efficiency and associated environmental impacts of different N-doping strategies of carbon dots (CDs) were evaluated. More specifically, N-doped CDs were prepared from citric acid via two main synthesis routes: Microwave-assisted hydrothermal treatment with addition of N-containing small organic molecules (urea and ethylenediamine (EDA)); and microwave-assisted solvothermal treatment in N-containing organic solvents (n,n-dimethylformamide (DMF), acetonitrile and pyridine). These syntheses produced CDs with similar blue emission. However, XPS analysis revealed that CDs synthesized via both hydrothermal routes presented a better N-doping efficiency (15 at.%) than all three solvothermal-based strategies (0.6-7 at.%). However, from the former two hydrothermal strategies, only the one involving EDA as a nitrogen-source provided a non-negligible synthesis yield, which indicates that this should be the preferred strategy. This conclusion was supported by a subsequent life cycle assessment (LCA) study, which revealed that this strategy is clearly the most sustainable one from all five studied synthesis routes.
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