One-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solution
As the abundant biopolymer, cellulose can be used as a feedstock for chemicals and materials. Effective conversion of cellulose by simple processes is a key point. Degradation of cellulose in its homogeneous solution is attractive for the molecular chains are free and spread. Here, microcrystalline...
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doaj-7437effebc684583bf31cea1548278352021-02-02T02:22:34ZengKeAi Communications Co., Ltd.Green Energy & Environment2468-02572019-10-0144391399One-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solutionHui Su0Zhihao Bi1Yong Ni2Lifeng Yan3CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iCHEM, University of Science and Technology of China. Hefei, 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iCHEM, University of Science and Technology of China. Hefei, 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iCHEM, University of Science and Technology of China. Hefei, 230026, ChinaCorresponding author.; CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, iCHEM, University of Science and Technology of China. Hefei, 230026, ChinaAs the abundant biopolymer, cellulose can be used as a feedstock for chemicals and materials. Effective conversion of cellulose by simple processes is a key point. Degradation of cellulose in its homogeneous solution is attractive for the molecular chains are free and spread. Here, microcrystalline cellulose was first dissolved in aqueous solution of NaOH and urea, and then hydrothermal reaction was carried out at various temperature and time. Fluorescence carbon dots (CDs) were generated accompanied with six organic acids: oxalic acid, formic acid, malonic acid, lactic acid, acetic acid, and fumaric acid. The yields of all organic acids and CDs, and the fluorescence quantum yield (QY) of CDs were studied at different reaction conditions. It was found that the maximum yield of organic acids and CDs are 80.1% and 6.03%, respectively, and the highest QY of the CDs is 10.9%. Fluorescence studies reveal that the as-prepared CDs has efficient selectivity and sensitivity toward iron ions in acidic condition, indicating it is a potential fluorescent sensor to the detection of Fe3+. Importantly, it provides a panorama to summary the degradation routes of cellulose in its homogeneous aqueous solution with both organic molecules and CDs as products. Keywords: Cellulose, Homogeneous aqueous solution, Degradation, Organic acids, Carbon dots (CDs)http://www.sciencedirect.com/science/article/pii/S2468025718301353 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hui Su Zhihao Bi Yong Ni Lifeng Yan |
spellingShingle |
Hui Su Zhihao Bi Yong Ni Lifeng Yan One-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solution Green Energy & Environment |
author_facet |
Hui Su Zhihao Bi Yong Ni Lifeng Yan |
author_sort |
Hui Su |
title |
One-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solution |
title_short |
One-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solution |
title_full |
One-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solution |
title_fullStr |
One-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solution |
title_full_unstemmed |
One-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solution |
title_sort |
one-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solution |
publisher |
KeAi Communications Co., Ltd. |
series |
Green Energy & Environment |
issn |
2468-0257 |
publishDate |
2019-10-01 |
description |
As the abundant biopolymer, cellulose can be used as a feedstock for chemicals and materials. Effective conversion of cellulose by simple processes is a key point. Degradation of cellulose in its homogeneous solution is attractive for the molecular chains are free and spread. Here, microcrystalline cellulose was first dissolved in aqueous solution of NaOH and urea, and then hydrothermal reaction was carried out at various temperature and time. Fluorescence carbon dots (CDs) were generated accompanied with six organic acids: oxalic acid, formic acid, malonic acid, lactic acid, acetic acid, and fumaric acid. The yields of all organic acids and CDs, and the fluorescence quantum yield (QY) of CDs were studied at different reaction conditions. It was found that the maximum yield of organic acids and CDs are 80.1% and 6.03%, respectively, and the highest QY of the CDs is 10.9%. Fluorescence studies reveal that the as-prepared CDs has efficient selectivity and sensitivity toward iron ions in acidic condition, indicating it is a potential fluorescent sensor to the detection of Fe3+. Importantly, it provides a panorama to summary the degradation routes of cellulose in its homogeneous aqueous solution with both organic molecules and CDs as products. Keywords: Cellulose, Homogeneous aqueous solution, Degradation, Organic acids, Carbon dots (CDs) |
url |
http://www.sciencedirect.com/science/article/pii/S2468025718301353 |
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