Carbon dots production via pyrolysis of sago waste as potential probe for metal ions sensing
This work reports the synthesis of carbon dots (C-dots)from sago industrial waste using thermal pyrolysis approach. The pyrolysis condition was found to govern the carbonisation conversion of bulk sago waste into carbon rich residue that can be further isolated to obtain carbon dots. In order to o...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Elsevier B.V.
2013
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/45326/3/Carbon%20dots%20production%20-%20Copy.pdf http://ir.unimas.my/id/eprint/45326/ https://www.sciencedirect.com/science/article/abs/pii/S0165237013002398 https://doi.org/10.1016/j.jaap.2013.11.001 |
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| Summary: | This work reports the synthesis of carbon dots (C-dots)from sago industrial waste using thermal pyrolysis
approach. The pyrolysis condition was found to govern the carbonisation conversion of bulk sago waste
into carbon rich residue that can be further isolated to obtain carbon dots. In order to obtain the best yield
ofthe carbon dots, optimization ofthe thermal pyrolysis conditions have been performed which consisted
of varying temperature of carbonisation at a constant heating duration. The C-dots can be dispersed
in aqueous media and portrayed a significant fluorescent property that can be observed by naked eye
under a UV light source. The optimum temperature of carbonisation was determined at 400 ◦C in which
the strongest fluorescence emission was record at 390 nm with the optimum excitation wavelength
of 315 nm. The fluorescence of the C-dots was found to be significantly quenched in the presence of
various metal ions. Thus, the C-dots can be adopted as a potential optical probe for sensing of metal
ions in aqueous media. An analytical characterization has been performed in this study over a series
of commonly available metal ions and the sensing characteristics were evaluated using the standard
Stern–Volmer quenching model. This study has successfully demonstrated an innovative approach of
converting agricultural waste into high value optical sensing receptors for metal ions detection. |
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