Journal
CHEMISTRYSELECT
Volume 4, Issue 10, Pages 2898-2902Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201803512
Keywords
cellulose; graphene quantum dots; green synthesis; renewable resources; sustainable routes
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Funding
- National Natural Science Foundation of China [21805166, 51603132]
- 111 Project of Hubei Province [2018-19-1]
- Open Fundation of State Key Laboratory of Biofuel Technology for Automobile [KFKT2018003]
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Fabrication of graphene quantum dots (GQDs) often requires strong acids or organic solvents, and their green synthesises on sustainable routes still face challenges. Herein, an eco-friendly synthetic process has been developed, in which the natural polymer cellulose has been utilized as a new precursor for the first time. The reaction system is only composed of cellulose and water, in absence of any other chemical reagents. Moreover, the products contain only GQDs, carbide precipitates, and water, leading to easy separation and avoiding complicated post-processes. In addition, the synthetic mechanism is presented that the formation process of GQDs consists of the first hydrolyzation and the following cyclic condensation. With highly photoluminescent (PL) properties, favourable hydrophilicity, low cytotoxicity and excellent biocompatability, the as-synthesized GQDs have been successfully applied in bioimaging. This work not only develops a sustainable route for the green synthesis of GQDs, but also finds a renewable resource as the raw material, which significantly facilitates the extensive applications of GQDs in biological fields.
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