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Issue 10, 2020
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Facile one-pot synthesis of self-assembled nitrogen-doped carbon dots/cellulose nanofibril hydrogel with enhanced fluorescence and mechanical properties

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Abstract

The preparation and functionalization of biomass-based hydrogels that can be used in the field of biomedicine have received an increasing amount of attention. Carbon dots are a kind of fluorescent carbon nanomaterial with stable fluorescence emission and low biotoxicity, therefore the introduction of carbon dots into the biomass-based hydrogel can make it have a broader application prospect. In this work, fluorescent nitrogen-doped carbon dots/cellulose nanofibril composite hydrogel (NCDs/CNF-gel) with exceptional mechanical properties was successfully fabricated by a facile one-pot green hydrothermal treatment. The properties of NCDs/CNF-gel prepared at different temperatures and CNF concentrations were investigated by electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, fluorescence spectroscopy, rheology, and mechanical tests. NCDs/CNF-gel with injectable, pressure-resistance and excellent fluorescence properties can be obtained by controlling the hydrothermal treatment temperature. Furthermore, the self-assembly mechanism of NCDs in the hydrogel network and the improvement mechanism of hydrogel compressive strength were explored. The NCDs/CNF-gel exhibited acid-resistant and alkaline sensitive blue-green fluorescent emission. The outstanding biocompatibility, excellent fluorescence and mechanical properties of NCDs/CNF-gels, and their facile fabrication render these so-prepared gels promising candidates for future biomedical applications.

Graphical abstract: Facile one-pot synthesis of self-assembled nitrogen-doped carbon dots/cellulose nanofibril hydrogel with enhanced fluorescence and mechanical properties

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Supplementary files

Article information


Submitted
09 Mar 2020
Accepted
27 Apr 2020
First published
29 Apr 2020

Green Chem., 2020,22, 3296-3308
Article type
Paper

Facile one-pot synthesis of self-assembled nitrogen-doped carbon dots/cellulose nanofibril hydrogel with enhanced fluorescence and mechanical properties

X. Chen, Z. Song, S. Li, N. Tat Thang, X. Gao, X. Gong and M. Guo, Green Chem., 2020, 22, 3296
DOI: 10.1039/D0GC00845A

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