1. Preparation of carbon dots from waste cellulose diacetate as a sensor for tetracycline detection and fluorescence ink.
- Author
-
Zhao Z, Guo Y, Zhang T, Ma J, Li H, Zhou J, Wang Z, and Sun R
- Subjects
- Ammonium Hydroxide chemistry, Cellulose chemistry, Nanoparticles chemistry, Nanoparticles ultrastructure, Spectroscopy, Fourier Transform Infrared, X-Ray Diffraction, Biosensing Techniques, Carbon chemistry, Cellulose analogs & derivatives, Fluorescent Dyes chemistry, Ink, Quantum Dots, Tetracycline chemistry
- Abstract
As one type of the solid wastes, the increasing contamination of waste cellulose diacetate (CDA) from discarded cigarette filters is a growing problem worldwide. Finding a facile and suitable approach to convert the CDA into value-added materials is of significance. Herein, we reported a green, simple and effective method to reuse CDA as precursor for preparing fluorescence N-doped carbon dots (N-CDs) via one-pot hydrothermal carbonization in aqueous solution with low-cost ammonium hydroxide as the passivation agent. The N-CDs showed a quantum yield up to 22.4% with a maximum emission at 415 nm and excitation at 320 nm. Interestingly, the N-CDs exhibited high selectivity toward tetracycline (TC) as their fluorescence was obviously quenched by TC as a result of inner-filter effect. A linear relationship was fabricated over concentration range of 0-80 μM with a detection limit of 0.06 μM. Moreover, the N-CDs could also be applied as fluorescent ink for anti-forgery., Competing Interests: Declaration of competing interest The authors declare that they have no conflict of interest., (Copyright © 2020 Elsevier B.V. All rights reserved.)
- Published
- 2020
- Full Text
- View/download PDF