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Issue 69, 2015
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Color-tunable luminescent CdTe quantum dot membranes based on bacterial cellulose (BC) and application in ion detection

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Abstract

Color-tunable luminescent membranes of CdTe QDs on bacterial cellulose (BC) nanofibers were successfully fabricated by in situ synthesis in aqueous solution. No nitrogen protection and expensive reagents are needed during the preparation process. The luminescent color of the CdTe/BC nanocomposite membranes with green, orange and red luminescence can be tuned easily by controlling the reaction time. The prepared CdTe/BC nanocomposites were characterized by X-ray diffraction (XRD), field effect scanning electron microscopy with energy dispersive X-ray analysis (FESEM-EDX) and transmission electron microscopy (TEM). Ultraviolet-visible (UV-vis), photoluminescence (PL) spectra and PL quantum efficiency (PL QE) were used to investigate the optical properties. Moreover, we attempted to make the luminescent membranes into an ion test paper. The green luminescent membranes had a good selectivity for Cu2+ with a detection limit of 0.016 mM and the mechanism of quenching Cu2+ were also explored. This work provides a simple, effective and eco-friendly method for the construction of luminescent CdTe QDs on BC membranes with high detectability for detection of Cu2+.

Graphical abstract: Color-tunable luminescent CdTe quantum dot membranes based on bacterial cellulose (BC) and application in ion detection

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Supplementary files

Article information


Submitted
06 May 2015
Accepted
17 Jun 2015
First published
19 Jun 2015

RSC Adv., 2015,5, 55756-55761
Article type
Paper
Author version available

Color-tunable luminescent CdTe quantum dot membranes based on bacterial cellulose (BC) and application in ion detection

Y. Ge, S. Chen, J. Yang, B. Wang and H. Wang, RSC Adv., 2015, 5, 55756
DOI: 10.1039/C5RA08361C

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