期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 163, 期 -, 页码 593-602出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.07.018
关键词
Cellulose matrix; Colorimetric sensor; in-site identification; Synergistic mechanism; Ag+
资金
- National Natural Science Foundation of China [31860193]
- National Key Research and Development Program of China [2018YFD0800700]
- Guangxi Youth Natural Science Fund [2018GXNSFBA281174]
- Guangxi Science and Technology Research Program [14251009, AA17202032]
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control [ZR201701]
- Guangxi University Young Doctor Research Foundation Project [XBZ180057]
A novel cellulose-based colorimetric sensor (DAC-Tu) with N, S sites for Ag+ was prepared. The DAC-Tu exhibited excellent selectivity and sensitivity for Ag+ with a naked eyes color change from white to black in mixed metal ions aqueous solutions. The naked-eye in-situ detection limit of DAC-Tu for Ag+ was 10(-6) mol/L within 10 min. The cellulose matrix and the grafted functional groups (-Cd=S, -NH2) of DAC-Tu all contributed to the low naked-eye in-situ detection limit. The mechanism of the visual recognition of DAC-Tu sensor for Ag+ was proposed, the N and S atoms of DAC-Tu preferentially coordination chelated with Ag+ to form N-Ag, S-Ag, and Ag2S, and enriched on the cellulose matrix, thus the DAC-Tu presented different color change in response to different concentrations of Ag+. The as-prepared DAC-Tu colorimetric sensor showed a great application prospect for in-situ naked eyes detection of Ag+. (C) 2020 Published by Elsevier B.V.
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