期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 162, 期 -, 页码 1839-1848出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.07.232
关键词
Chitosan; Phenothiazine; Mercury sensing; Eco-design; Solid state materials; Visual detection
资金
- Bilateral Romanian-Chinese Project [PN-III-P3-3.1-PM-RO-CN-2018-0098, 12/2018]
- European Union's Horizon 2020 -Research and Innovation Framework Programme [667387]
The aim of the paper was to investigate the ability of an eco-friendly luminescent xerogel prepared by chitosan crosslinking with a phenothiazine luminogen to detect and remove heavy metals. Its ability to give a divergent morphological and optical response towards fifteen environmental relevant metals was investigated by naked eye and UV lamp, fluorescence spectroscopy and scanning electron microscopy. A distinct response was noted for mercury, consisting in the transformation of the xerogel into a rubber-like material accompanied by the red shifting of the color of emitted light from yellow-green to greenish-yellow domain. The particularities of themetals anchoring into the xerogel were analyzed by FTIR spectroscopy and X-ray diffraction. Themorphological changes and the metal uptake were analyzed by SEM-EDAX, swelling and gravimetric methods. It was concluded that mercury has a superior affinity towards this heteroatoms rich system, leading to a secondary crosslinking. This directed a great absorption capacity of 1673 mg/g and a specific morphological response for mercury ion concentrations up to 0.001 ppm. (C) 2020 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据