A reversible colorimetric chemosensor for naked-eye detection of copper ions using poly (aspartic acid) nanofibrous hydrogel
作者： Caidan Zhang , Lynn Yuqin Wan , Shaohua Wu , Dequn Wu , Xiaohong Qin
DOI: 10.1016/J.DYEPIG.2015.07.028
关键词: Naked eye 、 Selectivity 、 Detection limit 、 Nuclear chemistry 、 Copper 、 Chemistry 、 Aspartic acid 、 Organic chemistry 、 Aqueous solution 、 Ion 、 Biuret test
摘要: Abstract A novel, biodegradable colorimetric chemosensor for Cu 2+ ions detection in aqueous water was designed using poly (aspartic acid) nanofibrous hydrogel, based on the strong complexation ability of hydrogel and specific color change phenomena biuret reaction. The sensor exhibited high sensitivity selectivity toward over other competing with a limit 0.01 mg/L. Furthermore, displayed sensitive response presence according to pH values it exposed to. on–off–on switching behavior upon alternation between 14 1 illustrated an excellent reversible change. This low-cost, possessed promising application practical real samples provided new insight into design hydrogel.
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