Plasma polyacrylic acid and hollow TiO2 spheres modified with rhodamine B for sensitive electrochemical sensing Cu(II)
作者： Zhihong Zhang , Hongfei Ji , Shuai Zhang , Donglai Peng , Qixuan Fu
DOI: 10.1039/C5NJ02483H
关键词: Chemistry 、 Plasma polymerization 、 Polymer chemistry 、 Rhodamine B 、 Electrochemistry 、 Nanocomposite 、 Electrochemical gas sensor 、 Rhodamine 、 Polyacrylic acid 、 Adsorption
摘要: We report a novel nanocomposite of hollow TiO2 microspheres and plasma polyacrylic acid (TiO2@PPAA) modified with rhodamine B (TiO2@PPAA-RhB). This was further used as an electrochemical sensor for the ultra-sensitive selective detection Cu2+ in water. A gold electrode nanospheres, followed by closely bonded layer PPAA via polymerization. Subsequently, carboxyl groups TiO2@PPAA nanocomposites were activated to ester N-hydroxysuccinimide/1-ethyl-3-(3-dimethylaminoprolyl) carbodiimide hydrochloride. The resultant reacted amino on form amide groups, leading modification rhodamine. Considering synergistic effect strong electrostatic interaction between Cu2+, direct adsorption surface, coordination chemistry formed rhodamine, developed biosensor exhibited high sensitivity detection, limit 0.404 pM within range 0.001–10 nM Cu2+. Therefore, fabricated based TiO2@PPAA-RhB can be obtained polymerization represents highly promising tool use environmental monitoring.
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