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Issue 8, 2018
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Sulfonylcalix[4]arene functionalized nanofiber membranes for effective removal and selective fluorescence recognition of terbium(III) ions

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Abstract

An attractive sulfonylcalix[4]arene functionalized nanofiber membrane (sulfonylcalix-NFM) was fabricated by immobilizing the negatively charged sulfonylcalix[4]arene onto aminated polyacrylonitrile (APAN) nanofibers acting as an adsorbent and a sensor for the effective removal and naked-eye recognition of Tb3+ ions. Various factors affecting the adsorption capacities such as initial solution pH, concentration, membrane dosage, contact time and a series of foreign interfering ions were investigated in detail. The sulfonylcalix-NFM showed a maximum adsorption capacity of 123.92 mg g−1 for Tb3+, and absorbed membranes could be well regenerated without obvious compromise of removal efficiency after three repeated adsorption–desorption cycles. Moreover, it was found that the co-existing cations K+, Mg2+, and Ca2+ hardly interfered with the adsorption of Tb3+, while Cu2+, Eu3+, and La3+ could markedly reduce the removal efficiency of Tb3+. The possible adsorption mechanism of Tb3+ ions onto the sulfonylcalix-NFM was mainly attributed to the complex of the loaded sulfonylcalix[4]arene ligand with Tb3+ ions. In addition, the Tb3+-loaded sulfonylcalix-NFM exhibited good photoluminescence performance with green fluorescence under 365 nm UV radiation due to the binding of Tb3+ ions with sulfonylcalix[4]arene, which has been successfully applied for selective fluorescence recognition of Tb3+ ions with a low naked-eye detection limit of 0.5 ppm.

Graphical abstract: Sulfonylcalix[4]arene functionalized nanofiber membranes for effective removal and selective fluorescence recognition of terbium(iii) ions

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Publication details

The article was received on 04 Jan 2018, accepted on 05 Mar 2018 and first published on 06 Mar 2018


Article type: Paper
DOI: 10.1039/C8NJ00045J
Citation: New J. Chem., 2018,42, 6191-6202
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    Sulfonylcalix[4]arene functionalized nanofiber membranes for effective removal and selective fluorescence recognition of terbium(III) ions

    W. Hua, M. Wang, P. Li, K. Shen, X. Wang and B. S. Hsiao, New J. Chem., 2018, 42, 6191
    DOI: 10.1039/C8NJ00045J

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