Selective adsorption and detection of p-arsanilic acid on MOF-on-MOF heterostructure induced by nitrogen-rich self-assembly template

[Display omitted] •Three copper novel MOFs were designed and synthesized with different copper valences.•Cu(I)-tpp provides nuclear sites for ZIF-8 to form a Cu(I)-tpp@ZIF-8 heterostructure.•Cu(I)-tpp shows highly sensitive detection performance for three common OAAs.•Cu(I)-tpp@ZIF-8 assembles adsor...

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Veröffentlicht in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2022-01, Vol.427, p.131483, Article 131483
Hauptverfasser: Zhu, Ke, Wu, Jingkun, Fan, Ruiqing, Cao, Yang, Lu, Haoyang, Wang, Bowen, Zheng, Xubin, Yin, Yuanyuan, Wang, Ping, Yang, Yulin
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Sprache:eng
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Zusammenfassung:[Display omitted] •Three copper novel MOFs were designed and synthesized with different copper valences.•Cu(I)-tpp provides nuclear sites for ZIF-8 to form a Cu(I)-tpp@ZIF-8 heterostructure.•Cu(I)-tpp shows highly sensitive detection performance for three common OAAs.•Cu(I)-tpp@ZIF-8 assembles adsorption and fluorescence sensing abilities for p-ASA.•Porous ZIF-8 improves both sensitivity and selectivity to p-ASA among similar OAAs. P-arsanilic acid (p-ASA), as a widely used feed additive, is potentially toxic to aquatic organisms and seriously affects the water environment. Therefore, the development of an intelligent multi-functional material for selective simultaneous detection and removal of p-ASA in water has become a top priority. Here, we report one case of novel nitrogen-rich two-dimensional metal–organic framework, Cu(I)-tpp (Htpp = 1-(4-(tetrazol-5-yl))3-(pyrzin-2-yl) pyrazol), which has outstanding fluorescence emission at 655 nm; and nitrogen-rich sites exposed on the surface make it an excellent self-assembly template to induce the formation of heterostructures. According to the target requirements, ZIF-8 is selected to construct the Cu(I)-tpp@ZIF-8 heterostructure by liquid-phase epitaxy ignoring the lattice mismatch problem. And the electronic structure of the Cu(I)-tpp framework is analyzed by electrostatic potential (ESP) to determine the nucleation site of ZIF-8. The prepared Cu(I)-tpp@ZIF-8 heterostructure assembles adsorption and fluorescence sensing properties, exhibiting significant adsorption (qmax = 303.0 mg g−1) and fluorescence quenching response (LOD = 0.4 µg·L−1) for p-ASA. Notably, Cu(I)-tpp@ZIF-8 achieves a special response to p-ASA that is different from other organic arsenic acids, especially compared with its isomer (o-ASA) and roxarsone (ROX). As a smart multifunctional material, Cu(I)-tpp@ZIF-8 realizes the specificity in the simultaneous detection and removal of p-ASA, presenting excellent application prospects in water quality monitoring.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2021.131483