期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 403, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.123698
关键词
metal-organic frameworks; post-modification; hydrogen sulfide sensor; Cu2+ sensor; tandem sensing
资金
- National Natural Science Foundation of China [21775136, 21771158, 21301149, 21401160]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [17KJB150039]
- 333 Project of Jiangsu Province [BRA2019287]
- Six Top Talents Program of Jiangsu Province [2018-XCL-063, 2019-XCL-097]
- Qing Lan Project
- Talent Project of Jiangsu Association for Science and Technology
- Yancheng Institute of Technology
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province [JH201821]
- Research Funds from Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials
- Joint Open Fund of Jiangsu Collaborative Innovation Center for Ecological Building Material and Environmental Protection Equipments
The fabrication of a dual responsive sensor UiO-66-MA for detecting H2S and Cu2+ in aquatic environments has been achieved through post-modification of UiO-66-MOF, showing high sensitivity and selectivity. The tandem functions of UiO-66-MA for detecting H2S and Cu2+ demonstrate the potential of developing multifunctional MOF sensors based on combinatorial principles.
Fabrication of metal-organic frameworks (MOFs) based multifunctional sensors for various environmental pollutants represents a promising solution to the development of novel monitoring technologies. In this work, a dual responsive sensor of UiO-66-MA has been efficiently fabricated via post-modification of the UiO-66-MOF with maleic anhydride (MA), and dual detection of H2S and Cu2+ in aquatic environments has been achieved tandemly. UiO-66-MA could selectively undergo Michael addition with H2S accompanying a linear fluorescence turn-on behavior. The sensing is highly sensitive and selective, and the detection limit value of 3.3 nM represents the lowest record among all MOF-based H2S sensing researches. Moreover, an alternative sensor for Cu2+ could be further tandemly afforded after the H2S sensing. The H2S added product of UiO-66-MA/H2S exhibits selective fluorescence quenching towards Cu2+ with a detection limit as low as 2.6 nM. UiO-66-MA exhibits dual sensing functions for H2S and Cu2+ following a tandem process based on combinatorial principles of Michael addition and S-Cu coordination. Evaluation studies suggest the promising potentials of UiO-66-MA in determining the level of H2S and Cu2+ in aquatic environment, and the tandemly derived dual sensing functions demonstrate the advantages of developing multifunctional MOF sensors based on combinatorial principles.
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