Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 1, Pages 1644-1650Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c20203
Keywords
acyihydrazone; covalent organic frameworks; fluorescent sensor; in situ growth; palladium(II) ion; test paper
Funding
- National Natural Science Foundation of China [52063014, 51873053]
- Science and Technology Cooperation Project of Zunyi Science & Technology Bureau and Zunyi Medical University [ZSKHHZZ-2020-34]
- Science and Technology Project of Guizhou Province [QKH Platform talents [2017] 5733-067]
- National Key R&D Program of China [2019YFC1904304]
- Fundamental Research Funds for the Central Universities [2020YQHH01]
- Foundation of State Key Laboratory of Structural Chemistry [20190003]
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The synthesized XB-COFs were found to have selective fluorescent detection capability for Pd2+ in water, with strong adsorption capacity and ability to partially reduce Pd2+ to nanoparticles. A fluorescent test paper prepared with XB-COFs allows for rapid visual detection of Pd2+.
With the extensive use of palladium derivatives in the industry, their environmental pollution has become more and more serious. Herein, ally! functionalized hydrazone 2D COFs (XB-COFs) were found for selective fluorescent detection of Pd2+ (detection concentration of 0.29 mu M) in water. The stable structure of the hydrazone bond and the complexation ability of allyl to Pe cause XB-COF to have a good fluorescence sensing effect in both acid and alkaline solutions, and its adsorption capacity for Pd2+ is up to 120 mg g(-1). During the interaction between XB-COF and Pd2+ a part of Pd2+ can be reduced to Pd nanoparticles with a diameter of about 10 nm. A fluorescent test paper was prepared by the in situ growth of XB-COF onto a filter paper, which can realize visualization detection of Pd2+ in 10 s with the naked eye or under a 365 nm UV lamp. This is the first time a fluorescent test paper based on in the situ growth of COFs has been applied for the detection of heavy metal ions, which provides a new platform for the application of COF materials in the medical health field, food safety, and environmental protection.
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