In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 10, No. 5 ( 2022), p. 1690-1697
Abstract:
Rapid and quantitative detection of nitrobenzene (NB) in wastewater is of great significance to protect the natural environment and human health. In this work, bifunctional Ln@Zr-MOFs based on UiO-66 were successfully fabricated by partially replacing terephthalic acid (H 2 BDC) ligands with m -phthalic acid ( m -H 2 BDC) ligands and post-synthetic modification (PSM) with Ln 3+ (Ln 3+ = Eu 3+ , Tb 3+ ). The “antenna effect” of the m -H 2 BDC ligands makes Ln@Zr-MOFs exhibit the characteristic emissions of Ln 3+ . By adjusting the amount and type of Ln 3+ , controllable color-tuning emissions can be easily realized, which endows them with a great application prospect for white LEDs. On the other hand, Eu 10 @Zr-MOFs can serve as a turn-off fluorescent switch of NB because the red emission from Eu 3+ can be easily quenched by NB through a photoinduced electron transfer (PET) process between NB and its ligands, and as a result, NB is successfully recognized. Particularly, Eu 10 @Zr-MOFs as a fluorescent probe have shown many appealing properties, such as high sensitivity (limit of detection is 1.04 μM, limit of quantification is 3.48 μM, and K sv = 24459.71 M −1 ), quick response (less than 60 s), a broad response window (0–180 μM), excellent selectivity, and strong anti-interference ability. The real detection results of NB concentration in natural water samples have demonstrated that the reported Eu 10 @Zr-MOFs are a potential fluorescent material that can precisely and sensitively perform fluorescence sensing of NB.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702245-6
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