Temperature-responsive polymer-tethered Zr-porphyrin MOFs encapsulated carbon dot nanohybrids with boosted visible-light photodegradation for organic contaminants in water

Xia, Zhinan; Shi, Bingfeng; Zhu, Wenshuai; Lü, Changli

doi:10.1016/j.cej.2021.131794

Cited by 68 publications

(27 citation statements)

References 74 publications

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“…It is difficult to degrade and toxic. It exists in the water environment for a long time, which will affect the selfpurification capacity of water and threaten human health through the food chain (Xia et al, 2021). According to previous studies, photocatalytic technology has proved to be an effective method for degrading dyes (Bargozideh et al, 2020;Chen et al, 2020;Sun et al, OPEN ACCESS EDITED BY 2020; Wen et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

In-situ synthesis of 3D BiOBr/UiO-66-NH2 heterojunction nanocomposite and its excellent photocatalytic degradation of rhodamine B dye

Feng

Yan²,

Ni³

et al. 2022

Front. Environ. Sci.

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As a primary goal, The fast recombination of stimulated excitons and poor visible light response are key problems in the photocatalysis field. Combining with materials with good visible light responses to form heterogeneous structures is still the most effective way. In this study, BiOBr/UiO-66-NH2 photocatalyst was synthesized by a simple method. BiOBr is a 3D spherical structure stacked by nanosheets, which enhance its adsorption capacity for pollutants and catalyze the dark reaction to reach the equilibrium point for too long. Coupling with UiO-66-NH2, its adsorption capacity was inhibited and the dark reaction time was shortened. The excellent removal rate of Rhodamine B (RhB) by BiOBr/UiO-66-NH2 reached 96.79% after 30 min of visible light irradiation and 99.37% after 90 min. With an increase in pollutant concentration, the composite still showed excellent photocatalytic performance. This study also tried to abandon the dark adsorption stage and directly degraded RhB efficiently and quickly under visible light. Finally, the photocatalytic enhancement mechanism was proposed.

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Section: Introductionmentioning

confidence: 99%

In-situ synthesis of 3D BiOBr/UiO-66-NH2 heterojunction nanocomposite and its excellent photocatalytic degradation of rhodamine B dye

Feng

Yan²,

Ni³

et al. 2022

Front. Environ. Sci.

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“…A schematic illustration of the synthesis route of temperature-responsive CDs2@TDCOFs@PNIPAM is displayed in Scheme . CDs were synthesized from p -phenylenediamine via the solvothermal method, and during the acid-catalyzed growth of TDCOFs, CDs were encapsulated into the formed channels under the influence of hydrogen bonding with the hydrazone bond of TDCOFs (Scheme A) . Both the inner and outer structures of TDCOFs were modified with CDs due to electrostatic attraction during the polymerization process.…”

Section: Resultsmentioning

confidence: 99%

“…The heat-induced phase transition feature of poly ( N -isopropylacrylamide) (PNIPAM) has led to an increasing interest in its application in the temperature-responsive monitoring of pesticides . PNIPAM chains will curl above the lower critical solution temperature (LCST) of about 33 °C . It has been reported that PNIPAM-functionalized porous polymers could achieve a controlled contact with guest molecules .…”

Section: Introductionmentioning

confidence: 99%

Temperature-Responsive Covalent Organic Framework-Encapsulated Carbon Dot-Based Sensing Platform for Pyrethroid Detection via Fluorescence Response and Smartphone Readout

Zhang

Zhu

et al. 2022

J. Agric. Food Chem.

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In this paper, carbon dot (CD)-encapsulated 1,3,5-tris(4-formylphenyl)benzene (TFB)/2,5-dihydroxyterephthalohydrazide (DHTH) covalent organic frameworks (TDCOFs) grafted with thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) (CDs@TDCOFs@PNIPAM) were fabricated for the detection of pyrethroids. CDs@TDCOFs@PNIPAM achieved a temperatureresponsive "on/off" detection of pyrethroids based on the target-triggered electron-transfer mechanism. The detection limit of pyrethroids was as low as 0.69 μg/L in the wide linear range of 5−400 μg/L (R 2 > 0.9523). Simultaneously, CDs@TDCOFs@ PNIPAM with red, green, and blue (RGB) fluorescence emissions were integrated with a smartphone-assisted device, enabling the visual smart quantitative detection of pyrethroids with a detection limit of 4.875 μg/L. Ultimately, agricultural products were chosen as actual samples to verify the applicability of both recognition modes, and the calculated recovery rate was 105.48−113.40%. Accordingly, CDs@TDCOFs@PNIPAM featuring temperature-responsive switching behavior and RGB fluorescence emission provided a promising analytical strategy for ensuring agricultural and food safety.

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“…Owing to the low content of Fe and P in the hybrid, the peaks of P 2p and Fe 2p are relatively weak. The binding energies of Fe 3+ appear at 709.7, 710.9, and 712.8 eV in the highresolution XPS spectra [23]. In addition, the peak at 714.7 eV is associated with Fe 2+ .…”

Section: X-ray Photoelectron Spectroscopy (Xps) Analysismentioning

confidence: 94%

Fast degradation of phenol over porphyrin-polyoxometalate composite photocatalysts under visible light

Xia¹,

Wang²,

Zhang³

et al. 2022

Polyoxometalates

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Both polyoxometalates (POMs) and metalloporphyrins exhibit high Arial. 9 efficiency. In this work, we designed two new composite catalysts with [5,10,15,20-tetra-(4carboxylphenyl)-porphyrinato]-ferric chloride (FeTCPP) and H 3 PW 12 O 40 (PW 12 )/H 3 PMo 12 O 40 (PMo 12 ), forming FeTCPP-PW 12 and FeTCPP-PMo 12 composite catalysts. The diameter of the catalyst particles was controlled by varying the dosage of the two reactants. The synthesis method of the catalysts is simple to operate and it can be obtained by ordinary precipitation after dissolution. Furthermore, the catalysts exhibited satisfactory activity and stability under the condition of repetitive tests. Our findings showed that phenol was almost completely degraded in 10 min under photocatalytic conditions catalyzed by the FeTCPP-PMo 12 photocatalyst. This work provides new concepts for developing new types of materials for environmental applications.

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Temperature-responsive polymer-tethered Zr-porphyrin MOFs encapsulated carbon dot nanohybrids with boosted visible-light photodegradation for organic contaminants in water

Cited by 68 publications

References 74 publications

In-situ synthesis of 3D BiOBr/UiO-66-NH2 heterojunction nanocomposite and its excellent photocatalytic degradation of rhodamine B dye

In-situ synthesis of 3D BiOBr/UiO-66-NH2 heterojunction nanocomposite and its excellent photocatalytic degradation of rhodamine B dye

Temperature-Responsive Covalent Organic Framework-Encapsulated Carbon Dot-Based Sensing Platform for Pyrethroid Detection via Fluorescence Response and Smartphone Readout

Fast degradation of phenol over porphyrin-polyoxometalate composite photocatalysts under visible light

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