Efficient adsorption and photocatalysis over a photorenewable uranyl-organic framework for removal of diquat herbicide

Che, Guang; Yang, Weiting; Luo, Jian; Li, Meiling; Li, Xinyi; Pan, Qinhe

doi:10.1016/j.seppur.2023.126126

Cited by 6 publications

(3 citation statements)

References 56 publications

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“…Compared with other methods, photocatalytic reduction can be carried out under mild reaction conditions to convert highly-toxic Cr(VI) into low-toxic Cr(III), achieving the essential removal of Cr(VI) [ 17 ]. Moreover, solar energy as the energy source for photocatalysis is green, clean and low-cost [ 18 , 19 ]. Therefore, how to improve the photoreduction ability of materials for Cr(VI) has become a hot topic [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of Mass Transfer Process for Photocatalytic Reduction in Cr(VI) by Electric Field Assistance

Feng,

Lin,

Gan

et al. 2024

IJMS

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The removal of Cr(VI), a highly-toxic heavy metal, from industrial wastewater is a critical issue in water treatment research. Photocatalysis, a promising technology to solve the Cr(VI) pollution problem, requires urgent and continuous improvement to enhance its performance. To address this need, an electric field-assisted photocatalytic system (PCS) was proposed to meet the growing demand for industrial wastewater treatment. Firstly, we selected PAF-54, a nitrogen-rich porous organic polymer, as the PCS’s catalytic material. PAF-54 exhibits a large adsorption capacity (189 mg/g) for Cr(VI) oxyanions through hydrogen bonding and electrostatic interaction. It was then coated on carbon paper (CP) and used as the photocatalytic electrode. The synergy between capacitive deionization (CDI) and photocatalysis significantly promotes the photoreduction of Cr(VI). The photocatalytic performance was enhanced due to the electric field’s influence on the mass transfer process, which could strengthen the enrichment of Cr(VI) oxyanions and the repulsion of Cr(III) cations on the surface of PAF-54/CP electrode. In addition, the PCS system demonstrates excellent recyclability and stability, making it a promising candidate for chromium wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

“…Moreover, solar energy as the energy source for photocatalysis is green, clean and lowcost [18,19]. Therefore, how to improve the photoreduction ability of materials for Cr(VI) has become a hot topic [20].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Mass Transfer Process for Photocatalytic Reduction in Cr(VI) by Electric Field Assistance

Feng,

Lin,

Gan

et al. 2024

IJMS

Self Cite

View full text Add to dashboard Cite

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“…In recent years, the rise of organic pollutants, such as antibiotics and pesticides, has posed a growing threat to ecosystems and human health [1][2][3] . Photocatalysis, a green and sustainable catalytic technology, holds promise in addressing this challenge [4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of Ag/AgCl/PAF-54 heterojunction photocatalysts for TC degradation

Lin,

Gan,

Zhao

et al. 2024

Chem Synth

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Photocatalysis plays an increasingly important role in the field of water treatment. Among the catalysts, Ag nanoparticles (NPs), a type of noble metal NP, show extraordinary potential for photocatalysis. Nevertheless, the aggregation caused by high surface energy limits their applications. The simple synthesis of Ag NPs with uniform size remains a challenge. In this work, a nitrogen-rich porous organic polymer (POP) with reduction ability, porous aromatic framework (PAF)-54, was chosen as the carrier for the in-situ synthesis of Ag NPs. By virtue of the reducing framework of PAF-54 and the formation of the AgCl/PAF-54 heterojunction, the in-situ reduction of Ag(I) was realized, and thus Ag NPs with the particle size of 20-25 nm were uniformly distributed on PAF-54, which exhibit a strong localized surface plasmon resonance (LSPR) effect. Furthermore, the Ag/AgCl/PAF-54 heterojunction effectively suppresses the recombination of photogenerated electrons and holes, leading to the enhanced photocatalytic ability of the composite material. Even with a small catalyst dosage, rapid tetracycline (TC) degradation can be achieved, and the degradation rate of TC reached 94.8% in 30 min. This study offers a facilitated approach for fabricating Ag-based POP composites with superior photocatalytic properties.

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All‐in‐One: Photo‐Responsive Lanthanide‐Organic Framework for Simultaneous Sensing, Adsorption, and Photocatalytic Reduction of Uranium

Huang,

Li,

Mei

et al. 2024

Adv Funct Materials

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The selective removal and immobilization of uranyl ions from aqueous solutions is essential for the sustainable development of nuclear energy. Herein, a robust lanthanide‐organic framework material (IHEP‐24) is developed for simultaneous fluorescence sensing, selective adsorption, and photocatalytic reduction of uranium, integrating three different functions in one material. The confined space formed by the coordination assembly of viologen derivative ligands and metal‐oxygen clusters can act as precise recognition sites for uranyl, allowing IHEP‐24 to efficiently detect and capture uranyl ions. In addition, the presence of a viologen‐based radical ligand enables IHEP‐24 to a further photocatalytic reduction of the adsorbed uranyl to amorphous UO2. The mechanisms of adsorption and photocatalysis are revealed by batch experiments, photoelectrochemical characterizations, and theoretical calculations. This study provides a reference for the construction of robust multi‐functional MOF materials and also provides support for the deep removal and immobilization of radionuclides from aqueous solution.

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Efficient adsorption and photocatalysis over a photorenewable uranyl-organic framework for removal of diquat herbicide

Cited by 6 publications

References 56 publications

Enhancement of Mass Transfer Process for Photocatalytic Reduction in Cr(VI) by Electric Field Assistance

Enhancement of Mass Transfer Process for Photocatalytic Reduction in Cr(VI) by Electric Field Assistance

Facile synthesis of Ag/AgCl/PAF-54 heterojunction photocatalysts for TC degradation

All‐in‐One: Photo‐Responsive Lanthanide‐Organic Framework for Simultaneous Sensing, Adsorption, and Photocatalytic Reduction of Uranium

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