Catalytic activation of peroxymonosulfate using MnO2@quasi-MOF for singlet oxygen mediated degradation of organic pollutants in water

Khojastegi, Anahita; Mokhtare, Amir; Mosleh, Aboozar; Abbaspourrad, Alireza

doi:10.1016/j.apcata.2022.118883

Cited by 17 publications

(5 citation statements)

References 62 publications

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“…In this circumstance the water treatment technologies have a principal role for providing safe drinking water for both humans and for industrial purpose and rectify the polluted water. Emerging engineered materials for advanced oxidation process and membrane technologies are among the two most popular and reliable methods for water purification [1]. However, membrane technology gained more attraction due to its process simplicity, lower energy consumption and safety [2].…”

Section: Introductionmentioning

confidence: 99%

Preparation, enhancement of permeability, and anti-biofouling properties of PEES/nano-silver/PVP mixed-matrix membrane

Soundarrajan

Alibrahim²,

Krishnamurthi³

et al. 2023

Mater. Res. Express

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This study investigated the separation of bovine serum albumin using a novel matrix mixed membrane composed of poly vinyl pyrrolidone and poly (phenylene ether ether sulfone)/Nano-silver. The responsive bare and modified PEES/Nano-silver membranes were evaluated using morphology, wettability, XRD and ATR-FTIR. The molecular weight cut-off (MWCO), water content, mean pore radius, porosity, and pure water flux were used to evaluate the presentation of mixed matrix membranes. The outcomes show that the membranes wettability is increased by the addition of PVP, which promotes the formation of hydrogen bonds. Its clear that the membranes are more hydrophilic than the PEES/Nano-silver membrane based on their performance. In addition, model foulants such bovine serum albumin (BSA) and E. coli were used to assess the efficacy of mixed matrix membranes anti-fouling properties. PVP loading results in more diversified surface morphology with asymmetric structure and higher water flux (4.35 × 10 -5 ms-1) than the pristine membrane (2.23 × 10-5 ms-1) as a reference at 3.5 bar without compromising the rejection of membrane. The flux recovery ratio for PEES/PVP/Nano-Silver membranes is 97%, which is significantly higher than the ratio for PEES/Nano-Silver membranes (62%). Furthermore, The results of fluorescence microscopy showed that, compared to clean membranes, the modified membranes have biofouling activities.

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Section: Introductionmentioning

confidence: 99%

Preparation, enhancement of permeability, and anti-biofouling properties of PEES/nano-silver/PVP mixed-matrix membrane

Soundarrajan

Alibrahim²,

Krishnamurthi³

et al. 2023

Mater. Res. Express

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“…This phenomenon is also observed in other inorganic nanocrystallites/quasi-MOF systems. 42,43 Meanwhile, the pore diameter of Bi-MOF is mainly located at 1.1 nm, while Bi 2 S 3 @quasi-Bi-MOF exhibits a micropore diameter of 1.6 nm and a mesopore diameter centered at 26.1 nm, indicating the partial preservation of the porous structure of parent MOF in Bi 2 S 3 @quasi-Bi-MOF. Therefore, the variation of the BET specific surface area and pore diameter after the in situ generation of Bi 2 S 3 in quasi-Bi-MOF reflects a controlled deligandation process.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

In Situ Implantation of Bi₂S₃ Nanorods into Porous Quasi-Bi-MOF Architectures: Enabling Synergistic Dissociation of Borohydride for an Efficient and Fast Catalytic Reduction of 4-Nitrophenol

et al. 2022

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for the catalytic reduction of 4-NP, delivering a high turnover frequency (TOF) of 1.67 × 10 −4 mmol mg −1 min −1 and an extremely high normalized rate constant (k nor ) of 435298 s −1 g −1 . The kinetic analysis and electrochemical tests indicate that this catalytic hydrogenation reduction follows the Langmuir−Hinshelwood mechanism. This study enriches the synthetic strategy of MOF-based derivatives and offers a new catalytic platform for hydrogenation reduction reactions.

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“…When TEMPO was used as the spin trapping agent, a threefold signal with a ratio of 1:1:1 adduct and a hyperfine splitting constant a N = 16.87 G characteristic of a TEMPO‐ 1 O 2 confirmed the presence of O 2 •− . [ 53 ]…”

Section: Resultsmentioning

confidence: 99%

“…•− . [53] Finally, the intermediates in the photocatalytic degradation of SMX were investigated by LC-MS using an aliquot collected at ≈30 min of reaction time under optimized conditions. We proposed two pathways that could be involved in the degradation of SMX (m/z 254) based on the detected masses and literature, including i) oxidation and ii) bond cleavage, as illustrated in Scheme S3 (Supporting Information).…”

Section: Photocatalytic Properties Of the Woven Cofsmentioning

confidence: 99%

Modulating Narrow Bandgap in a Diacetylene Functionalized Woven Covalent Organic Framework as a Visible Light Responsive Photocatalyst

Khojastegi,

Khosropour,

Amirjalayer

et al. 2023

Adv Funct Materials

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Woven covalent organic frameworks (COF) possess entangled 3D frameworks. The metallated version of these structures contains spatially isolated Cu(I) centers and promising optoelectronic properties because of metal‐to‐ligand charge transfer (MLCT). However, despite their potential, woven COFs have not yet been investigated as photocatalysts. In this study, a new woven COF, Cu‐PhenBDA‐COF, functionalized with diacetylene bonds is developed. Cu‐PhenBDA‐COF is fully characterized, and the optoelectronic and photocatalytic properties are compared to previously reported Cu‐COF‐505. The diacetylene bonds of the linker positively impact the optoelectronic properties of Cu‐PhenBDA‐COF and result in a narrower bandgap and better charge separation efficiency. When the Cu(I) center is removed from both woven COFs, the absorption edge is blueshifted, resulting in a wider bandgap, and there is a considerable decrease in the charge separation efficiency, underscoring the pivotal role of MLCT. This trend is reflected in the photocatalytic activity of the woven COFs toward the degradation of sulfamethoxazole in water, where the highest reaction rate constant (kapp) is recorded for the metallated diacetylene functionalized woven COF, Cu‐PhenBDA‐COF.

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Catalytic activation of peroxymonosulfate using MnO2@quasi-MOF for singlet oxygen mediated degradation of organic pollutants in water

Cited by 17 publications

References 62 publications

Preparation, enhancement of permeability, and anti-biofouling properties of PEES/nano-silver/PVP mixed-matrix membrane

Preparation, enhancement of permeability, and anti-biofouling properties of PEES/nano-silver/PVP mixed-matrix membrane

In Situ Implantation of Bi₂S₃ Nanorods into Porous Quasi-Bi-MOF Architectures: Enabling Synergistic Dissociation of Borohydride for an Efficient and Fast Catalytic Reduction of 4-Nitrophenol

Modulating Narrow Bandgap in a Diacetylene Functionalized Woven Covalent Organic Framework as a Visible Light Responsive Photocatalyst

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Catalytic activation of peroxymonosulfate using MnO2@quasi-MOF for singlet oxygen mediated degradation of organic pollutants in water

Cited by 17 publications

References 62 publications

Preparation, enhancement of permeability, and anti-biofouling properties of PEES/nano-silver/PVP mixed-matrix membrane

Preparation, enhancement of permeability, and anti-biofouling properties of PEES/nano-silver/PVP mixed-matrix membrane

In Situ Implantation of Bi2S3 Nanorods into Porous Quasi-Bi-MOF Architectures: Enabling Synergistic Dissociation of Borohydride for an Efficient and Fast Catalytic Reduction of 4-Nitrophenol

Modulating Narrow Bandgap in a Diacetylene Functionalized Woven Covalent Organic Framework as a Visible Light Responsive Photocatalyst

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In Situ Implantation of Bi₂S₃ Nanorods into Porous Quasi-Bi-MOF Architectures: Enabling Synergistic Dissociation of Borohydride for an Efficient and Fast Catalytic Reduction of 4-Nitrophenol