MOF-derived N-doped ZnO carbon skeleton@hierarchical Bi2MoO6 S-scheme heterojunction for photodegradation of SMX: Mechanism, pathways and DFT calculation

Wang, Aiwen; Ni, Jiaxin; Wang, Wei; Wang, Xiyang; Li, Dongmei; Zhu, Qi

doi:10.1016/j.jhazmat.2021.128106

Cited by 127 publications

(40 citation statements)

References 55 publications

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“…Moreover, MOF-525-Fe/Zr-modified cathode significantly improves the mineralization rate of SMX compared with MOF-like catalysts proposed in previous studies (Table 3) [66][67][68][69][70][71][72][73][74].…”

Section: Analysis Of Degradation Effect and Mechanismmentioning

confidence: 62%

“…Despite the interference of various organic pollutants, it can be seen in the above figure that with the prolongation of the reaction time, the SMX degradation efficiency of MOF-525-Fe/Zr-modified cathode continued to increase, and after 180 min, the TOC removal rates of the three water samples were more than 75%. Moreover, MOF-525-Fe/Zr-modified cathode significantly improves the mineralization rate of SMX compared with MOF-like catalysts proposed in previous studies (Table 3) [66][67][68][69][70][71][72][73][74]. In order to verify the catalytic stability and reuse the MOF-525-Fe/Zr@CF in PEF process, repetitive degradation was performed.…”

Section: Analysis Of Degradation Effect and Mechanismmentioning

confidence: 91%

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Reconstruction of Electronic Structure of MOF-525 via Metalloporphyrin for Enhanced Photoelectro-Fenton Process

Han

Lin

et al. 2022

Catalysts

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Photoelectro-Fenton (PEF) process can continuously promote the occurrence of Fenton reaction and the generation of active species, which is an advanced oxidation technology for pollutant degradation. However, the lack of bifunctional catalysts restricts the development of PEF technology. In this study, the electronic rearrangement MOF-525 modified by metalloporphyrin (named MOF-525-Fe/Zr) was prepared, to load on the carbon felt as a novel cathode catalyst, which is used in PEF process. A series of characterization and photoelectric chemical properties tests combined with DFT calculation showed that the modification of MOF-525 could not only have the large specific surface area and multistage pore structure but also co-stimulate the metal-to-ligand charge transfer (MLCT) and ligand-to-cluster charge transfer (LCCT) by photoelectric synergy. These charge transitions provide periodic electron donor-acceptor conduction paths in MOF-525-Fe/Zr, which can improve the active species formation and transfer efficiency. Owing to their favorable pore and electronic structure as well as stability, MOF-525-Fe/Zr shows great promise for the application in the catalytic process of PEF. Sulfamethoxazole (SMX) degradation was enhanced by MOF-525-Fe/Zr with the TOC removal rate above 75% both in river water and tap water. Finally, the reasonable pathway of PEF catalytic degradation of SMX was proposed by HPLC-MS analysis. In conclusion, this study provides a new idea for reconstructing the electronic structure of MOFs catalyst and broadening the practical application of PEF technology.

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Section: Analysis Of Degradation Effect and Mechanismmentioning

confidence: 62%

Section: Analysis Of Degradation Effect and Mechanismmentioning

confidence: 91%

Reconstruction of Electronic Structure of MOF-525 via Metalloporphyrin for Enhanced Photoelectro-Fenton Process

Han

Lin

et al. 2022

Catalysts

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“…Due to the well-known limitations of DFT, it is reasonable to apply the same exchange and correlation functions to compute the value of the band gap in the current work. [41,49,50] Cu 2-x S has both a minimum conduction band (CBM) and a maximal valence band (VBM) near the G point. The ZnIn 2 S 4 VBM is at point X, while the CBM is at point G. Cu 2-x S is a direct band gap semiconductor, while ZnIn 2 S 4 is an indirect band gap semiconductor, according to their findings.…”

Section: Dft Calculationmentioning

confidence: 99%

Hollow Nanoboxes Cu_2‐xS@ZnIn₂S₄ Core‐Shell S‐Scheme Heterojunction with Broad‐Spectrum Response and Enhanced Photothermal‐Photocatalytic Performance

Wang

Liu

et al. 2022

Small

107

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Major issues in photocatalysis include improving charge carrier separation efficiency at the interface of semiconductor photocatalysts and rationally developing efficient hierarchical heterostructures. Surface continuous growth deposition is used to make hollow Cu2‐xS nanoboxes, and then simple hydrothermal reaction is used to make core‐shell Cu2‐xS@ZnIn2S4 S‐scheme heterojunctions. The photothermal and photocatalytic performance of Cu2‐xS@ZnIn2S4 is improved. In an experimental hydrogen production test, the Cu2‐xS@ZnIn2S4 photocatalyst produces 4653.43 µmol h−1 g−1 of hydrogen, which is 137.6 and 13.8 times higher than pure Cu2‐xS and ZnIn2S4, respectively. Furthermore, the photocatalyst exhibits a high tetracycline degradation efficiency in the water of up to 98.8%. For photocatalytic reactions, the hollow core‐shell configuration gives a large specific surface area and more reactive sites. The photocatalytic response range is broadened, infrared light absorption enhanced, the photothermal effect is outstanding, and the photocatalytic process is promoted. Meanwhile, characterizations, degradation studies, active species trapping investigations, energy band structure analysis, and theoretical calculations all reveal that the S‐scheme heterojunction can efficiently increase photogenerated carrier separation. This research opens up new possibilities for future S‐scheme heterojunction catalyst design and development.

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“…32 Consistent with the results of BET, there were mesopores (2-50 nm) in the sample, which are shown in the BJH (Barrett-Joyner-Halenda) model. 33 The BET surface areas of CS, GCS, and GCS@CTA@MgFe-LDHs were 1.51 m 2 g À1 , 8.73 m 2 g À1 , and 29.46 m 2 g À1 , respectively. The BET surface area of GCS was larger than that of CS, which was due to CS changing from flakes into microspheres with the formation of wrinkles during the drying process.…”

Section: Characterization Of Gcs@cta@mgfe-ldhsmentioning

confidence: 93%

Adsorption of nitrate from water by quaternized chitosan wrinkled microspheres@MgFe-LDH core–shell composite

et al. 2022

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MOF-derived N-doped ZnO carbon skeleton@hierarchical Bi2MoO6 S-scheme heterojunction for photodegradation of SMX: Mechanism, pathways and DFT calculation

Cited by 127 publications

References 55 publications

Reconstruction of Electronic Structure of MOF-525 via Metalloporphyrin for Enhanced Photoelectro-Fenton Process

Reconstruction of Electronic Structure of MOF-525 via Metalloporphyrin for Enhanced Photoelectro-Fenton Process

Hollow Nanoboxes Cu_2‐xS@ZnIn₂S₄ Core‐Shell S‐Scheme Heterojunction with Broad‐Spectrum Response and Enhanced Photothermal‐Photocatalytic Performance

Adsorption of nitrate from water by quaternized chitosan wrinkled microspheres@MgFe-LDH core–shell composite

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MOF-derived N-doped ZnO carbon skeleton@hierarchical Bi2MoO6 S-scheme heterojunction for photodegradation of SMX: Mechanism, pathways and DFT calculation

Cited by 127 publications

References 55 publications

Reconstruction of Electronic Structure of MOF-525 via Metalloporphyrin for Enhanced Photoelectro-Fenton Process

Reconstruction of Electronic Structure of MOF-525 via Metalloporphyrin for Enhanced Photoelectro-Fenton Process

Hollow Nanoboxes Cu2‐xS@ZnIn2S4 Core‐Shell S‐Scheme Heterojunction with Broad‐Spectrum Response and Enhanced Photothermal‐Photocatalytic Performance

Adsorption of nitrate from water by quaternized chitosan wrinkled microspheres@MgFe-LDH core–shell composite

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Product

Resources

About

Hollow Nanoboxes Cu_2‐xS@ZnIn₂S₄ Core‐Shell S‐Scheme Heterojunction with Broad‐Spectrum Response and Enhanced Photothermal‐Photocatalytic Performance