Efficient photocatalytic degradation of tetracycline under visible light by Z-scheme Ag3PO4/mixed-valence MIL-88A(Fe) heterojunctions: Mechanism insight, degradation pathways and DFT calculation

Yang, Zhenfei; Xia, Xinnian; Shao, Lang; Wang, Longlu; Liu, Yutang

doi:10.1016/j.cej.2021.128454

Cited by 167 publications

(36 citation statements)

References 56 publications

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“…It was well known that the generation of H 2 O 2 has two possible ways in the photocatalytic system: (1) hydrogen peroxide can be produced by photogenerated electrons in the photocatalyst oxidizing dissolved oxygen in water (O 2 + 2H + + e À = H 2 O 2 , EO 2 /H 2 O 2 = À 5.43 eV vs. Vacuum); [54] (2) hydroxyl ions (OH À ) in water can be reduced to * OH by holes (H 2 À ) + h + = * OH, EH 2 O/ * OH = À 6.73 eV vs. Vacuum), and * OH could quickly recombine into H 2 O 2 ( * OH + * OH = H 2 O 2 ).…”

Section: Photocatalytic Mechanismsmentioning

confidence: 99%

Efficient and Sustainable in situ Photo‐Fenton Reaction to Remove Phenolic Pollutants by NH₂‐MIL‐101(Fe)/Ti₃C₂T_x Schottky‐Heterojunctions

Jiang

Yang

et al. 2022

Chemistry A European J

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Metal-organic frameworks (MOFs) with abundant active sites, a class of materials composed of metal nodes and organic ligands, is widely used for photocatalytic degradation of pollutants. However, the rapid recombination of photoinduced carriers of MOFs limits its photocatalytic degradation performance. Herein, Ti 3 C 2 T x nanosheets-based NH 2 -MIL-101(Fe) hybrids with Schottky-heterojunctions were fabricated by in situ hydrothermal assembly for improved photocatalytic activity. The photodegradation efficiencies of the NH 2 -MIL-101(Fe)/Ti 3 C 2 T x (N-M/T) hybrids for phenol and chlorophenol were 96.36 % and 99.83 % within 60 minutes, respectively. The N-M/T Schottky-heterojunction duly transferred electrons to the Ti 3 C 2 T x nanosheets surface via built-in electric fields, effectively suppressing the recombination of photogenerated carriers, thereby improving the photocatalytic performance of NH 2 -MIL-101(Fe). Moreover, the Femixed-valence in the N-M/T led to improvement in the efficiency of the in situ generated photo-Fenton reactions, further enhancing the photocatalytic activity with more generated reactive oxygen species (ROS). The study proposes a highly effective removal of phenolic pollutants in wastewater.[a] C.

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Section: Photocatalytic Mechanismsmentioning

confidence: 99%

Efficient and Sustainable in situ Photo‐Fenton Reaction to Remove Phenolic Pollutants by NH₂‐MIL‐101(Fe)/Ti₃C₂T_x Schottky‐Heterojunctions

Jiang

Yang

et al. 2022

Chemistry A European J

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“…The numerous phenolic hydroxyl groups are believed to be the source of MT’s superhydrophilicity and adsorption capacity. The original O–CO peaks at 1598 and 1390 cm –1 of MIL-88A were relatively weaker . A broad peak appeared near 620 cm –1 , which is a sign of the presence of Ti–O …”

Section: Resultsmentioning

confidence: 94%

“…The original O−C� O peaks at 1598 and 1390 cm −1 of MIL-88A were relatively weaker. 45 A broad peak appeared near 620 cm −1 , which is a sign of the presence of Ti−O. 46 Figure 5b shows the XRD pattern of MIL-88A.…”

Section: Effect Of the Volume Of Mt On The Separationmentioning

confidence: 99%

Photo-Fenton Antifouling Membrane Based on Hydrophilized MIL-88A for Sustainable Treatment of Colored Emulsions

Zheng

Wang

Zhao

et al. 2022

Ind. Eng. Chem. Res.

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The complex composition of emulsions often adversely affects separations. When using hydrophilic membranes for oil-in-water emulsions, the oil and other components reduce hydrophilicity, flux, and separation efficiency. The separation of colored emulsions poses a challenge to membrane technology. This work reports a method to inlay hydrophilic particles on the surface of MIL-88A. The modified MIL-88A can form a hydrophilic coating on the membrane that is resistant to scouring. Thanks to the randomly distributed rod-like structure, this grooved coating has remarkable resistance to contamination. Flux can be restored by water washing. A flux close to 5000 L m −2 h −1 bar −1 is consistently maintained in 10 emulsion separations. The modified membrane removes 99% of dyes in addition to oil when treating colored emulsions. Dyes adsorbed to the surface can be degraded by the photo-Fenton reaction under visible light, which ensures the ability to treat colored emulsions continuously.

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“…More specifically, the photoelectrons in the CB of Cu 2 O and most of the photoelectrons in the CB of SrTi 0.99 Cr 0.01 O 3 migrate to the surface to interact with O 2 molecules to generate •O 2 – (O 2 /•O 2 – , −0.33 eV), , which further oxidizes IPA to produce acetone. The photogenerated holes in the VB of SrTi 0.99 Cr 0.01 O 3 can directly oxidize IPA, or holes first react with H 2 O molecules or OH – to generate •OH (•OH/OH – , 1.99 eV)), , which in turn reacts with IPA molecules to generate acetone.…”

Section: Resultsmentioning

confidence: 99%

Cu₂O/SrTi_1–xCr_xO₃ Heterojunction Photocatalyst for the Efficient Degradation of Isopropanol under Visible Light Irradiation

Zhang

Chen

et al. 2022

Langmuir

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A heterojunction of Cu 2 O and Cr-doped SrTiO 3 (SrTi 1−x Cr x O 3 ) was designed for selective photocatalytic isopropanol (IPA) oxidation under visible light irradiation. The photocatalytic oxidation of IPA was measured in a fixed-bed reactor. Cr dopants can increase the light absorption and improve the activity of the catalyst. The formation of the Cu 2 O/SrTi 1−x Cr x O 3 heterojunction can further broaden the absorption range of lights and dramatically increase the photocatalytic activity for selective oxidation of IPA. The 3% Cu 2 O/SrTi 0.99 Cr 0.01 O 3 catalyst can fully convert ∼1000 ppm IPA under illumination in 2 h. The selectivity of acetone is ∼100%. The yield is 83 and 4 times higher than that using SrTiO 3 and SrTi 0.99 Cr 0.01 O 3 as catalysts, respectively. By measuring the ultraviolet−visible absorption spectra and Mott−Schottky plots, we obtained the band structure of the heterojunction, which shows that the conduction and valence bands of Cu 2 O are higher than those of SrTi 1−x Cr x O 3 , therefore facilitating the separation and transfer of photogenerated electrons and holes. In addition, electron paramagnetic resonance spectroscopy and radical trapping tests reveal that the generation of hydroxyl and superoxide leads to photocatalytic oxidation of IPA by the heterojunction photocatalyst.

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Efficient photocatalytic degradation of tetracycline under visible light by Z-scheme Ag3PO4/mixed-valence MIL-88A(Fe) heterojunctions: Mechanism insight, degradation pathways and DFT calculation

Cited by 167 publications

References 56 publications

Efficient and Sustainable in situ Photo‐Fenton Reaction to Remove Phenolic Pollutants by NH₂‐MIL‐101(Fe)/Ti₃C₂T_x Schottky‐Heterojunctions

Efficient and Sustainable in situ Photo‐Fenton Reaction to Remove Phenolic Pollutants by NH₂‐MIL‐101(Fe)/Ti₃C₂T_x Schottky‐Heterojunctions

Photo-Fenton Antifouling Membrane Based on Hydrophilized MIL-88A for Sustainable Treatment of Colored Emulsions

Cu₂O/SrTi_1–xCr_xO₃ Heterojunction Photocatalyst for the Efficient Degradation of Isopropanol under Visible Light Irradiation

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Efficient photocatalytic degradation of tetracycline under visible light by Z-scheme Ag3PO4/mixed-valence MIL-88A(Fe) heterojunctions: Mechanism insight, degradation pathways and DFT calculation

Cited by 167 publications

References 56 publications

Efficient and Sustainable in situ Photo‐Fenton Reaction to Remove Phenolic Pollutants by NH2‐MIL‐101(Fe)/Ti3C2Tx Schottky‐Heterojunctions

Efficient and Sustainable in situ Photo‐Fenton Reaction to Remove Phenolic Pollutants by NH2‐MIL‐101(Fe)/Ti3C2Tx Schottky‐Heterojunctions

Photo-Fenton Antifouling Membrane Based on Hydrophilized MIL-88A for Sustainable Treatment of Colored Emulsions

Cu2O/SrTi1–xCrxO3 Heterojunction Photocatalyst for the Efficient Degradation of Isopropanol under Visible Light Irradiation

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Efficient and Sustainable in situ Photo‐Fenton Reaction to Remove Phenolic Pollutants by NH₂‐MIL‐101(Fe)/Ti₃C₂T_x Schottky‐Heterojunctions

Efficient and Sustainable in situ Photo‐Fenton Reaction to Remove Phenolic Pollutants by NH₂‐MIL‐101(Fe)/Ti₃C₂T_x Schottky‐Heterojunctions

Cu₂O/SrTi_1–xCr_xO₃ Heterojunction Photocatalyst for the Efficient Degradation of Isopropanol under Visible Light Irradiation